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Journal articles on the topic 'Porphyrine de P(V)'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Gajewski, Mariusz, and Leszek Czuchajowski. "Phosphorus (V) porphyrin diaxially substituted with Leu-enkephalin." Open Chemistry 2, no. 3 (2004): 446–55. http://dx.doi.org/10.2478/bf02476200.

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AbstractSynthesis of the first phosphorus (V) porphyrin-peptide conjugate was successfully accomplished. A biologically active peptide, leucine enkephalin, was constructed on the phosphorus atom of the 5,10,15,20-meso-tetraphenylporphinato dichlorophosphorus (V) chloride. The method involved solution phase peptide synthesis. The first C-terminal amino acid in the sequence of the peptide was axially attached to the porphyrin through a linker, 3-aminopropanol, and the remainder of leucine enkephalin was synthesized by subsequent additions of amino acids. Leucine enkephalin-P(V) porphyrin conjuga

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2

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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3

Gajewski, Mariusz P., and Leszek Czuchajowski. "p-nitrobenzamide substituted phosphorus(V) porphyrins: synthesis and interactions with DNA." Journal of Porphyrins and Phthalocyanines 09, no. 07 (2005): 453–62. http://dx.doi.org/10.1142/s1088424605000563.

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Four new phosphorus(V) porphyrins were designed and synthesized. The compounds were diaxially substituted with 4-nitrobenzamide. The axial ligands were attached to the P(V) center of the porphyrins through methylene linkers of different lengths. DNA titrations showed the expected porphyrin binding. When exposed to 532 nm laser light, which corresponds to the porphyrin Q band, the photosensitizers induced DNA nicking. Inhibition of the nicking by sodium azide suggested participation of singlet oxygen in the process. Photoexcitation with 305 nm laser light, which corresponds to absorption of 4-n

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4

Hirakawa, Kazutaka, Keito Azumi, Yoshinobu Nishimura, Tatsuo Arai, Yoshio Nosaka, and Segetoshi Okazaki. "Photosensitized damage of protein by fluorinated diethoxyphosphorus(V)porphyrin." Journal of Porphyrins and Phthalocyanines 17, no. 01n02 (2013): 56–62. http://dx.doi.org/10.1142/s1088424612501258.

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The effect of the axial ligand fluorination of the water-soluble P(V)porphyrin complex on photosensitized protein damage was examined. The activity of singlet oxygen generation by diethoxyP(V) porphyrin was slightly improved by the fluorination of the ethoxy chains. Absorption spectrum measurements demonstrated the binding interaction between the P(V)porphyrins and human serum albumin, a water-soluble protein. Photo-irradiated P(V)porphyrins damaged the amino acid residue of human serum albumin, resulting in the decrease of the fluorescence intensity from the tryptophan residue of human serum

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5

Buchler, Johann W., and Steffen B. Kruppa. "Metal Complexes with Tetrapyrrole Ligands, LV [ 1 ] Improved Syntheses of Oxorhenium(V) Porphyrins and Novel Trichlororhenium(V) Porphyrins." Zeitschrift für Naturforschung B 45, no. 4 (1990): 518–30. http://dx.doi.org/10.1515/znb-1990-0418.

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The reaction of ReCl5 with a porphyrin H2(P) [2, 3] in refluxing trichlorobenzene represents a very efficient synthesis of oxorhenium(V) porphyrins ReO(P)X where X is a uninegative anion. Thus, rhenium is inserted to octaethylporphyrin and a variety of tetraarylporphyrins. The primary products are the paramagnetic trichlororhenium(V) porphyrins, ReCl3(P), which are remarkably resistant to hydrolysis. If moisture is not rigorously excluded from the metal insertion system, chlorooxorhenium(V) porphyrins ReO(P)Cl are formed which during alumina chromatography are converted to the methoxides ReO(P

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6

Sharma, Ritambhara, and Mangalampalli Ravikanth. "Phosphorus complexes of porphyrinoid macrocycles." Journal of Porphyrins and Phthalocyanines 20, no. 08n11 (2016): 895–917. http://dx.doi.org/10.1142/s1088424616500851.

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Phosphorus complexes of porphyrinoids such as porphyrins, corroles, [Formula: see text]-fused porphyrins, [Formula: see text]-fused expanded porphyrins and expanded porphyrins can be prepared readily by treating the porphyrinoid with phosphorylating agents such as PX3, PX5and POX3(X [Formula: see text] Cl or Br) under standard reaction conditions. In phosphorus porphyrinoids, the phosphorus is generally high valent [Formula: see text]5 oxidation state and the coordination number is varied from four to six. The insertion of P(V) into porphyrinoids alters the structure and electronic properties

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7

Shirnidzu, Takeo, and Hiroshi Segawa. "-Molecular Engineering of P(V)porphyrin-." Phosphorus, Sulfur, and Silicon and the Related Elements 111, no. 1 (1996): 93. http://dx.doi.org/10.1080/10426509608054722.

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8

Kuzmin, Sergey M., Svetlana A. Chulovskaya, and Vladimir I. Parfenyuk. "The coulometric approach to the superoxide scavenging activity determination: The case of porphyrin derivatives influence on oxygen electroreduction." Journal of Porphyrins and Phthalocyanines 19, no. 09 (2015): 1053–62. http://dx.doi.org/10.1142/s1088424615500807.

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The electrochemical and antioxidant properties of 5,10,15,20-tetrakis(3′-hydroxyphenyl)porphyrin ( H 2 T (m- OHPh ) P ) and 5,10,15,20-tetrakis(4′-hydroxyphenyl)porphyrin ( H 2 T (p- OHPh ) P ) were tested by the cyclic voltammetry (CV) method. It is shown that in dimethylsulfoxide (DMSO) the electroreduction processes of oxygen and porphyrins are under diffusion control. The electroreduction of H 2 T (m- OHPh ) P and H 2 T (p- OHPh ) P with potentials about -1 V are irreversible due to the chemical step (EC process) which leads to products with oxidation potentials about -0.5 V. Additionally

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9

BHYRAPPA, P., and K. S. SUSLICK. "Synthesis and Crystal Structure of 5,10,15,20-Tetrakis(3,5-dinitrophenyl)porphyrin." Journal of Porphyrins and Phthalocyanines 02, no. 05 (1998): 391–96. http://dx.doi.org/10.1002/(sici)1099-1409(199807/10)2:4/5<391::aid-jpp95>3.0.co;2-u.

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The synthesis, characterization and crystal structure of the octanitro-substituted porphyrin 5,10,15,20-tetrakis(3,5-dinitrophenyl)porphyrin, H 2 T (3,5- DNP ) P , are described. The solid state structure has two porphyrins in the unit cell with eight pyridine solvates and is made up from columnar arrays of the porphyrins. X-ray crystal structure data: monoclinic, space group P1 21/n1, a = 14.9996(9) Å, b = 8.2489(5) Å, c = 24.818(2) Å, α = 90 °, β = 104.172(1) °, γ = 90 °, V = 2977.3(3) Å3, dcalc = 1.440 g m-3, Z = 2.

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10

Ou, Zhongping, Wenbo E, Jianguo Shao, et al. "Electrochemical and spectroelectrochemical properties of building blocks for molecular arrays: reactions of quinoxalino[2,3-b]porphyrins containing metal(II) ions." Journal of Porphyrins and Phthalocyanines 09, no. 02 (2005): 142–51. http://dx.doi.org/10.1142/s1088424605000216.

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Quinoxalino[2,3-b]porphyrins are laterally-extended porphyrins with aromatic ring systems fused to the β,β'-positions of a pyrrolic ring of the macrocycle. They are building blocks for coplanar laterally-extended oligoporphyrins with applications in molecular electronics. The electrochemistry and spectroelectrochemistry of four such quinoxalinoporphyrins containing metal(II) ions and one free-base quinoxalinoporphyrin dissolved in nonaqueous media have been investigated and the data are compared to that seen for the same derivatives of the parent macrocycle lacking the fused quinoxaline ring.

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11

Hirakawa, Kazutaka, Shosuke Kawanishi, Hiroshi Segawa, and Toru Hirano. "Guanine-specific DNA oxidation photosensitized by the tetraphenylporphyrin P(V) complex." Journal of Porphyrins and Phthalocyanines 10, no. 11 (2006): 1285–92. http://dx.doi.org/10.1142/s108842460600065x.

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Porphyrins have been studied as photosensitizers in photodynamic therapy. DNA is one of the most important targets of the sensitizer. In the present study, we have examined the photosensitized DNA damage caused by dihydroxo P ( V ) tetraphenylporphyrin ( P ( V ) TPP ), a cationic water-soluble porphyrin. P ( V ) TPP photosensitized guanine-specific damage to the DNA fragment. P ( V ) TPP induced severe photodamage to single-stranded rather than to double-stranded DNA. High performance liquid chromatography measurements confirmed the formation of 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-G), a

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12

Chen, Jian, Ji-Ming Hu, Zhi-San Xu та Rong-Sheng Sheng. "Surface-Enhanced Resonance Raman Spectra Study of α,β,γ,δ-Tetra-(4-Trimethyl Ammonium Phenyl) Porphyrin". Applied Spectroscopy 47, № 3 (1993): 292–95. http://dx.doi.org/10.1366/0003702934066659.

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In the present study, surface-enhanced resonance Raman scattering (SERRS) spectra of α,β,γ,δ-tetra-(4-trimethyl ammonium phenyl) porphyrin [T(4-TAP)P] were obtained. With increasing pH, the relative intensities of the bands at 890 and 1244 cm−1 decreased. These bands were attributed to γ(C-H) and δ(Cm-phenyl), respectively. The bands at 420 and 576 cm−1, which were assigned to γ(phenyl-ring), were enhanced. The molecular symmetry of T(4-TAP)P is discussed in terms of group theory. The bands at 1554 and 1496 cm−1 could be attributed to the vibrational modes of the porphyrin macrocycle; the band

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13

Meshkov, Ivan N., Véronique Bulach, Yulia G. Gorbunova, et al. "Tuning photochemical properties of phosphorus(v) porphyrin photosensitizers." Chemical Communications 53, no. 71 (2017): 9918–21. http://dx.doi.org/10.1039/c7cc06052a.

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14

Noda, Sumio, Hideyuki Hosono, Ichiro Okura, Yasuhiko Yamamoto, and Yoshio Inoue. "Photoinduced electron transfer in viologen-linked porphyrins (p-PC n V)." Journal of the Chemical Society, Faraday Transactions 86, no. 5 (1990): 811. http://dx.doi.org/10.1039/ft9908600811.

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15

HALVORSEN, INGAR, ERIK STEENE та ABHIK GHOSH. "Resonance Raman marker bands of β-octahalogeno-meso-tetraarylmetalloporphyrins". Journal of Porphyrins and Phthalocyanines 05, № 10 (2001): 721–30. http://dx.doi.org/10.1002/jpp.378.

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Soret-excited resonance Raman (RR) spectra are reported for some 40 nonplanar metalloporphyrin complexes. These include (i) copper β-octabromo-meso-tetra(para-X-phenyl)porphyrins, Cu [ Br 8 T (p- X - P ) P ] ( X = CH 3, H , F , CF 3, NO 2); (ii) copper β-octachloro-meso-tetra(para-X-phenyl)porphyrins, Cu [ Cl 8 T (p- X - P ) P ] ( X = H , CF 3); (iii) zinc β-octabromo-meso-tetraphenylporphyrin, Zn [ Br 8 TPP ], and zinc β-octasubstituted meso-tetrakis(pentafluorophenyl)porphyrins, Zn [ Y 8 TPFPP ] ( Y = CH 3, Cl , Br ); (iv) nickel β-octabromo-meso-tetra(para-X-phenyl)porphyrins, Ni [ Br 8 T (

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16

Reddy, D. Raghunath, and Bhaskar G. Maiya. "Bis(aryloxo) derivatives of tin(IV) porphyrins: synthesis, spectroscopy and redox activity." Journal of Porphyrins and Phthalocyanines 06, no. 01 (2002): 3–11. http://dx.doi.org/10.1142/s1088424602000026.

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Spectroscopic, electrochemical and fluorescence properties of five octahedral tin(IV) porphyrins ([( TpTP ) Sn ( O -m,p- C 6 H 3( CH 3)2)2] (1), [( TpTP ) Sn ( O -p- C 6 H 4( CH 3))2] (2), [( TpTP ) Sn ( O - C 6 H 5)2] (3), [( TpTP ) Sn ( O -p- C 6 H 4 O -o,p- C 6 H 3( NO 2)2)2] (4) and [( TpTP ) Sn ( O -p- C 6 H 4( NO 2))2] (5)) bearing electron donating/electron withdrawing aryloxo subunits as the axial ligands are investigated in detail. These complexes have been synthesized by the reaction of 5,10,15,20-tetra(4-methylphenyl)porphyrinato tin(IV) dihydroxide ([( TpTP ) Sn ( OH )2]) and eithe

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17

Sălăgeanu, Luminița, Delia Muntean, Horhat Florin George, et al. "Antimicrobial activity of different substituted meso-porphyrin derivatives." Revista Romana de Medicina de Laborator 28, no. 2 (2020): 205–16. http://dx.doi.org/10.2478/rrlm-2020-0014.

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AbstractThe increasing resistance against classical antibiotic treatment forces the researchers to develop novel non-toxic antimicrobial agents. The aim of this study was to determine the antimicrobial properties of seven different porphyrins having distinctive hydrophobicity/hydrophilicity: P1 meso-tetra(4-methoxy-phenyl)porphyrin, P2 Zn(II)-meso-5,10,15,20-tetrapyridylporphyrin, P3 meso-tetra(p-tolyl)porphyrin, P4 5,10,15,20-tetraphenylporphyrin; P5 (5,10,15,20-tetraphenylporphinato) dichlorophosphorus(V) chloride, P6 5,10,15,20-tetrakis-(N-methyl-4-pyridyl) porphyrin-Zn(II) tetrachloride, P

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18

Hirakawa, Kazutaka, Yusuke Onishi, Dongyan Ouyang, Hiroaki Horiuchi, and Shigetoshi Okazaki. "pH-Dependent photodynamic activity of bis(6-methyl-3-pyridylmethoxy)P(V)tetrakis(p-methoxyphenyl)porphyrin." Chemical Physics Letters 746 (May 2020): 137315. http://dx.doi.org/10.1016/j.cplett.2020.137315.

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19

Shiragami, Tsutomu, Dai Onitsuka, Jin Matsumoto, and Masahide Yasuda. "Photocatalytic Oxidation of 2-Mercaptoethanol to Disulfide using Sb(V)-, P(V)-, and Ge(IV)-porphyrin Complexes." Rapid Communication in Photoscience 3, no. 4 (2014): 70–72. http://dx.doi.org/10.5857/rcp.2014.3.4.70.

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20

Lin, YH, YH Lin, SS Tang, et al. "Molecular-Structure of bis(ethane-1,2-diolato)( tetraphenylporphyrinato )phosphorus(V) chloride: [P( tpp )(OCH2CH2OH)2]+Cl -." Australian Journal of Chemistry 48, no. 7 (1995): 1367. http://dx.doi.org/10.1071/ch9951367.

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The structure of bis(ethane-1,2-diolato)( tetraphenylporphyrinato )phosphorus(V) chloride, [P( tpp )(OCH2CH2OH)2]+Cl -, has been confirmed by X-ray diffraction. The cation displays an octahedral coordination about the phosphorus atom and exhibits a ruffled porphyrin geometry with a core size of 1.841 Ǻ. It crystallizes in the orthorhombic space group P212121, with a 12.524(3), b 25.177(5), c 14.275(3) Ǻ, and Z = 4. Refinement based on 4194 observed reflections led to a final R value of 5.1%. The displacement of the phosphorus atom from the porphyrin mean plane is 0.014 Ǻ. The geometry around t

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21

Leung, Wa-Hung, Tom S. M. Hun, Kwok-Yin Wong, and Wing-Tak Wong. "Synthesis and electrochemistry of dialkylosmium-(IV) and -(V) porphyrins. Crystal structure of [Os(ttp)(CH2SiMe3)2][H2ttp = 5,10,15,20-tetra(p-tolyl)porphyrin]." Journal of the Chemical Society, Dalton Transactions, no. 18 (1994): 2713. http://dx.doi.org/10.1039/dt9940002713.

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22

BONNETT, RAYMOND, BIRGUL D. DJELAL, and ANGELINA NGUYEN. "Physical and chemical studies related to the development of m-THPC (FOSCAN®) for the photodynamic therapy (PDT) of tumours." Journal of Porphyrins and Phthalocyanines 05, no. 08 (2001): 652–61. http://dx.doi.org/10.1002/jpp.377.

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Aggregation of 5,10,15,20-tetrakis(m-hydroxyphenyl)chlorin (m-THPC) is observed not to occur in methanol or in ethanol:polyethyleneglycol 300:water = 2:3:5 (v/v) in the concentration range of 0.46–73.4 × 10-5 M and 0.92–29.4 × 10-5 M , respectively. However, aggregation occurs for 4.59 × 10-5 M solutions in methanol–water mixtures for compositions >50% water (v/v). The Soret band broadens and ε max decreases; λ max shows a red shift, consistent with a J-type structure. Possible aggregate structures are considered based on the known hydrogen bonding patterns in crystalline solvates of the cl

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23

Lysenko, Andrey B., Vladimir L. Malinovskii, Kisari Padmaja, et al. "Multistate molecular information storage using S-acetylthio-derivatized dyads of triple-decker sandwich coordination compounds." Journal of Porphyrins and Phthalocyanines 09, no. 07 (2005): 491–508. http://dx.doi.org/10.1142/s1088424605000617.

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An approach toward molecular information storage employs redox-active molecules attached to an electroactive surface. The chief advantages of such molecular capacitors include higher charge density and more versatile synthetic design than is afforded by typical semiconductor charge-storage materials. An architecture containing two triple-decker sandwich coordination complexes and an S-acetylthiomethyl-terminated tether has been designed for multibit storage. Each triple decker is composed of two phthalocyanines, one porphyrin, and two europium atoms. The oxidation potentials of each triple dec

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24

Kuvshinova, Elizaveta M., Maria A. Bykova, Irina A. Vershinina, Olga V. Gornukhina, Tatyana V. Lyubimova, and Alexander S. Semeikin. "SYNTHESIS AND COORDINATION PROPERTIES OF COBALT COMPLEXES OF 5-PHENYL-2,3,7,8,12,18-HEXAMETHYL-13,17-DIETHYLPORPHYRIN AND ITS NITRO-SUBSTITUTED IN ORGANIC SOLVENTS." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 7 (2018): 44. http://dx.doi.org/10.6060/ivkkt.20186107.5843.

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5-Phenyl-2,3,7,8,12,18-hexamethyl-13,17-diethylporphyrin (1), 5-phenyl-10,20-dinitro-2,3,7,8,12,18-hexamethyl -13,17-diethylporphyrin (2), 5- (p-nitrophenyl) -2,3,7,8,12,18-hexamethyl-13,17-diethylporphyrin (3) weresynthesized. The kinetics of formation and dissociation of their cobalt complexes in pyridine and acetic acid was studied. It was found that the change in reactivity upon transition from porphyrin 1 to 2 during complexation in acetic acid is due to an increase in the degree of deformation of the tetrapyrrole aromatic nucleus and the electronic effect of nitro groups. This is manifes

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25

Pechnikova, Nadezhda L., Tatiana A. Ageeva, Oskar I. Koifman, Elena V. Alopina, and Oleg Yu Кuznetsov. "SYNTHESIS AND STUDY OF ANTIBACTERIAL ACTIVITY OF BROMINE DERIVATIVES OF PORHYRIN POLYMERS AND THEIR ZINC COMPLEXES." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 2 (2017): 52. http://dx.doi.org/10.6060/tcct.2017602.5404.

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A creation of new water-soluble porphyrin-polymers having antibacterial properties is actual today because these substances can be used in a medicine and pharmacology. Therefore, the aim of this work is to obtain a water-soluble polyvinyl alcohol-based immobilizates containing dibromo-derivatives of meso-aryl porphyrins in a side chain of the polymer and the study of their bacterial activity towards Escherichia coli ATCC 25922, Candida albicans ATCC 885-653, Staphylococcus aureus ATCC 653. The bromination of 2-formyl-5,10,15,20-tetraphenylporphyrin and its zinc (II) complexes in the phenyl rin

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26

Hirakawa, Kazutaka, Ayaka Suzuki, Dongyan Ouyang, et al. "Controlled Photodynamic Action of Axial Fluorinated DiethoxyP(V)tetrakis(p-methoxyphenyl)porphyrin through Self-Aggregation." Chemical Research in Toxicology 32, no. 8 (2019): 1638–45. http://dx.doi.org/10.1021/acs.chemrestox.9b00172.

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27

Volz, Heinrich, and Thomas Barth. "Cytochrom-P-450-Modellreaktionen. - Isolierung und Charakterisierung von Mangan(IV)- und Mangan(V)-Porphyrin-Komplexen." Liebigs Annalen der Chemie 1989, no. 2 (1989): 171–75. http://dx.doi.org/10.1002/jlac.198919890133.

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28

Jou, Jeng-Yi, Chih-Hao Chang, Gene-Hsiang Lee, et al. "Electrochemical and resonance Raman studies of nitridomanganese(V) porphyrins in nonaqueous solution." Journal of Porphyrins and Phthalocyanines 07, no. 10 (2003): 674–81. http://dx.doi.org/10.1142/s1088424603000847.

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The UV-vis spectral, electrochemical and resonance Raman data of [meso-tetrakis(4-pyridyl)porphyrinato]nitridomanganese(V), MnN(TPyP) , were investigated. MnN(TTP) (where ( TTP )2− = dianion of meso-tetrakis(p-tolyl)porphyrin) and MnN(OEP) (where ( OEP )2− = dianion of 2,3,7,8,12,13,17,18-octaethylporphyrin) were also examined in comparison. Cyclic voltammetry of MnN ( TPyP ) showed an irreversible oxidation wave at +1.22 V and two redox couples at −1.05 and −1.40 V vs. Ag / AgCl , respectively. According to spectroelectrochemical studies, the first and the second reductions involved formation

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29

Perrin, Mickael L., Christian A. Martin, Ferry Prins, et al. "Charge transport in a zinc–porphyrin single-molecule junction." Beilstein Journal of Nanotechnology 2 (October 18, 2011): 714–19. http://dx.doi.org/10.3762/bjnano.2.77.

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We have investigated charge transport in ZnTPPdT–Pyr (TPPdT: 5,15-di(p-thiolphenyl)-10,20-di(p-tolyl)porphyrin) molecular junctions using the lithographic mechanically controllable break-junction (MCBJ) technique at room temperature and cryogenic temperature (6 K). We combined low-bias statistical measurements with spectroscopy of the molecular levels in the form of I(V) characteristics. This combination allows us to characterize the transport in a molecular junction in detail. This complex molecule can form different junction configurations, having an observable effect on the trace histograms

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30

Tesakova, Mariya V., Sergey M. Kuzmin, and Vladimir I. Parfenyuk. "An electrochemical quartz crystal microbalance study of 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin electropolymerization process." Journal of Porphyrins and Phthalocyanines 23, no. 11n12 (2019): 1495–504. http://dx.doi.org/10.1142/s1088424619501657.

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The process of 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin electropolymerization has been studied by the quartz crystal microbalance method in different electrodeposition conditions. The films were deposited in two modes: in potentiostatic conditions (at the potential of [Formula: see text]2 V) and in potentiodynamic conditions (CV with the potential scan rate of 20 mV/s). The effect of electrolysis parameters on 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin electropolymerization has been studied by obtaining films in two modes and using two supporting electrolytes: tetrabutylammonium perchl

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31

Guo, Can-Cheng, Tie-Gang Ren, Jian-Xin Song, et al. "Substituted tetrapyrazolylporphyrins: application in organic light-emitting diodes." Journal of Porphyrins and Phthalocyanines 09, no. 12 (2005): 830–34. http://dx.doi.org/10.1142/s1088424605000940.

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Six substituted tetrapyrazolylporphyrins ( TAPyPH 2), meso-tetrakis(1-phenylpyrazol-4-yl)porphyrin ( TPPyPH 2), meso-tetrakis[1-(p-tolyl)pyrazol-4-yl] porphyrin ((p- CH 3) TPPyPH 2), meso-tetrakis[1-(p-methoxyphenyl)pyrazol-4-yl]porphyrin ((p- CH 3 O ) TPPyPH 2), meso-tetrakis[1-(p-chlorophenyl) pyrazol-4-yl]porphyrin ((p- Cl ) TPPyPH 2), meso-tetrakis[1-(p-bromophenyl)pyrazol-4-yl]porphyrin ((p- Br ) TPPyPH 2) and meso-tetrakis[1-(m-tolyl)pyrazol-4-yl]porphyrin ((m- CH 3) TPPyPH 2), were synthesized by the condensation of pyrrole with the corresponding substituted formylpyrazole and used as t

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32

Reeta, P. Silviya, Adis Khetubol, Tejaswi Jella та ін. "Photophysical properties of Sn(IV)tetraphenylporphyrin-pyrene dyad with a β-vinyl linker". Journal of Porphyrins and Phthalocyanines 19, № 01-03 (2015): 288–300. http://dx.doi.org/10.1142/s1088424615500108.

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A Sn (IV)tetraphenylporphyrin (T) has been functionalized with a β-vinyl pyrene (P) and the photophysical properties of the formed dyad (T-P) with its corresponding precursors were studied in three solvents with different polarities using steady-state and time-resolved measurements in ps and fs timescales. When the pyrene moiety is excited at λex = 340 nm, the fluorescence spectroscopy experiments indicate in all the studied solvents, an efficient quenching of the pyrene emission. When excited at either λex = 340 nm or λex = 405 nm, where porphyrin absorbs, a new emissive excited state complex

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33

Premovic, Pavle. "Cretaceous-Tertiary boundary deposits in Denmark: A diachroneity." Journal of the Serbian Chemical Society 69, no. 7 (2004): 555–61. http://dx.doi.org/10.2298/jsc0407555p.

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The lateral distribution of predominantly terrestrial kerogen or humics enriched with copper(II) porphyrins (Cu-P) across the Danish marine basin implies that the alleged Cretaceous-Tertiary (KT) boundary deposits in western Denmark (at the Nye Kl?v/Dania locations)were probably formed by erosion/emplacement of the boundary clay (Fiskeler) in eastern Denmark by marine currents, as originally proposed by Hulteberg.1,2.

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34

Thamilarasan, Madhan, Rodolfo Estupinan, and Rahima Zennadi. "Mn Porphyrin-Based Redox Active Drugs Improve Anemia and Reduce Organ Damage in a Murine Model of Sickle Cell Disease." Blood 134, Supplement_1 (2019): 2255. http://dx.doi.org/10.1182/blood-2019-131140.

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Sickle cell disease (SCD) is caused by a point mutation in the β-globin gene that leads to devastating downstream consequences including chronic hemolytic anemia, episodic vascular occlusion, and cumulative oxidative organ damage resulting in death. Targeting the mechanisms leading to organ injury could bring out therapeutic approaches. Sickle red blood cell (RBC) oxidative damage, which leads to hemolysis, could participate in endothelial activation and organ damage. Recently, we show that NADPH oxidases (NOXs) are a major player in generating reactive oxygen species (ROS) within sickle RBCs

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35

Short, Melanie A., Roger D. Sommer, Alec J. Falzone, Tao Huang, Walter W. Weare, and Jennifer L. Roizen. "A five-coordinate iron(III) porphyrin complex including a neutral axial pyridine N-oxide ligand." Acta Crystallographica Section C Structural Chemistry 75, no. 6 (2019): 717–22. http://dx.doi.org/10.1107/s2053229619005849.

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While six-coordinate iron(III) porphyrin complexes with pyridine N-oxides as axial ligands have been studied as they exhibit rare spin-crossover behavior, studies of five-coordinate iron(III) porphyrin complexes including neutral axial ligands are rare. A five-coordinate pyridine N-oxide–5,10,15,20-tetraphenylporphyrinate–iron(III) complex, namely (pyridine N-oxide-κO)(5,10,15,20-tetraphenylporphinato-κ4 N,N′,N′′,N′′′)iron(III) hexafluoroantimonate(V) dichloromethane disolvate, [Fe(C44H28N4)(C5H5NO)][SbF6]·2CH2Cl2, was isolated and its crystal structure determined in the space group P\overline

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Zobi, Fabio, and Dennis V. Stynes. "Hetero trinuclear oxo-bridged complexes of ruthenium porphyrin and iron phthalocyanine." Canadian Journal of Chemistry 79, no. 5-6 (2001): 795–801. http://dx.doi.org/10.1139/v00-180.

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New diamagnetic hetero bi- and trinuclear oxo-bridged metal complexes of formula (L)(Pc)Fe-O-Ru(TPP')(O) and (L)(Pc)Fe-O-Ru(TPP')-O-Fe(Pc)(L) have been prepared from Ru(TPP')(O)2 and Fe(Pc)(L)2 (TPP' = tetrakis(4-methoxyphenyl)porphyrinate, Pc = phthalocyanate ion, L = monodentate ligand). The trinuclear complex binds a variety of ligands (4,4'-bipy, 4-MePy, P(OEt)3, pip, NH3, 1-MeIm, P(Me)2Ph) trans to the oxo-bridge. 1H NMR spectra are characterized by large ring current shifts (rcs) due to the TPP' and Pc ions. The complexes show an unusually weak Pc Q band in their visible spectra at 700 n

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37

Mlakić, Milena, Anita Šalić, Matea Bačić, et al. "Photocatalytic Oxygenation of Heterostilbenes—Batch versus Microflow Reactor." Catalysts 11, no. 3 (2021): 395. http://dx.doi.org/10.3390/catal11030395.

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On the basis of earlier results with furan and thiophene derivatives of benzobicyclo[3.2.1]octadiene, photocatalytic oxygenation of novel furo- and thieno heterostilbenes with water-soluble manganese(III) porphyrins offered suitable possibilities to study their reactivities and reaction pathways depending on the heteroatom and the catalyst charge. The experiments were carried out in two reactors types (batch and microflow) to investigate the geometric effects. NMR spectroscopy, GC, and UPLC/MS analyses were applied for identification and quantification of the products. As our results indicated

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38

Pukhovskaya, Svetlana G., Yulia B. Ivanova, Dmitry A. Erzunov, Aleksander S. Semeykin та Sergei A. Syrbu. "SYNTHESIS, COORDINATION AND ACID-BASE PROPERTIES OF MESO-DINITROSUBSTITUTED DERIVATIVES OF 5,15-DIPHENYL-β-OCTAALKYLPORPHINE". IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, № 6 (2018): 17. http://dx.doi.org/10.6060/tcct.20186106.5655.

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Presented work shows results of synthesis and spectrophotometric researches on properties of meso-dinitrosubstituted derivatives of 5,15-diphenyl-β-octaalkylporphyrin nitroderivatives in comparison with 2,8,12,18,3,7,13,17-octaethylporphyrin and 2,3,7,8,12,13,17,18-octaethyl-5,15-dinitroporphyrin. The method of spectrophotometric titration with perchloric acid (for determining the basicity constant) and 1,8-diazabicyclo [5.4.0] undec-7-ene (DBU) was used in order to study the acid-base properties of porphyrins, namely to determine the acidity constant. The spectral characteristics of the ioniz

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Hirakawa, Kazutaka, Dongyan Ouyang, Yuko Ibuki, et al. "Photosensitized Protein-Damaging Activity, Cytotoxicity, and Antitumor Effects of P(V)porphyrins Using Long-Wavelength Visible Light through Electron Transfer." Chemical Research in Toxicology 31, no. 5 (2018): 371–79. http://dx.doi.org/10.1021/acs.chemrestox.8b00059.

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EL HADKI, Hamza, Mohammed Salah, Abdallah Zrineh, et al. "Spectral characteristics and DFT Study of vanadyl octaethylporphyrin complex." Mediterranean Journal of Chemistry 8, no. 2 (2019): 132. http://dx.doi.org/10.13171/10.13171/mjc8219043008heh.

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<p>The chemistry of vanadyl porphyrins has been explored using vanadyl octaethylporphyrin as a substance in petroleum porphyrins, crude oils and bitumen. The structural, electronic, thermodynamic, spectroscopic properties are described. The geometry’s optimization of this molecule was done by Density Functional Theory (DFT) using the hybrid Beck three-parameter hybrid functional combined with Lee-Yang-Parr correlation functional (B3LYP) and 6-31G(d) standard basis set. All calculations have been made in the gas phase and in different solvents: benzene, benzonitrile, tetrachloromethane an

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41

Henderson, D. P., E. E. Wyckoff, C. E. Rashidi, H. Verlei, and A. L. Oldham. "Characterization of the Plesiomonas shigelloides Genes Encoding the Heme Iron Utilization System." Journal of Bacteriology 183, no. 9 (2001): 2715–23. http://dx.doi.org/10.1128/jb.183.9.2715-2723.2001.

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ABSTRACT Plesiomonas shigelloides is a gram-negative pathogen which can utilize heme as an iron source. In previous work, P. shigelloides genes which permitted heme iron utilization in a laboratory strain of Escherichia coli were isolated. In the present study, the cloned P. shigelloides sequences were found to encode ten potential heme utilization proteins: HugA, the putative heme receptor; TonB and ExbBD; HugB, the putative periplasmic binding protein; HugCD, the putative inner membrane permease; and the proteins HugW, HugX, and HugZ. Three of the genes, hugA, hugZ, and tonB, contain a Fur b

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42

Ucoski, Geani Maria, Shirley Nakagaki, and Fábio Souza Nunes. "Electrochemistry and spectroelectrochemistry of 5,10,15,20-tetrakis(1,3-benzodioxole) porphyrin and its manganese and iron complexes." Journal of Porphyrins and Phthalocyanines 18, no. 12 (2014): 1093–100. http://dx.doi.org/10.1142/s1088424614500473.

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Cyclic voltammetry and thin-layer spectroelectrochemical properties of the free base 5,10,15,20-tetrakis(1,3-benzodioxole)porphyrin ( H 2 P ), and its manganese and iron complexes ( MnP and FeP , respectively) were studied in dichloromethane with tetra-butyl ammonium hexafluorophosphate (TBAPF6) as supporting electrolyte. The free base undergoes two monoelectronic oxidations at +0.71 and +0.96 V vs. Ag / Ag +, corresponding to the formations of the π-cation radical and dication. Two reductions were observed at -1.53 and -1.87 V corresponding to the formation of π-anion and dianion species. The

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43

Berezina, Nadezhda M., Do Ngoc Minh, Mikhail I. Bazanov, Aleksandr S. Semeikin, and Aleksandra A. Maksimova. "SYNTHESIS AND ELECTROCHEMICAL CHARACTERISTICS OF Fe (III)-ETIO PORPHYRIN II AND ITS 5,15-BIS(PYRID-3-YL) DERIVATIVE." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 2 (2018): 29. http://dx.doi.org/10.6060/tcct.20186102.5652.

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In this work acetato(3,7,13,17-tetramethyl-2,8,12,18-tetraethylporphinato)iron(III) [(AcO)FeTMeTEtP] and acetato[5,15-bis(pyrid-3-yl)-3,7,13,17-tetramethyl-2,8,12,18-tetraethylporphinato)iron(III) [(OAc)OFe(Py-3)2TMeTEtP] have been synthesized and characterized. Electrochemical properties and electrocatalytic activity of complexes in oxygen electroreduction reaction in 0.1M KOH aqueous solution were studied by the cyclic voltammetry. The comparative analysis of the effect of complex formation, as well as functional substitution in the molecule (the introduction of one or two pyridyl fragments

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44

Plotnikova, Anna O., Yulia B. Ivanova, and Nugzar Zh Mamardashvili. "INVESTIGATION OF COORDINATION PROPERTIES OF 5,10,15,20-TETRA(4-OH-PHENYL) PORPHYRIN IN ACETONITRILE AND DIMETHYLFORMAMIDE." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 6 (2017): 65. http://dx.doi.org/10.6060/tcct.2017606.5550.

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In the present work the reactions of basic interaction of 5,10,15,20-tetra(4-OH-phenyl) porphyrin in acetonitrile with the perchloric acid are studied by the method of spectrophotometric titration. And the chemical kinetics of ligand with zinc acetate in the dimethylformamide was carried out. The constant of the basic dissociation of the protonated acids of 5,10,15,20-tetra(4-OH-phenyl) porphyrin and kinetic parameters of the reaction of the formation of the zinc complex was obtained. The comparative analysis of our own obtained data and literature data according to the basic and coordination

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45

Garrison, J. Mark, and Thomas C. Bruice. "Intermediates in the epoxidation of alkenes by cytochrome P-450 models. 3. Mechanism of oxygen transfer from substituted oxochromium(V) porphyrins to olefinic substrates." Journal of the American Chemical Society 111, no. 1 (1989): 191–98. http://dx.doi.org/10.1021/ja00183a030.

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46

Nasirov R.,, Kuspanova B.,, Kalauova A.S.,, and Satenov K.G.,. "BINDING d-ELEMENT OF THE 4TH PERIOD OF V-GROUP OF THE PERIODIC SYSTEM OF D.I. MENDELEYEV AND ITS PARAMAGNETIC PROPERTIES." SERIES CHEMISTRY AND TECHNOLOGY 5, no. 443 (2020): 92–98. http://dx.doi.org/10.32014/2020.2518-1491.85.

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Vanadium is a connecting element between the main subgroup VA and the subgroup VB. In the opinion of B.V. Nekrasov, if we compare the VВ group of vanadium elements with the valence states of P and Аs VА main subgroup, then in the oxidation states of -3, 0, +3 arsenic is an analogue of phosphorus, and in the oxidation state +5, it will not be an analogue of phosphorus. In contrast, in the low oxidation degrees of vanadium, it differs from phosphorus, and in the oxidation state of +5 vanadium is not a complete analogue of phosphorus. The similarity of the electronic configuration of atoms for va

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47

Wang, Degao, Michael S. Eberhart, Matthew V. Sheridan, et al. "Stabilized photoanodes for water oxidation by integration of organic dyes, water oxidation catalysts, and electron-transfer mediators." Proceedings of the National Academy of Sciences 115, no. 34 (2018): 8523–28. http://dx.doi.org/10.1073/pnas.1802903115.

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Stabilized photoanodes for light-driven water oxidation have been prepared on nanoparticle core/shell electrodes with surface-stabilized donor–acceptor chromophores, a water oxidation catalyst, and an electron-transfer mediator. For the electrode, fluorine-doped tin oxide FTO|SnO2/TiO2|-Org1-|1.1 nm Al2O3|-RuP2+-WOC (water oxidation catalyst) with Org1 (1-cyano-2-(4-(diphenylamino)phenyl)vinyl)phosphonic acid), the mediator RuP2+ ([Ru(4,4-(PO3H2)2-2,2-bipyridine)(2,2-bipyridine)2]2+), and the WOC, Ru(bda)(py(CH2)(3or10)P(O3H)2)2 (bda is 2,2-bipyridine-6,6-dicarboxylate with x = 3 or 10), solar

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48

Hepple, Russell T., Richard A. Howlett, Casey A. Kindig, Creed M. Stary, and Michael C. Hogan. "The O2 cost of the tension-time integral in isolated single myocytes during fatigue." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 298, no. 4 (2010): R983—R988. http://dx.doi.org/10.1152/ajpregu.00715.2009.

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One proposed explanation for the V̇o2 slow component is that lower-threshold motor units may fatigue and develop little or no tension but continue to use O2, thereby resulting in a dissociation of cellular respiration from force generation. The present study used intact isolated single myocytes with differing fatigue resistance profiles to investigate the relationship between fatigue, tension development, and aerobic metabolism. Single Xenopus skeletal muscle myofibers were allocated to a fast-fatiguing (FF) or a slow-fatiguing (SF) group, based on the contraction frequency required to elicit

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49

Tanaka, Yuya, Masanori Ono, and Munetaka Akita. "Synthesis and wire-like performance of diruthenium molecular wire with a C≡C-porphyrin-C≡C linker." Journal of Porphyrins and Phthalocyanines 19, no. 01-03 (2015): 442–50. http://dx.doi.org/10.1142/s1088424615500352.

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A diruthenium complex with a free-base porphyrin linker 1 is synthesized and characterized by 1 H and 31 P NMR, IR, and ESI-TOF-MS spectroscopy. A cyclic voltammogram of 1 shows two reversible waves attributed to the redox processes at the ruthenium centers, and a compropotionation constant (K C ) has been determined to be 1.8 × 105, indicating that a mixed valence state of 1+ is thermodynamically stable. The monocationic complex 1+ obtained by chemical oxidation of 1 by [ Cp 2 Fe ] PF 6 shows an intervalence charge transfer (IVCT) band in the NIR region. On the basis of the electronic couplin

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ZHAO, FENG, JIAN ZHANG, TOSHIYUKI ABE, and MASAO KANEKO. "Electron Transfer in the Reduction of Cobalt Porphyrin Incorporated into Nafion and Poly(4-vinylpyridine-co-styrene) Films." Journal of Porphyrins and Phthalocyanines 03, no. 03 (1999): 238–46. http://dx.doi.org/10.1002/(sici)1099-1409(199903)3:3<238::aid-jpp128>3.0.co;2-v.

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Potential step chronoamperospectrometry (PSCAS) measurement was carried out to investigate the one-electron transfer in the reduction of tetraphenylporphyrin cobalt(III) ([ Co III TPP (−2)]+) incorporated into a Nafion or poly(4-vinylpyridine-co-styrene) (P(VP-St)) film coated on an ITO electrode. The electron transfer of the redox centers in the two systems occurred by a physical diffusion mechanism. The fraction of the electroactive complex (R ct ) was independent of the CoTPP concentration in P(VP-St) but decreased with increasing CoTPP concentration in Nafion, especially at high concentrat

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