Absorption Spectra and Photophysical Properties of a Series of Polypyridine Ligands Containing Appended Pyrenyl and Anthryl Chromophores and of Their Ruthenium(II) and Osmium(II) Complexes

2003 ◽  
Vol 107 (4) ◽  
pp. 447-455 ◽  
Author(s):  
Béatrice Maubert ◽  
Nathan D. McClenaghan ◽  
Maria Teresa Indelli ◽  
Sebastiano Campagna
Keyword(s):  
Absorption Spectra ◽  
Photophysical Properties ◽  
Polypyridine Ligands

scholarly journals Iridium(iii) complexes with polypyridine ligands coordinated as N-heterocyclic carbenes. Synthesis, structure and photophysical properties

2012 ◽  
Vol 41 (46) ◽  
pp. 14126 ◽  
Author(s):  
Salvador Conejero ◽  
Celia Maya ◽  
Margarita Paneque ◽  
Ana Petronilho ◽  
Manuel L. Poveda ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Heterocyclic Carbenes ◽  
Polypyridine Ligands

Pyrimidyl-substituted anthracene fluorophores: Syntheses, absorption spectra, and photophysical properties

2018 ◽  
Vol 159 ◽  
pp. 619-636 ◽  
Author(s):  
Antonio Santoro ◽  
Fabien Tuyèras ◽  
Grégory Dupeyre ◽  
Philippe P. Lainé ◽  
Ilaria Ciofini ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Photophysical Properties

Photophysical Properties of Some Quindoline Bases and their Salts

1991 ◽  
Vol 46 (9) ◽  
pp. 819-822
Author(s):  
Peter Nikolov ◽  
Stefan Stoyanov ◽  
Angele Jezerskaite
Keyword(s):  
Absorption Spectra ◽  
Photophysical Properties ◽  
Equilibrium Constants ◽  
Base Salt ◽  
Luminescence Characteristics

AbstractThe title compounds are used as sensitizers in electrophotography. The dependence of their absorption and luminescence characteristics on the substituent, medium and temperature is investigated. The influence of various factors on the equilibrium base - salt in solution is elucidated. On the basis of changes in the absorption spectra with concentration the equilibrium constants Kq are determined

Fullerene Polypyridine Ligands: Synthesis, Ruthenium Complexes, and Electrochemical and Photophysical Properties

2006 ◽  
Vol 12 (16) ◽  
pp. 4241-4248 ◽  
Author(s):  
Zhiguo Zhou ◽  
Ginka H. Sarova ◽  
Sheng Zhang ◽  
Zhongping Ou ◽  
Fatma T. Tat ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Ruthenium Complexes ◽  
Polypyridine Ligands

Synthesis and photophysical properties of zinc phthalocyanines substituted with quinolinoxy group

2009 ◽  
Vol 13 (12) ◽  
pp. 1206-1213 ◽  
Author(s):  
Jinping Xue ◽  
Lixuan Cai ◽  
Naisheng Chen ◽  
Jinling Huang
Keyword(s):  
Absorption Spectra ◽  
Electronic Absorption ◽  
Elemental Analysis ◽  
Fluorescence Spectra ◽  
Electronic Absorption Spectra ◽  
Photophysical Properties ◽  
Electronic Spectroscopy ◽  
Zinc Phthalocyanines ◽  
New Compounds ◽  
First Time

The synthesis of tetrasubstituted zinc phthalocyanines bearing quinolinoxy groups are reported for the first time. The new compounds have been characterized by elemental analysis, IR, MS and electronic spectroscopy. The photophysical properties, such as the electronic absorption spectra and fluorescence spectra, have also been investigated and discussed together with the influence of substituent position and organic solvents on these properties. The introduction of quinolinoxy group to the Pc ring was found to affect these photophysical properties to some extent.

scholarly journals Effect of Some Substituents Increasing the Solubility of Zn(II) and Al(III) Phthalocyanines on Their Photophysical Properties

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
A. A. Chernonosov ◽  
E. A. Ermilov ◽  
B. Röder ◽  
L. I. Solovyova ◽  
O. S. Fedorova
Keyword(s):  
Absorption Spectra ◽  
Structural Changes ◽  
Water Solubility ◽  
Transient Absorption ◽  
Photophysical Properties ◽  
Water Soluble ◽  
Quantum Yields ◽  
Carboxyl Groups ◽  
Transient Absorption Spectra ◽  
Photochemical Properties

Water solubility of phthalocyanines (Pcs) usually increases by the introduction of charged or carboxy substituents in the peripheral positions of the macrocycle. As a result, such structural changes influence their photophysical and photochemical properties as photosensitizers. Phthalocyanines substituted with four or eight terminal carboxyl groups and having in some cases additional eight positive charges (water soluble phthalocyanines) were studied in order to evaluate the spectroscopic and photophysical effects of these side residues on the chromophore properties. The quantum yield of singlet oxygen (O12) generation, the triplet-triplet absorption, and the transient absorption spectra were measured and linked to the structure of the substituents. It was shown that charged substituents did not change the quantum yields ofO12generation but decrease its lifetimes. The introduction of the charged substituents not only increases the water solubility but also significantly changes absorption, fluorescence, and transient absorption spectra of water soluble Pcs.

Mononuclear, dinuclear, and trinuclear ruthenium(II) complexes of a tris(bipyridine) bridging ligand: syntheses, absorption spectra, redox potentials, and photophysical properties

1990 ◽  
Vol 29 (3) ◽  
pp. 495-499 ◽  
Author(s):  
Luisa De Cola ◽  
Peter Belser ◽  
Frank Ebmeyer ◽  
Francesco Barigelletti ◽  
Fritz Voegtle ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Photophysical Properties ◽  
Redox Potentials ◽  
Bridging Ligand

scholarly journals Ethyne Functionalized Meso-Phenothiazinyl-Phenyl-Porphyrins: Synthesis and Optical Properties of Free Base Versus Protonated Species

Molecules ◽  
2020 ◽  
Vol 25 (19) ◽  
pp. 4546
Author(s):  
Eva Molnar ◽  
Emese Gál ◽  
Luiza Găină ◽  
Castelia Cristea ◽  
Luminița Silaghi-Dumitrescu
Keyword(s):  
Absorption Spectra ◽  
Density Functional ◽  
Photophysical Properties ◽  
Bathochromic Shift ◽  
Fluorescence Emission ◽  
Soret Band ◽  
Quantum Yields ◽  
Free Base ◽  
Wave Absorption ◽  
Long Wave

Synthesis, structural characterization and photophysical properties for a series of new trans-A2B2- and A3B-type ethynyl functionalized meso-phenothiazinyl-phenyl porphyrin derivatives are described. The new compounds displayed the characteristic porphyrin absorption spectra slightly modified by weak auxochromic effects of the substituents and fluorescence emission in the range of 651–659 nm with 11–25% quantum yields. The changes recorded in the UV-vis absorption spectra in the presence of trifluoroacetic acid (TFA) are consistent with the protonation of the two internal nitrogen atoms of the free-base porphyrin (19 nm bathochromic shift of the strong Soret band and one long wave absorption maxima situated in the range of 665–695 nm). Protonation of the phenothiazine substituents required increased amounts of TFA and produced a distinct hypsochromic shift of the long wave absorption maxima. The density functional theory (DFT) calculations of a porphyrin dication pointed out a saddle-distorted porphyrin ring as the ground-state geometry.

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