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Статті в журналах з теми "Porphyrins"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 25 липня 2025

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1

Mohd Radzuan, Nuur Haziqah, Zaitun Ghazali, Nurul Izzaty Hassan, Mohd Bakri Bakar, Siti Aishah Hasbullah, and Muntaz Abu Bakar. "Synthesis and Characterization of 5,15 A2-Type Porphyrin, Metalloporphyrin and Preliminary Study on Carbon Dioxide Adsorption." Sains Malaysiana 54, no. 6 (2025): 1535–49. https://doi.org/10.17576/jsm-2025-5406-09.

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Анотація:

Porphyrins are among the most extensively studied compounds in chemistry due to their remarkable stability, optical, and photophysical properties. In recent years, advancements in their diverse applications have driven the exploration of porphyrins with different functional groups, allowing for more specific applications. Nowadays, a greater focus is being placed on the development of materials for capturing and converting carbon dioxide (CO2) into value-added products. Despite their promising features, the application of porphyrins in carbon dioxide adsorption has been hindered by their initi

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2

Sooambar, Chloé, Vincent Troiani, Hongjin Qiu, et al. "Chirality and spatially pre-organized multi-porphyrinoids." Journal of Porphyrins and Phthalocyanines 22, no. 04 (2018): 291–302. http://dx.doi.org/10.1142/s1088424618500396.

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We report herein that chiral and enantiopure compounds such nucleosides and peptides can pre-organize multi-porphyrinic systems and influence their properties. The first example given concerns star-shaped mutli-porphyrins with chiral and enantiopure nucleosidic linkers. If the configuration is indeed a star-shaped nanomolecule, it appears that the induced conformation is nothing as expected. The four peripheral Zn(II) porphyrins collapse over the free-base central one, inducing totally different photo-physical properties. Despite a minor expected light energy harvesting behavior, the principal

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3

Wenceslau, Adriana C., Guilherme L. Q. C. Ferreira, Noboru Hioka, and Wilker Caetano. "Spectroscopic studies of pyridil and methoxyphenyl porphyrins in homogeneous and Pluronic®-based nanostructured systems." Journal of Porphyrins and Phthalocyanines 19, no. 11 (2015): 1168–76. http://dx.doi.org/10.1142/s1088424615500996.

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Spectroscopic properties of Porphyrins TPyP (tetra(4-pyridil)porphyrin), TMPP (tetrakis(4-methoxypheny) porphyrin) and its zinc metaled derivatives porphyrins Zn-TPyP and Zn-TMPP respectively, were studied in homogeneous and micro heterogeneous systems, comprising nanostructured Pluronic® copolymeric micellar systems, as a promising drug delivery systems for the porphyrins investigated. Physico-chemical properties such as, hydrophobicity degree, self- aggregation in solvents of different polarities and water/ethanol mixtures (monofasic binary), as well as kinetics profile and isotherm binding,

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4

Puzikova, А. I., Е. А. Litvin, D. А. Kildyushkin, and А. Е. Druy. "Application of high-performance liquid chromatography in porphyrias diagnostics." Pediatric Hematology/Oncology and Immunopathology 20, no. 3 (2021): 140–44. http://dx.doi.org/10.24287/1726-1708-2021-20-3-140-144.

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Porphyrias are distinguished by the stage of heme synthesis at which a failure occurs, leading to the accumulation of intermediate products – porphyrins. Due to the low specificity of clinical manifestations of porphyria and the latent course of the disease, their timely diagnosis is difficult. This article substantiates the effectiveness of high-performance liquid chromatography method in the determination of porphyrins. The method is suitable for porphyrin determination in urine, blood and feces of patients. Examples of its work are shown.

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5

Richeter, Sébastien, Christophe Jeandon, Christian Sauber, Jean-Paul Gisselbrecht, Romain Ruppert, and Henry J. Callot. "Preparation, mass spectrometry and electrochemical studies of metal connected porphyrin oligomers." Journal of Porphyrins and Phthalocyanines 06, no. 06 (2002): 423–30. http://dx.doi.org/10.1142/s108842460200052x.

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Анотація:

Oligomers built from metal ions and porphyrins bearing enaminoketones at the ring periphery were prepared. These dimers or trimers, where all porphyrinic rings are coplanar, show large interactions in the ground state between the individual porphyrin cores, as shown by their optical properties and electrochemical studies. In particular, a spectacular decrease of the HOMO-LUMO gap (with values as low as 1.32 eV) was observed for monomeric porphyrins metalated on the external sites. Along with standard analytical methods, APPI (Atmospheric Pressure PhotoIonization) mass spectrometry was found to

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6

Kaczynski, Jerzy, Göran Hansson, and Sven Wallerstedt. "Increased Porphyrins in Primary Liver Cancer Mainly Reflect a Parallel Liver Disease." Gastroenterology Research and Practice 2009 (2009): 1–6. http://dx.doi.org/10.1155/2009/402394.

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Hepatic porphyries have been associated with an increased risk of primary liver cancer (PLC), which on the other hand may cause an increased porphyrin production. To evaluate the role of an underlying liver disorder we analyzed porphyrins in patients with hepatocellular carcinoma (HCC)(n=65), cholangiocellular carcinoma(n=3), or suspected PLC, which turned out to be metastases(n=18)or a benign disorder(n=11). None of the patients had a family history of porphyry or clinical signs of porphyry. Increased aminolevulinic acid or porphyrin values were common not only in patients with PLC (43%) but

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7

Hindmarsh, J. Thomas, Linda Oliveras, and Donald C. Greenway. "Plasma Porphyrins in the Porphyrias." Clinical Chemistry 45, no. 7 (1999): 1070–76. http://dx.doi.org/10.1093/clinchem/45.7.1070.

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Abstract Background: As an aid in the diagnosis and management of porphyria we have developed a method to fractionate and quantify plasma porphyrins and have evaluated its use in various porphyrias. Methods: We used HPLC with fluorometric detection to measure plasma concentrations of uroporphyrin I and III, heptacarboxyl III, hexacarboxyl III, pentacarboxyl III, and coproporphyrin I and III. We studied 245 healthy subjects, 32 patients with classical porphyria cutanea tarda (PCT), 12 patients with PCT of renal failure, 13 patients with renal failure, 8 patients with pseudoporphyria of renal fa

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8

Thunell, S. "Porphyrins, porphyrin metabolism and porphyrias. I. Update." Scandinavian Journal of Clinical and Laboratory Investigation 60, no. 7 (2000): 509–40. http://dx.doi.org/10.1080/003655100448310.

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9

Vega Mayoral, Victor, Alicia Götz, Saül Garcia Orrit, Klaus Müllen, Akimitsu Narita, and Juan Ramon Cabanillas Gonzalez. "Photoexcited States Dynamics on Cu(II) Porphyrines-Nanographenes Dyads." ECS Meeting Abstracts MA2024-01, no. 14 (2024): 1141. http://dx.doi.org/10.1149/ma2024-01141141mtgabs.

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Анотація:

Donor-acceptor systems have garnered significant attention in the fields of semiconducting materials and light harvesting.1 Particularly intriguing are porphyrin diads, wherein porphyrins are covalently bonded to nanographenes, forming a dyad with an expected electron transfer from the porphyrin to the nanographene. In our study, we leverage the excellent charge transport properties of Hexabenzocoronene (HBC) in combination with the superior light harvesting capabilities of Cu(II) porphyrins. The steady-state absorption spectra of the dyads exhibit a linear combination of HBC and porphyrin spe

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10

Uemori, Yoshio, Masato Sakurai, Atsuko Osada, Hiroki Munakata, Hiroyasu Imai, and Shigeo Nakagawa. "Synthesis and properties of water-soluble porphyrins bearing multidentate ligands." Journal of Porphyrins and Phthalocyanines 08, no. 08 (2004): 1047–54. http://dx.doi.org/10.1142/s1088424604000416.

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Water-soluble porphyrins bearing multidentate ligands were prepared by covalent binding of nitrilotriacetic acid to 5,10,15,20-tetrakis(4-aminophenyl)porphyrin or three atropisomers of 5,10,15,20-tetrakis(2-aminophenyl)porphyrin. The acid-base properties and monomer-dimer behavior of the porphyrins were affected by the positions of the multidentate ligands with respect to the porphyrin plane. Among the porphyrins, the porphyrin bearing multidentate ligands at the para position of the phenyl groups dimerized in an aqueous solution. The association constants of the porphyrins with various aromat

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11

Inokuma, Yasuhide, and Atsuhiro Osuka. "meso-Porphyrinyl-Substituted Porphyrin and Expanded Porphyrins." Organic Letters 6, no. 21 (2004): 3663–66. http://dx.doi.org/10.1021/ol048953f.

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12

Cribbin, Liam, Brendan Twamley, Nicolae Buga, et al. "C–C Coupling in sterically demanding porphyrin environments." Beilstein Journal of Organic Chemistry 20 (November 4, 2024): 2784–98. http://dx.doi.org/10.3762/bjoc.20.234.

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Анотація:

Unlike their planar counterparts, classic synthetic protocols for C–C bond forming reactions on nonplanar porphyrins are underdeveloped. The development of C–C bond forming reactions on nonplanar porphyrins is critical in advancing this field of study for more complex porphyrin architectures, which could be used in supramolecular assemblies, catalysis, or sensing. In this work a library of arm-extended dodecasubstituted porphyrins was synthesized through the optimization of the classic Suzuki–Miyaura coupling of peripheral haloaryl substituents with a range of boronic acids. We report on palla

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13

Egemen, Gamze, Mustafa Hayvalı, Zeynel Kılıç, A. Osman Solak, and Zafer Üstündağ. "Phosphorus-nitrogen compounds Part 17: The synthesis, spectral and electrochemical investigations of porphyrino-phosphazenes." Journal of Porphyrins and Phthalocyanines 14, no. 03 (2010): 227–34. http://dx.doi.org/10.1142/s1088424610001945.

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The reactions of unsymmetrical porphyrins (1 and 2) with Ni(OAc)2·4H2O in boiling DMF produce porphyrin complexes (3 and 4). From the reactions of free porphyrin ligands 1 and 2 with hexachlorocyclotriphosphazatriene, N3P3Cl6 , the new free porphyrino-phosphazene derivatives (5 and 6) are obtained. On the other hand, the reactions of N3P3Cl6 with porphyrin complexes (3 and 4) afford the new porphyrino-phosphazene complexes (7 and 8). In the literature there are a few examples of the porphyrino-phosphazene architectures. The structural investigations of all the compounds have been made by eleme

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14

Dinache, Andra, Simona Nistorescu, Tatiana Tozar, et al. "Spectroscopic Investigations of Porphyrin-TiO2 Nanoparticles Complexes." Molecules 28, no. 1 (2022): 318. http://dx.doi.org/10.3390/molecules28010318.

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This study presents the spectral characterization of TiO2 nanoparticles (NPs) functionalized with three porphyrin derivatives: 5,10,15,20-(Tetra-4-aminophenyl) porphyrin (TAPP), 5,10,15,20-(Tetra-4-methoxyphenyl) porphyrin (TMPP), and 5,10,15,20-(Tetra-4-carboxyphenyl) porphyrin (TCPP). UV-Vis absorption and Fourier transform infrared spectroscopy–attenuated total reflection (FTIR-ATR) spectroscopic studies of these porphyrins and their complexes with TiO2 NPs were performed. In addition, the efficiency of singlet oxygen generation, the key species in photodynamic therapy, was investigated. UV

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15

Chambron, Jean-Claude, Jean-Paul Collin, Isabelle Dixon, Valérie Heitz, Xavier J. Salom-Roig, and Jean-Pierre Sauvage. "Synthesis of one-dimensional bis-porphyrinic compounds with a transition metal complex as bridging unit." Journal of Porphyrins and Phthalocyanines 08, no. 01 (2004): 82–92. http://dx.doi.org/10.1142/s1088424604000076.

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Анотація:

Linear multicomponent systems, consisting of two porphyrins attached to a central transition metal center, have been prepared and some of their electron- or energy transfer properties have been studied. Each porphyrin is covalently bound to a bidentate or a terdentate ligand, these coordinating molecules being gathered around the metal to afford the desired structure. The spatial arrangement is such that the porphyrinic components are located at both ends of an axis, the transition metal occupying its center. The edge-to-edge distance between the porphyrins is relatively large (~ 20 to 25 Å) a

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16

CHATTERJEE, SHAMPA, and T. S. SRIVASTAVA. "Spectral investigations of the interaction of some porphyrins with bovine serum albumin." Journal of Porphyrins and Phthalocyanines 04, no. 02 (2000): 147–57. http://dx.doi.org/10.1002/(sici)1099-1409(200003)4:2<147::aid-jpp163>3.0.co;2-z.

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The binding of meso-tetrakis[4-(carboxymethyleneoxy)phenyl]porphyrin (T4CPP), meso-tetrakis[3-(carboxymethyleneoxy)phenyl]porphyrin (T3CPP) and meso-tetrakis[3,4-bis(carboxymethyl-eneoxy)phenyl]porphyrin (T3, 4BCPP) with bovine serum albumin (BSA) at pH 7.4 has been studied at 420 nm in detail. The results show hypochromicity along with a red shift in the Soret band of the porphyrins. This suggests that these porphyrins bind to BSA as monomers. Further analysis of these data supports the non-interactive binding of T4CPP and T3CPP with BSA and the cooperative binding of T3, 4BCPP with BSA. Thes

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17

Yan, Guo-Ping, Kathryn E. Fairfull-Smith, Craig D. Smith, Graeme R. Hanson, and Steven E. Bottle. "Porphyrin containing isoindoline nitroxides as potential fluorescence sensors of free radicals." Journal of Porphyrins and Phthalocyanines 15, no. 04 (2011): 230–39. http://dx.doi.org/10.1142/s1088424611003203.

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A series of new spin-labeled porphyrin containing isoindoline nitroxide moieties were synthesized and characterized as potential free radical fluorescence sensors. Fluorescence-suppression was observed in the free-base monoradical porphyrins, whilst the free-base biradical porphyrins exhibited highly suppressed fluorescence about three times greater than the monoradical porphyrins. The observed fluorescence-suppression was attributed to enhanced intersystem crossing resulting from electronexchange between the doublet nitroxide and the excited porphyrin fluorophore. Notably, fluorescencesuppres

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18

Matsumoto, Jin, Tsutomu Shiragami, Kazutaka Hirakawa, and Masahide Yasuda. "Water-Solubilization of P(V) and Sb(V) Porphyrins and Their Photobiological Application." International Journal of Photoenergy 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/148964.

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Porphyrins have been widely utilized as biochemical and biological functional chromophores which can operate under visible-light irradiation. Water-soluble porphyrins have been used as the drug for photodynamic therapy (PDT) and photodynamic inactivation (PDI). Although usual water-solubilization of porphyrins has been achieved by an introduction of an ionic group such as ammonium, pyridinium, sulfonate, phosphonium, or carboxyl to porphyrin ring, we proposed the preparation of water-soluble P and Sb porphyrins by modification of axial ligands. Alkyl (type A), ethylenedioxy (type E), pyridiniu

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19

Sassa, Shigeru. "Novel Effects of Heme Biological Systemst and Heme-related Compounds in Biological Systems." Current Medicinal Chemistry 3, no. 4 (1996): 273–90. http://dx.doi.org/10.2174/092986730304220302112129.

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Abstract: Heme and heme-related compounds such as porphyrins have a variety of biological and clinical activities. This review highlights some of the novel effects of these compounds in medicinal chemistry. Heme which has no photoreactive properties, can serve as the prosthetic group for various hemoproteins, or as a substrate for microsomal heme oxygenase (HO). In contrast, porphyrins have photodynamic activities but usually do not serve as substrates in biological systems. Thus, heme and heme analogues are often used to influence enzyme activities in tissues, while porphyrins by taking advan

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20

Sánchez-Muñoz, Esteban, José L. Gárate-Morales, Jacinto Sandoval-Lira, Julio M. Hernández-Pérez, and Rocío Aguilar-Sánchez. "Porphyrin Supramolecular Arrays Formed by Weakly Interacting Meso-Functional Groups on Au(111)." Molecules 24, no. 18 (2019): 3326. http://dx.doi.org/10.3390/molecules24183326.

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The formation of a binary porphyrinic self-assembled system between meso-tetrakis(4-carboxyphenyl) porphyrin (TCPP) and meso-tetrakis(4-dimethyl amino) porphyrin (TDAP) was easily designed through non-covalent interactions in solution and adsorbed on a gold substrate. It was found that non-covalent interactions and geometrical conformations between porphyrins allow their self-assembly into a well-defined arrangement, which was confirmed by UV-Vis spectroscopy, electrochemistry, atomic force microscopy and density functional theory (DFT) studies.

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21

VINODU, MIKKI V., and M. PADMANABHAN. "Ionically bound metalloporphyrin pairs on solid polymer support." Journal of Porphyrins and Phthalocyanines 05, no. 11 (2001): 763–66. http://dx.doi.org/10.1002/jpp.543.

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The present work demonstrates a simple and elegant strategy by which synthetically simple porphyrins are grafted on solid polymer support to generate porphyrin pairs held together by strong coulombic forces. Metalloporphyrins of tetra(4-pyridyl)porphyrins (MTPyP) were reacted with chloromethylated polystyrene (PS) beads to get covalently bound monocationic porphyrins on the polymer support (PS–MTPyP+). These were then converted to their tetracationic species (PS–MTMe3PyP4+) by exhaustive quaternisation, using CH 3 I . These polymer-grafted cationic porphyrins were made to react with tetraanion

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22

YUAN, HONGPING, and L. KEITH WOO. "Synthesis and Characterization of Thiol-Derivatized Porphyrins and Metalloporphyrin complexes." Journal of Porphyrins and Phthalocyanines 01, no. 02 (1997): 189–200. http://dx.doi.org/10.1002/(sici)1099-1409(199704)1:2<189::aid-jpp23>3.0.co;2-g.

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A series of thiol-derivatized porphyrins and the corresponding cobalt and zinc complexes were synthesized from 5-(p-aminophenyl)-10,15,20-triphenylporphyrin ( H 2 TPP - NH 2), and 5α,15α-bis(o-aminophenyl)porphyrin ( H 2 DPE - ( NH 2)2). These derivatized porphyrins have a different number of thiol appendages attached via amide linkages at different locations. The thiol-derivatized porphyrins made from H 2 TPP - NH 2, H 2 TPP - NHC ( O )( CH 2) n SH ( n = 2, 4, 5, 10), have one alkyl-thiol appendage attached to the porphyrin through an amide linkage on the p-aminophenyl position. The derivativ

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23

Carson, R. W., E. J. Dunnigan, T. D. DuBose, D. E. Goeger, and K. E. Anderson. "Removal of plasma porphyrins with high-flux hemodialysis in porphyria cutanea tarda associated with end-stage renal disease." Journal of the American Society of Nephrology 2, no. 9 (1992): 1445–50. http://dx.doi.org/10.1681/asn.v291445.

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Plasma porphyrin levels are markedly increased in patients with porphyria cutanea tarda (PCT) associated with end-stage renal disease. Conventional hemodialysis (CHD) with lower blood flow rates (less than 250 mL/min) and cuprophan or cellulose acetate membranes is ineffective in removing significant amounts of porphyrins in this condition. Changes in plasma porphyrin levels and porphyrin clearances during hemodialysis with higher blood flow rates and more-permeable, high-efficiency cellulose acetate and high-flux polysulfone dialyzers were evaluated in a chronic hemodialysis patient with PCT

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24

Imahori, Hiroshi, and Tomokazu Umeyama. "Porphyrin-modified electrodes for solar energy conversion." Journal of Porphyrins and Phthalocyanines 13, no. 10 (2009): 1063–68. http://dx.doi.org/10.1142/s1088424609001315.

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Анотація:

This mini review presents our recent developments in porphyrin-modified electrodes for solar energy conversion. Various porphyrins have been assembled on nanostructured semiconducting electrodes to achieve efficient photocurrent generation. First, porphyrins have been organized with fullerenes onto semiconducting electrodes to elucidate the relationship between the molecular structures, film structures, and photoelectrochemical properties of the modified electrodes. Formation of hole and electron-transporting highways in the porphyrin/fullerene composite film led to the remarkable enhancement

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25

Almeida, José, Maria E. Fortună, Lucia Pricop, et al. "(Aminophenyl)porphyrins as precursors for the synthesis of porphyrin-modified siloxanes." Journal of Porphyrins and Phthalocyanines 23, no. 09 (2019): 1001–12. http://dx.doi.org/10.1142/s1088424619500573.

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Анотація:

The present research reports the efficient synthesis of mono- and di-(aminophenyl)porphyrins and their metalation with Zn(II) using microwave irradiation. The subsequent reaction of amino-functionalized porphyrins with siloxane moieties bearing epoxy or carboxyl functional groups provided four new porphyrin-modified siloxanes. The structure of the resulting derivatives was established by 1H-NMR and MALDI-TOF-MS. The optical properties of the porphyrin chromophores were preserved, as proven by comparing the absorption and emission spectra of the initial porphyrins to those of the porphyrin-modi

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26

Abe, K., and R. Konaka. "Quantification of urinary porphyrins by liquid chromatography after oxidation of porphyrinogens." Clinical Chemistry 35, no. 8 (1989): 1619–22. http://dx.doi.org/10.1093/clinchem/35.8.1619.

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Анотація:

Abstract A quantitative "high-performance" liquid-chromatographic method is described for determining porphyrins in human urine. Porphyrinogens in urine are first converted to the corresponding porphyrins by oxidation with iodine. Uroporphyrin, hepatacarboxylic acid porphyrin, hexacarboxylic acid porphyrin, pentacarboxylic acid porphyrin, and coproporphyrin I and III isomers are then separated on a reversed-phase column and measured by fluorometry. Analysis for the six porphyrins is complete within 24 min, including reconditioning for the next sample. The detection limit (twice the signal/nois

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27

Poddutoori, Prashanth, Jam Riyan Hamza, Jatan Kumar Sharma, Francis D'Souza, and Paul Karr. "Synthesis, Electrochemistry and Photochemistry of Hypervalent Phosphorus(V) Porphyrin and Antimony(V) Porphyrin Black Dyes." ECS Meeting Abstracts MA2024-01, no. 14 (2024): 1158. http://dx.doi.org/10.1149/ma2024-01141158mtgabs.

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Анотація:

In the last few years, our focus has been on push-pull type hypervalent Group 15 porphyrins with intramolecular charge transfer (ICT) properties. Insertion of P(V) or Sb(V) ion in the porphyrin cavity results in a highly electron-deficient porphyrin center, under this condition the presence of electron-rich units in porphyrin meso-positions results in charge transfer within the molecules. Recently, we extended this strategy to 5,10,5,20-tetrakis(triphenylamine)porphyrin derivative where strong electron donor triphenylamine (TPA) units are in meso-positions. Upon insertion of the P(+5) and Sb(+

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28

Shee, Nirmal Kumar, Min Kyoung Kim, and Hee-Joon Kim. "Supramolecular Porphyrin Nanostructures Based on Coordination-Driven Self-Assembly and Their Visible Light Catalytic Degradation of Methylene Blue Dye." Nanomaterials 10, no. 11 (2020): 2314. http://dx.doi.org/10.3390/nano10112314.

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A series of porphyrin triads (1–4), in which each triad is composed of a Sn(IV) porphyrin and two free-base (or Zn(II)) porphyrins, was synthesized and their self-assembled nanostructures were studied. Depending on the substituent on porphyrin moieties, each triad was self-assembled into a different nanostructure. In particular, the cooperative coordination of 3-pyridyl groups in the Sn(IV) porphyrin with the axial Zn(II) porphyrins in triad 4 leads to forming uniform nanofibers with an average width of 10–22 nm. Other triads without the coordinating interaction between the central Sn(IV) porp

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29

Aloyan, Lusine, Yeva Dalyan, and Aleksey Gogolev. "New Porphyrins/Calf Thymus DNA Complexes - Their Thermostability." Advanced Materials Research 1084 (January 2015): 554–58. http://dx.doi.org/10.4028/www.scientific.net/amr.1084.554.

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The paper studies the melting parameters of the complexes of water soluble cationic 3N- and 4N-pyridyl porphyrins with different peripheral substituents (oxyethyl, buthyl, allyl, metallyl) with DNA. The results indicate that the presence of porphyrin changes the shape and parameters of DNA melting curve. The porphyrin concentration increase results in the increase of the melting temperature (Tm) and melting interval (ΔT) of DNA. With the porphyrin-DNA concentration ratio ν = 0.01, changes of melting temperature have not been observed. The melting intervals almost do not change upon the additio

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30

Ikawa, Yoshiya, Sho Katsumata, Ryuichi Sakashita, Shinobu Sato, Shigeori Takenaka, and Hiroyuki Furuta. "Water-soluble porphyrinoids as G-quadruplex binders and telomerase inhibitors." Journal of Porphyrins and Phthalocyanines 20, no. 08n11 (2016): 1041–48. http://dx.doi.org/10.1142/s108842461650053x.

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Water-soluble derivatives of three kinds of expanded porphyrins (N-fused pentaphyrin, hexaphyrin, and heptaphyrin) were synthesized and their binding ability to G-quadruplex (G4-) DNA was evaluated. The inhibitory effects on enzymatic telomere extension were also investigated together with other tetrapyrrolic porphyrinoids. While expanded porphyrins increased the melting temperature of G4-DNA more effectively than the regular porphyrins, a porphyrin isomer (N-confused porphyrin) showed the highest inhibitory effect on telomerase activity.

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31

Wang, Xia, Yu Cai, Weiqin Li, et al. "Research Progress on Serum Porphyrin and Chronic Liver Disease." Journal of Clinical and Nursing Research 6, no. 3 (2022): 221–28. http://dx.doi.org/10.26689/jcnr.v6i3.4017.

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Liver cirrhosis is an important cause of chronic liver cancer. At present, a breakthrough has been achieved in the development of chronic hepatitis C treatment, but there is no effective measure to completely cure chronic hepatitis B. Porphyrins are a class of macromolecular heterocyclic compounds formed by interconnecting the ?-carbon atoms of four pyrrole-like substituents through hypomethyl bonds. Porphyrins and their derivatives widely exist in organelles related to energy transfer in organisms. They are mainly involved in the synthesis of heme in human body. Heme is an iron-containing por

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32

Sánchez-Resa, Daniel, Laetitia Schoepff, Ryan Djemili, Stéphanie Durot, Valérie Heitz, and Barbara Ventura. "Photophysical properties of porphyrinic covalent cages endowed with different flexible linkers." Journal of Porphyrins and Phthalocyanines 23, no. 07n08 (2019): 841–49. http://dx.doi.org/10.1142/s1088424619500925.

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In-depth photophysical studies of four flexible covalent cages bearing either two free-base porphyrins or one free-base porphyrin and one Zn(II) porphyrin, connected by linkers of different lengths, are reported. In the case of the cages with two free-base porphyrins, exciton coupling between the porphyrins is evidenced by large and split Soret bands in the absorption spectra, but the different length of the linkers has only a slight effect on their emission properties. Strong electronic interactions between the porphyrins are also evidenced for the cages that incorporate a free-base porphyrin

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33

Kano, Koji. "Molecular complexes of water-soluble porphyrins." Journal of Porphyrins and Phthalocyanines 08, no. 02 (2004): 148–55. http://dx.doi.org/10.1142/s1088424604000143.

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Water-soluble porphyrins tend to form self-aggregates under certain conditions. The structure of the self-aggregate (H-type dimer, H-type higher aggregate, or J-aggregate) sensitively depends on the structure of the peripheral substituents at the meso-positions of the porphyrin. Water-soluble porphyrins also form relatively stable π-stacked complexes with various aromatics. Polar effects are important in complexation of anionic porphyrins with anthraquinonesulfonates. The results suggest that the main attractive interaction for formation of π-stacked complexes of water-soluble porphyrins is th

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34

Qi, Zhen-Li, Yun-Hui Cheng, Zhou Xu, and Mao-Long Chen. "Recent Advances in Porphyrin-Based Materials for Metal Ions Detection." International Journal of Molecular Sciences 21, no. 16 (2020): 5839. http://dx.doi.org/10.3390/ijms21165839.

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Porphyrins have planar and conjugated structures, good optical properties, and other special functional properties. Owing to these excellent properties, in recent years, porphyrins and their analogues have emerged as a multifunctional platform for chemical sensors. The rich chemistry of these molecules offers many possibilities for metal ions detection. This review mainly discusses two types of molecular porphyrin and porphyrin composite sensors for metal ions detection, because porphyrins can be functionalized to improve their functional properties, which can introduce more chemical and funct

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35

Huh, Seong, Sung-Jin Kim, and Youngmee Kim. "Porphyrinic metal–organic frameworks from custom-designed porphyrins." CrystEngComm 18, no. 3 (2016): 345–68. http://dx.doi.org/10.1039/c5ce02106e.

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This paper highlights porphyrinic metal–organic frameworks (porph-MOFs) assembled from metal ions and custom-designed porphyrins: pyridyl-based, carboxyphenyl-based porphyrins and other custom-designed porphyrins.

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36

Yan, Jia Ying, Ya Qing Feng, Fang Qun Zhou, Yi Wen Chang, and Bao Zhang. "Studies on Sonogashira Coupling Reaction of Dibenzoporphyrin." Advanced Materials Research 581-582 (October 2012): 317–21. http://dx.doi.org/10.4028/www.scientific.net/amr.581-582.317.

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Changing the proportion of NBS and porphyrin, dibromination of β, β’- π-extended porphyrins was found to selectively occur to the β and β’ position of the porphyrins which is antipotal to the fused aromatic ring. Subsequent Sonogashira coupling of the resultant dibromoporphyrin introduced a carboxylphenylethynyl group to the π-extended porphyrin and the π conjugation was thus further elongated. The coupling products have shown a broadening and a red-shift of the Soret band and Q bands in the UV-Vis absorption spectra compared with the π-extended porphyrin starting materials and the original un

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37

Young, James W., and Eugene T. Conte. "Porphyrias and Porphyrins." International Journal of Dermatology 30, no. 6 (1991): 399–406. http://dx.doi.org/10.1111/j.1365-4362.1991.tb03893.x.

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38

Rein, Regis, and Nathalie Solladie. "Rigid and Flexible Bis-Porphyrinic Tweezers: Efficient Molecular Recognition of Bidentate Bases." ECS Meeting Abstracts MA2024-01, no. 14 (2024): 1118. http://dx.doi.org/10.1149/ma2024-01141118mtgabs.

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Increasing efforts are devoted to the synthesis of cofacial bis-porphyrinic tweezers able to complex various bidentate guests through axial coordination of the Zn(II) porphyrins by the two nitrogen atoms. Elaboration of rigid receptors appeared up to now as the ideal way to pre-organize a bis-porphyrinic cavity and increase the stability of the formed host/guest complexes. However, the choice of using rigid spacer to attach the two porphyrins together may cost a lot as far as solubility and stability are concerned. The synthetic pathways necessary to achieve the synthesis of rigid systems are

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39

Cohen, Brian A., Alain E. Kaloyeros, and Magnus Bergkvist. "Nucleotide-driven packaging of a singlet oxygen generating porphyrin in an icosahedral virus." Journal of Porphyrins and Phthalocyanines 16, no. 01 (2012): 47–54. http://dx.doi.org/10.1142/s1088424611004324.

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Results are reported from investigations of the interactions between MS2 bacteriophages and a cationic porphyrin with potential use in photodynamic therapy. Based on the naturally strong binding between porphyrins and nucleic acids, it is suggested that this non-enveloped capsid could act as a self-loading, nanoscale carrier of porphyrins. By applying size exclusion chromatography in conjunction with UV-vis and fluorescence spectroscopy, it is demonstrated that approximately 250 porphyrin molecules could associate and co-elute with a single capsid. Additionally, there is an observed red shift

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40

Frant, Maciej P., Mariusz Trytek, Kamil Deryło, Mateusz Kutyła, and Roman Paduch. "Cellular Localization of Selected Porphyrins and Their Effect on the In Vitro Motility of Human Colon Tumors and Normal Cells." Molecules 28, no. 7 (2023): 2907. http://dx.doi.org/10.3390/molecules28072907.

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Standard therapies for colorectal cancer cannot eliminate or sufficiently reduce the metastasis process. Photodynamic therapy (PDT) may be an alternative to minimizing this problem. Here, we examined the cellular localization of selected porphyrins and determined whether free-base and manganese (III) metallated porphyrins may limit colon cancer cells’ (HT29) or normal colon epithelial cells’ (CCD 841 CoTr) motility in vitro. White light irradiation was used to initiate the photodynamic effect. Porphyrin uptake by the cells was determined by porphyrin fluorescence measurements through the use o

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41

Higashino, Tomohiro, Yamato Fujimori, Issei Nishimura, and Hiroshi Imahori. "Effects of meso-diarylamino group of porphyrins on optical and electrochemical properties." Journal of Porphyrins and Phthalocyanines 24, no. 01n03 (2020): 67–74. http://dx.doi.org/10.1142/s1088424619500652.

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Introduction of an electron-donating meso-diarylamino group into a porphyrin core affords its broadened and red-shifted absorption and raises the HOMO level of the porphyrin. In this regard, porphyrins with multiple meso-diarylamino groups are expected to show unique optical and electrochemcial properties depending on the number of the meso-diarylamino groups. Herein, we report a series of porphyrins with a different number of the meso-diarylamino groups. They were prepared by the iodine(III)-mediated oxidative amination reaction of the corresponding meso-free porphyrins. With increasing the n

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42

Mikata, Yuji, Minako Shibata, Yasuko Baba, Toyoji Kakuchi, Misaki Nakai, and Shigenobu Yano. "Synthesis and photodynamic properties of maltohexaose-conjugated porphyrins." Journal of Porphyrins and Phthalocyanines 16, no. 11 (2012): 1177–85. http://dx.doi.org/10.1142/s1088424612501155.

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A series of porphyrin derivatives with one to four maltohexaose moieties in their meso positions have been synthesized. Zinc or free-base m-THPP (5,10,15,20-tetrakis(m-hydroxyphenyl)-porphyrin) was used as the porphyrin platform. The reaction of m-THPP with 3-iodopropyl nonadecaacetylmaltohexaoside afforded a mixture of all possible combinations of glycoconjugated porphyrins having one to four maltohexaose moieties; monoglycosylated (Ac-1), bisglycosylated (Ac-cis-2 and Ac-trans-2), triglycosylated (Ac-3), and tetraglycosylated (Ac-4) porphyrins were obtained in 11–26% yield. Removal of acetyl

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43

Costa, Joana I. T., Augusto C. Tomé, Maria G. P. M. S. Neves, and José A. S. Cavaleiro. "5,10,15,20-tetrakis(pentafluorophenyl)porphyrin: a versatile platform to novel porphyrinic materials." Journal of Porphyrins and Phthalocyanines 15, no. 11n12 (2011): 1116–33. http://dx.doi.org/10.1142/s1088424611004294.

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5,10,15,20-tetrakis(pentafluorophenyl)porphyrin reacts with a range of nucleophiles (amines, alcohols, thiols, nitrogen heterocycles, and others) resulting in the nucleophilic aromatic substitution of the para-F atoms of the pentafluorophenyl groups. This reaction, which was fortuitously discovered by Kadish and collaborators in 1990, is now being extensively used to synthesize porphyrins bearing electron-donating substituents in the para-position of their meso-aryl groups. This mini-review highlights the methods of synthesis of 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin, the use of its m

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44

Gao, Yi, Ji Gang Pan, Yue Jun Huang, Shuang Yan Ding, and Meng Liang Wang. "Microwave-assisted synthesis of fluorine substituted porphyrins and kinetics of formation of zinc porphyrin complexes in acetic acid." Journal of Porphyrins and Phthalocyanines 19, no. 12 (2015): 1251–55. http://dx.doi.org/10.1142/s1088424615501096.

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Three mono-fluorine substituted porphyrin compouds were synthesized under microwave irradiation. The effects of catalysts and oxidants on the yields of mono-fluorine substituted porphyrins also were investigated. The yields of 5,10,15,20-tetrakis(4-fluorophenyl)porphyrin, 5,10,15,20-tetrakis(3-fluorophenyl)porphyrin, 5,10,15,20-tetrakis(2-fluorophenyl)porphyrin in a use of nitrobenzene in propionic acid were 36%, 30% and 28%, respectively. In addition, the zinc(II) ion incorporation reactions into porphyrins to form the zinc porphyrin complexes have been kinetically investigated in acetic acid

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45

Frant, Maciej Piotr, Mariusz Trytek, and Roman Paduch. "Assessing the In Vitro Activity of Selected Porphyrins in Human Colorectal Cancer Cells." Molecules 27, no. 6 (2022): 2006. http://dx.doi.org/10.3390/molecules27062006.

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Standard in vitro analyses determining the activity of different compounds included in the chemotherapy of colon cancer are currently insufficient. New ideas, such as photodynamic therapy (PDT), may bring tangible benefits. The aim of this study was to show that the biological activity of selected free-base and manganese (III) metallated porphyrins differs in the limitation of colon cancer cell growth in vitro. White light irradiation was also hypothesized to initiate a photodynamic effect on tested porphyrins. Manganese porphyrin (>1 μM) significantly decreased the viability of the colon t

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46

Pandey, Ravindra K., Xiang Zheng, Mahabeer P. Dobhal, and Kevin M. Smith. "Formation of chlorins and meso-substituted porphyrins through intramolecular nitrogen-carbon migration of N-substituted porphyrins." Journal of Porphyrins and Phthalocyanines 12, no. 02 (2008): 131–41. http://dx.doi.org/10.1142/s1088424608000170.

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A series of N -substituted porphyrins were synthesized either by direct alkylation of the symmetrical porphyrins or from the unsymmetrical porphyrins obtained via MacDonald's procedure using the appropriate N -substituted dipyrromethanes. Depending upon the nature of the peripheral substitutions in the porphyrin system, the nickel(II)-promoted rearrangement of these compounds gave either meso-substituted or unsubstituted Ni(II) porphyrins or chlorins. The chlorins and meso-substituted porphyrins were formed via the intramolecular migration of the N -substituent to carbon. This approach provide

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47

Ramberg, Kristin, Thor Bernt Melø, and Anders Johnsson. "In situ Assessment of Porphyrin Photosensitizers in Propionibacterium acnes." Zeitschrift für Naturforschung C 59, no. 1-2 (2004): 93–98. http://dx.doi.org/10.1515/znc-2004-1-219.

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Porphyrins are known to be efficient photosensitizer molecules and the combined action of light and porphyrins in Propionibacterium acnes have a lethal action on the cells. Identification and quantification of in situ porphyrins in P. acnes have been done using an integrating sphere connected to an ordinary absorption spectrophotometer, and the amounts of porphyrins in the cells were quantified by measuring scattering free absorption spectra of the cell suspensions. The concentration of porphyrins in P. acnes cells were increased in either of two ways; by the addition of δ-aminolevulinic acid

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48

Wang, Jieqi, Masahiko Taniguchi, David F. Bocian, and Jonathan S. Lindsey. "Synthesis of porphyrin triads chelated with thallium(III) for studies of ground-state hole/electron transfer." Journal of Porphyrins and Phthalocyanines 28, no. 08 (2024): 515–26. http://dx.doi.org/10.1142/s1088424624500524.

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Four target all-porphyrin triads have been prepared for fundamental studies of ground-state hole/electron transfer. Each triad contains thallium(III) porphyrins as bookends, which bear mesityl groups at the three non-linking meso-positions. The central porphyrin is a free base or thallium(III) porphyrin bearing mesityl or pentafluorophenyl groups at the two non-linking meso-positions. The linker is a 4,4′-diphenylethyne unit joined at the porphyrin meso-positions. The net spacer between the two bookend thallium(III) porphyrins thus consists of diphenylethyne–porphyrin–diphenylethyne and is des

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49

Wang, Hong, Yi Hu, Michael Thomas, Ajyal Alsaleh, and Francis D'Souza. "(Invited) Pi-Extended Porphyrins: Synthesis, Functionalization and Applications in Dye-Sensitized Solar Cells." ECS Meeting Abstracts MA2022-01, no. 13 (2022): 903. http://dx.doi.org/10.1149/ma2022-0113903mtgabs.

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pi-Extended porphyrins are of broad interest due to their unique combination of photophysical, optoelectronic, and physicochemical properties, and their potential applications in many areas ranging from biomedicine to organic electronics.1,2 In this talk, three series of beta-functionalized push-pull pi-extended porphyrins as sensitizers for dye-sensitized solar cells will be presented.3-5 Our studies show significant push-pull effects for these porphyrins. DFT calculations suggest that the inclusion of ethynylphenyl bridge between the donating group and the porphyrin core significantly segreg

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50

P., SURIYANARAYANAN, and KRISHNAN V. "New meso-substituted Porphyrins bearing Heterocyclic Bases. Magnetic Resonance and Electrochemical Studies." Journal of Indian Chemical Society Vol. 62, Dec 1985 (1985): 974–78. https://doi.org/10.5281/zenodo.6324984.

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Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560 012 The preparation of porphyrins appended with heterocyclic bases, pyrazole, quinoline and indole is described. The free-base porphyrins either fully or partially substituted in the <em>meso </em>positions are characterised by <sup>1</sup>H nmr spectral method. The existence of atropisomers is demonstrated in tetrakis pyrazolyl porphyrin. The electrochemical data of the free-base porphyrins reveal the influence of electron donating and electron withdrawing substituents on the porphyrin ri

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