β-Pyrrole brominated meso-tetraphenylporphyrins: synthesis, spectral and electrochemical properties

2004 ◽  
Vol 08 (02) ◽  
pp. 201-214 ◽  
Author(s):  
Zhongping Ou ◽  
Jianguo Shao ◽  
Francis D'Souza ◽  
Pietro Tagliatesta ◽  
Karl M. Kadish
Keyword(s):  
Electrochemical Properties ◽  
Catalytic Properties ◽  
Redox Behavior ◽  
Porphyrin Ring ◽  
Visible Spectra ◽  
Uv Visible ◽  
Spectral And Electrochemical Properties

The synthesis, catalytic properties, UV-visible spectra and electrochemistry of β-pyrrole brominated porphyrins are summarized in this brief review. The effect of the Br substituents of the porphyrin ring on the redox behavior, and on axial CO or pyridine binding to the porphyrins is also discussed.

pH and temperature responsive redox behavior of biologically important aniline derivatives

RSC Advances ◽  
2015 ◽  
Vol 5 (79) ◽  
pp. 64617-64625 ◽  
Author(s):  
Hanif Subhan ◽  
Aref Lashin ◽  
Usman Ali Rana ◽  
Nassir Al-Arifi ◽  
Khurshid Ahmad ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Colour Change ◽  
Redox Behavior ◽  
Temperature Responsive ◽  
Aniline Derivatives ◽  
Visible Spectra ◽  
Uv Visible

The electrochemical oxidation of anilines resulted in azodye formation which was evidenced by the appearance of a new peak in the UV-visible spectra (A) and colour change of the solution (B).

The Micro-Patterning of Polymer in the Presence of Porphyrin via Electrospinning

2007 ◽  
Vol 121-123 ◽  
pp. 653-656 ◽  
Author(s):  
Y.W. Jin ◽  
W. Liu ◽  
Yi Yang Zhao ◽  
C. Wang
Keyword(s):  
Catalytic Properties ◽  
Electrospinning Process ◽  
Current Interest ◽  
Zinc Porphyrin ◽  
Operational Conditions ◽  
Novel Technique ◽  
Micro Patterning ◽  
Visible Spectra ◽  
Uv Visible ◽  
Scanning Electron

Functional self-assembled structure with well-defined shapes and dimensions are of great current interest. Porphyrins are attractive building manifold patterning for these structures because of their electronic, optical, and catalytic properties. In this paper, we report a novel technique for the assembly patterning of polymers. An Electrospinning process was used to create patterning with diameter ranging from 3 μm to 4 μm and length of up to several hundred micrometers in the presence of Zinc Porphyrin. Scanning electron microscopy (SEM), UV- visible spectra and EDX spectra were used to characterize the patterning. The results indicated that the patterning depended on the concentration of Porphyrin and the operational conditions.

Synthesis and properties of a trinuclear copper(II) complex of a ligand with phthalocyanine and Schiff-base coordination sites

2018 ◽  
Vol 22 (01n03) ◽  
pp. 95-101
Author(s):  
Makoto Handa ◽  
Kenichi Kanagawa ◽  
Natsumi Yano ◽  
Haruki Yairi ◽  
Airi Okuno ◽  
...  
Keyword(s):  
Schiff Base ◽  
Electrochemical Properties ◽  
Trinuclear Complex ◽  
Redox Behavior ◽  
Spectral Change ◽  
Phthalocyanine Complex ◽  
Coordination Site ◽  
Coordination Sites ◽  
Spectral And Electrochemical Properties

A trinuclear copper(II) phthalocyanine complex was synthesized by chelate coordination of the peripherally introduced Schiff-base nitrogen and phenoxide oxygen on the Cu(pc) core to a copper(II) ion. The magnetic, spectral and electrochemical properties were compared with those of the precursor mononuclear Cu(pc) complex with the NO chelate coordination site and a mononuclear Schiff-base copper(II) complex corresponding to the central bis-chelated unit of the title trinuclear complex. A stronger aggregating nature of the trinuclear complex compared with the precursor mononuclear Cu(pc) complex was confirmed by the spectral change of the Q band feature coming from the coordination to the copper(II) ion in dichloromethane. Two successive pc-ring reduction waves were not observed for the trinuclear complex in dichloromethane containing TBP(PF[Formula: see text], alternatively showing an irreversible wave in the reduction side. The central bis-chelated copper(II) ion was considered to play an important role for the redox behavior of the trinuclear complex.

Infrared and UV-visible spectra of layer semiconductors Gas, GaSe and GaTe

1977 ◽  
Vol 38 (10) ◽  
pp. 1293-1299 ◽  
Author(s):  
U. Giorgianni ◽  
G. Mondio ◽  
P. Perillo ◽  
G. Saitta ◽  
G. Vermiglio
Keyword(s):  
Visible Spectra ◽  
Uv Visible

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.

A theoretical study on the spectral and electrochemical properties of Ferrocene in different solvents

2013 ◽  
Vol 407 ◽  
pp. 82-90 ◽  
Author(s):  
Gianfranco Cattenacci ◽  
Massimiliano Aschi ◽  
Giuseppe Graziano ◽  
Andrea Amadei
Keyword(s):  
Electrochemical Properties ◽  
Theoretical Study ◽  
Spectral And Electrochemical Properties
Sign in / Sign up

Export Citation Format

Share Document