Relevant bibliographies by topics / Hemiporphyrazines

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  2. Dissertations / Theses
  3. Book chapters

Academic literature on the topic 'Hemiporphyrazines'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Hemiporphyrazines"

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Hahn, Uwe, and M. Salomé Rodríguez-Morgade. "Triazolehemiporphyrazines: azaporphyrins with intrinsic low symmetry." Journal of Porphyrins and Phthalocyanines 13, no. 04n05 (April 2009): 455–60. http://dx.doi.org/10.1142/s1088424609000644.

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This highlight gives a brief summary of recent developments in the chemistry of hemiporphyrazines in the Iberian Peninsula, with a focus on triazolehemiporphyrazines. Among all porphyrinoids, hemiporphyrazines offer the advantage of exhibiting intrinsic D 2h symmetry and this feature has been exploited in the design of materials endowed with a variety of properties such as liquid crystalline behavior, electric and magnetic features and nonlinear optical performance, among others.
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Huber, Sabrina M., Martin S. Seyfried, Anthony Linden, and Nathan W. Luedtke. "Excitonic Luminescence of Hemiporphyrazines." Inorganic Chemistry 51, no. 13 (June 15, 2012): 7032–38. http://dx.doi.org/10.1021/ic2017566.

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Schrage, Briana R., Kullapa Chanawanno, Laura A. Crandall, and Christopher J. Ziegler. "The synthesis of a hexameric expanded hemiporphyrazine." Journal of Porphyrins and Phthalocyanines 24, no. 01n03 (January 2020): 129–34. http://dx.doi.org/10.1142/s1088424619500901.

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Although the chemistry of expanded porphyrins is well developed, there has been significantly less work on expanded isoindoline based macrocycles such as hemiporphyrazines. In this report we present the synthesis and characterization of a new hexameric expanded hemiporphyrazine which we refer to as hexahemiporphyrazine. The synthesis incorporated bis(6-amino-2-pyridyl)amine as a starting material, which could be produced from 2,6-diaminopyridine using melt reaction conditions. Bis(6-amino-2-pyridyl)amine can adopt a three different conformations, two of which are observed in the free base and protonated form, and the third in the backbone of hexahemiporphyrazine. Reaction of bis(6-amino-2-pyridyl)amine and diiminoisoindoline in the presence of a catalytic amount of BF3 produces the hexihemiporphyrazine macrocycle, which was characterized spectroscopically and by X-ray crystallography. Structure elucidation reveals two inverted pyridine rings in a configuration reminiscent of that seen in hexaphyrin, however hexahemiporphyrazine lacks cross conjugation across the macrocycle.
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Kuznetsova, Aleksandra S., Nadezhda L. Pechnikova, Yuriy A. Zhabanov, Aleksey E. Khochenkov, Oscar I. Koifman, Victor V. Aleksandriiskii, and Mikhail K. Islyaikin. "Microwave-assisted synthesis and sublimation enthalpies of hemiporphyrazines." Journal of Porphyrins and Phthalocyanines 23, no. 03 (March 2019): 296–302. http://dx.doi.org/10.1142/s1088424619500263.

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It was established that microwave irradiation solvent-free processing of 2,6- diaminopyridine or 1,3-phenylenediamine with phthalonitrile or 4-tert-butylphthalonitrile led to corresponding hemiporphyrazines with sufficiently high yields and a huge reduction in the time required for synthesis, from 8–12 h to 20 min. The data of IR and UV-vis spectroscopies and elemental analysis of the final products were found to be similar to those described in literature. The obtained hemiporphyrazines were characterized by 1H and [Formula: see text]C NMR data. We applied the Knudsen effusion method with mass spectrometric control of vapor composition. The mass spectrometric investigations established that the macrocyclic compounds give a stable stream of particles and their enthalpies of sublimation were estimated by the second law of thermodynamics.
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Sripothongnak, Saovalak, Anna M. Pischera, Matthew P. Espe, William S. Durfee, and Christopher J. Ziegler. "Synthesis and Characterization of Lithium Hemiporphyrazines." Inorganic Chemistry 48, no. 4 (February 16, 2009): 1293–300. http://dx.doi.org/10.1021/ic800817x.

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Muranaka, Atsuya, Fumiko Kyotani, Xingmei Ouyang, Daisuke Hashizume, and Masanobu Uchiyama. "Synthesis and properties of palladium(II) complexes of aromatic hemiporphyrazines." Journal of Porphyrins and Phthalocyanines 18, no. 10n11 (October 2014): 869–74. http://dx.doi.org/10.1142/s1088424614500667.

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Palladium(II) complexes of aromatic hemiporphyrazines were prepared by the reaction of bis(dibenzylideneacetone)palladium(0) with the corresponding metal-free macrocycles. Single crystal X-ray analysis revealed that a palladium(II) ion was coordinated inside the macrocyclic cavity to form two Pd – C bonds. Electronic properties of the metalloorganic compounds were characterized by NMR, UV-vis-NIR, and magnetic circular dichroism (MCD) spectroscopy.
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7

Rack, Michael, Bernd Hauschel, and Michael Hanack. "Nickel Hemiporphyrazines as Bisdienes and Bisdienophiles: Synthesis and Characterization." Chemische Berichte 129, no. 2 (February 1996): 237–42. http://dx.doi.org/10.1002/cber.19961290220.

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Tanaka, Yusuke, Tomotaka Murayama, Atsuya Muranaka, Eiyu Imai, and Masanobu Uchiyama. "Ring‐Opened Hemiporphyrazines: Helical Molecules Exhibiting Circularly Polarized Luminescence." Chemistry – A European Journal 26, no. 8 (January 30, 2020): 1768–71. http://dx.doi.org/10.1002/chem.201905246.

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9

Dini, Danilo, Mario J. F. Calvete, Michael Hanack, Vincenzo Amendola, and Moreno Meneghetti. "Large Two-Photon Absorption Cross Sections of Hemiporphyrazines in the Excited State: The Multiphoton Absorption Process of Hemiporphyrazines with Different Central Metals." Journal of the American Chemical Society 130, no. 37 (September 17, 2008): 12290–98. http://dx.doi.org/10.1021/ja802678u.

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10

Hauschel, Bernd, Detlef Ruff, and Michael Hanack. "A novel route to ladder-type structures based on hemiporphyrazines." Journal of the Chemical Society, Chemical Communications, no. 23 (1995): 2449. http://dx.doi.org/10.1039/c39950002449.

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Dissertations / Theses on the topic "Hemiporphyrazines"

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Britton, Jonathan. "Nonlinear optical studies of metallophtalocyanines and hemiporphyrazines in solution." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1011608.

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This thesis presents the study of the effects of CdTe-TGA quantum dots (QDs) on optical limiting ability of different phthalocyanine (Pc) complexes (5-12) containing Zn, Ga, In central metals and substituted with benzyloxyphenoxy, phenoxy, tertbutylphenoxy and amino groups in solution and in poly (methyl methacrylate) (PMMA) films. The optical limiting parameters of Pcs were higher for tertbutylphenoxy when compared to benzyloxyphenoxy and phenoxy substituents, in DMSO. Non-peripheral substitution decreased the optical limiting parameters. Third-order susceptibility (Im[χ⁽³⁾]/α) values of Pcs in the absence and presence of CdTe QDs were in the 10⁻¹² to 10⁻¹° esu cm range. Hyperpolarizabilities (γ) ranged from 10⁻³¹ to 10⁻²⁹ esu L for Pc alone or in mixture with QDs. The effect on the optical limiting abilities of twelve embedded phthalocyanines containing In, Ga, Zn and Al as central metals in polymer thin films was also examined. The effect of forming a covalent link zinc tetraamino phthalocyanine (12) with poly (methyl acrylic acid) (PMAA) and Zn (13) and OHAl (14) octacarboxy phthalocyanines to polyethylenimine (PEI) was also studied. The hyperpolarizability of the twelve phthalocyanines in polymer was found to be in the range of 10⁻²⁶ to 10⁻²⁴ esu.L. This is significantly higher than the hyperpolarizabilities of these phthalocyanines in solution. Non-linear optical (NLO) parameters were determined for phthalocyanine complexes containing In, Ga and Zn as central metals when embedded in PMMA polymer in the presence of quantum dots (QDs). The QDs mainly employed were CdTe-TGA (TGA = thioglylcolic acid). Triplet lifetimes increased as k (excited state (σex) to ground state (σg) absorption cross section ratio) values decreased with the addition of the CdTe-TGA to the phthalocyanines. The saturation energy density (Fsat) values were smaller in the films when compared to the solutions. Complex 7 tetrasubstituted with tert-butylphenoxy groups at non-peripheral positions was also studied in the presence of CdS-TGA, CdSe-TGA, fullerenes and single walled carbon nanotubes. There is a general improvement in optical limiting ability of Pc complexes in the presence of nanomaterials (NMs). Degradation studies seem to indicate that placing a phthalocyanine within a polymer thin film may protect it slightly from photo- and thermal degradation. 3(4), 15(16)-Bis-(4 -tert-butyl-phenoxy)-10, 22-diaminohemiporphyrazinato chloroindium hemiporphyrazine was synthesized from 1, 3, 5-triaminobenzene and 4-tert-butyl-phenoxyisoindoline. The structure of the complex was confirmed using mass, nuclear magnetic resonance and infrared spectroscopies. The nonlinear parameters of the compound was also analyzed in dimethylformamide and found to be significantly greater than previously analyzed phthalocyanines.
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Sripothongnak, Saovalak. "The Metal Binding Chemistry of the Carbahemiporphyrazines." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1273694085.

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3

Cetin, Anil. "TRANSITION METAL COMPLEXES OF PORPHYRIN ANALOGS AND BORATE-BASED COORDINATION COMPLEXES." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1176390111.

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Book chapters on the topic "Hemiporphyrazines"

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Ziegler, Christopher J. "77 The Hemiporphyrazines and Related Systems." In Handbook of Porphyrin Science (Volume 17), 113–238. World Scientific Publishing Company, 2012. http://dx.doi.org/10.1142/9789814335508_0004.

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Journal articles
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