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 Using internal electrostatic fields to manipulate the valence manifolds of copper complexes

2021 ◽  
Author(s):  
Alexander B. Weberg ◽  
Samuel P. McCollom ◽  
Laura M. Thierer ◽  
Michael R. Gau ◽  
Patrick J. Carroll ◽  
...  
Keyword(s):  
Coordination Sphere ◽  
Copper Complexes ◽  
Photophysical Properties ◽  
Redox Potentials ◽  
Electrostatic Effects ◽  
Electrostatic Fields ◽  
Secondary Coordination Sphere

Secondary coordination sphere electrostatic effects tune the valence manifolds of copper centers, impacting molecular geometries, photophysical properties, and redox potentials.

Effect of NO2 substitution and solvent on UV-visible spectra, redox potentials and electron transfer mechanisms of copper β-nitrotriarylcorroles. Proposed electrogeneration of a Cu(I) oxidation state

2016 ◽  
Vol 20 (07) ◽  
pp. 753-765 ◽  
Author(s):  
Lina Ye ◽  
Zhongping Ou ◽  
Yuanyuan Fang ◽  
Yang Song ◽  
Bihong Li ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Soret Band ◽  
Redox Potentials ◽  
Nonaqueous Media ◽  
Initial Assignment ◽  
Visible Spectra ◽  
Phenyl Rings ◽  
Uv Visible ◽  
Electron Reduction ◽  
Transfer Mechanisms

Three copper triarylcorroles containing a [Formula: see text]-pyrrole nitro substituent were synthesized and characterized as to their spectral and electrochemical properties in nonaqueous media. The examined compounds are represented as [Formula: see text]-NO2(YPh)3CorCu, where Cor is the trianion of a triphenylcorrole and Y is a Cl, H or CH3 substituent at the para-position of the three meso-phenyl rings of the compound. The data from absorption spectra, electrochemistry and thin-layer spectroelectrochemistry are consistent with an initial assignment of Cu[Formula: see text]-Cor[Formula: see text] in CH2Cl2, DMF and pyridine and electrogeneration of a formal Cu(II) corrole with an unreduced macrocycle, represented as Cu[Formula: see text]-Cor[Formula: see text], after the first one-electron reduction in these solvents. The doubly reduced [Formula: see text]-nitrocorrole has a sharp Soret band at 439 nm and a well-defined Q-band at 611 nm in CH2Cl2. Similar absorption spectra are seen for the three examined doubly reduced nitrocorroles in DMF and pyridine, suggesting formation of a Cu(I) species with an unreduced macrocycle which is represented as Cu[Formula: see text]-Cor[Formula: see text]. Changes in redox potentials and absorption spectra of the nitrocorroles are examined as a function of solvent and substituents on the meso-phenyl rings of the compounds and comparisons are made between spectral and electrochemical data of the newly synthesized corroles and that of structurally related tetraarylcorroles lacking a [Formula: see text]-nitro group.

scholarly journals Synthesis and photophysical properties of Ir(iii)/Re(i) dyads: control of Ir→Re photoinduced energy transfer

2016 ◽  
Vol 45 (28) ◽  
pp. 11568-11579 ◽  
Author(s):  
Suad T. Saad ◽  
Alexander J. Metherell ◽  
Elizabeth Baggaley ◽  
Michael D. Ward
Keyword(s):  
Energy Transfer ◽  
Photophysical Properties ◽  
Bridging Ligand

The extent of Ir→Re photoinduced energy transfer in Ir(iii)/Re(i) dyads can be controlled using a solvent-sensitive conformationally flexible bridging ligand.

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

Tuning the Electrochemical and Photophysical Properties of Osmium-Based Photoredox Catalysts

Synlett ◽  
2022 ◽  
Author(s):  
Eva Bednářová ◽  
Logan R. Beck ◽  
Tomislav Rovis ◽  
Samantha L. Goldschmid ◽  
Katherine Xie ◽  
...  
Keyword(s):  
Ground State ◽  
Emission Spectroscopy ◽  
Near Infrared ◽  
Photophysical Properties ◽  
Low Energy ◽  
Redox Potentials ◽  
Nir Light ◽  
Osmium Complexes ◽  
Absorption And Emission Spectroscopy

AbstractThe use of low-energy deep-red (DR) and near-infrared (NIR) light to excite chromophores enables catalysis to ensue across barriers such as materials and tissues. Herein, we report the detailed photophysical characterization of a library of OsII polypyridyl photosensitizers that absorb low-energy light. By tuning ligand scaffold and electron density, we access a range of synthetically useful excited state energies and redox potentials.1 Introduction1.1 Scope1.2 Measuring Ground-State Redox Potentials1.3 Measuring Photophysical Properties1.4 Synthesis of Osmium Complexes2 Properties of Osmium Complexes2.1 Redox Potentials of Os(L)2-Type Complexes2.2 Redox Potentials of Os(L)3-Type Complexes2.3 UV/Vis Absorption and Emission Spectroscopy3 Conclusions

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

Coordination and electrochemistry of new substituted manganese phthalocyanines

2012 ◽  
Vol 16 (07n08) ◽  
pp. 946-957 ◽  
Author(s):  
Olga Dolotova ◽  
Alexandr Konarev ◽  
Konstantin Volkov ◽  
Vladimir Negrimovsky ◽  
Oleg L. Kaliya
Keyword(s):  
Absorption Spectra ◽  
Electronic Absorption ◽  
Elemental Analysis ◽  
High Purity ◽  
Electronic Absorption Spectra ◽  
Redox Potentials ◽  
Organic Base

A number of substituted manganese phthalocyanines PcMn have been synthesized from the corresponding phthalonitriles with rather good yields (up to 67%) and high purity. All complexes were characterized by elemental analysis, electronic absorption spectra, and some of them by redox potentials. Three coordination forms — PcMn(II), PcMn(III)X and [LPcMn(III)]2O were fixed for all complexes. The equilibrium of three electronic isomers — Pc+· Mn(I) × L, PcMn(II) × Ln and Pc-· Mn(III) × 2L — has been observed in solutions of all PcMn(II) in the presence of organic base L.

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.

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