Tuning the maximum absorption wavelengths of phthalocyanine derivatives

2005 ◽  
Vol 09 (01) ◽  
pp. 32-39 ◽  
Author(s):  
Shan Jin ◽  
Gongzhen Cheng ◽  
George Z. Chen ◽  
Zhenping Ji
Keyword(s):  
General Formula ◽  
Absorption Spectra ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Substituent Effects ◽  
Maldi Tof Ms ◽  
Metal Free ◽  
Maldi Tof ◽  
Low Symmetry ◽  
Tof Ms

A new series of low-symmetry octasubstituted metal-free phthalocyanines with the general formula H 2 N x P β4− x ( OBu )8 ( x = 0-4) were synthesized by mixed condensation of two different substituted precursors (4,5-dibutoxy- phthalonitrile and 1,4-dibutoxy-2,3-dicyanonaphthalene). Their electronic absorption spectra and MALDI-TOF-MS were investigated. The regiospecific, nonlinear and linear substituent effects of alkoxyl groups on the positions of the Q-bands of phthalocyanines with different substituent groups at different peripheral positions were systematically investigated. The results could provide a guide to the tuning of Q-band absorptions of phthalocyanine derivatives.

scholarly journals The geometrical isomers of oxalato and malonato-(ethylenediamine-N,N’-di-S,S-2-propionato)-chromate(III) complexes

2005 ◽  
Vol 70 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Verica Glodjovic ◽  
Milan Joksovic ◽  
Srecko Trifunovic
Keyword(s):  
General Formula ◽  
Absorption Spectra ◽  
Malonic Acid ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Geometric Configuration ◽  
Sodium Oxalate ◽  
Geometrical Isomers

Three octahedral chromium(III) complexes of the general formula Na[Cr(S,S-eddp)L].2H2O, where eddp = the tetradentate O-N-N-O-type ligand ethylenediamine-N,N?-di-S,S-2-propionate and L = a bidentate O-O-type ligand, either oxalate or malonate, were prepared. The complexes were synthesized by the reaction of chromium(III) chloride, S,S-eddp and malonic acid or sodium oxalate, at 60?C. The complexes were isolated chromatographically and the geometric configuration of the complexes was proposed on the basis of their infrared and electronic absorption spectra.

Electronic absorption spectra of copper corroles: unexpected substituent effects in trans-meso-A2B-triarylcorrole complexes

2012 ◽  
Vol 16 (05n06) ◽  
pp. 695-704 ◽  
Author(s):  
Abraham Alemayehu ◽  
Marrigje M. Conradie ◽  
Abhik Ghosh
Keyword(s):  
Charge Transfer ◽  
Absorption Spectra ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Substituent Effects ◽  
Phenyl Group ◽  
Tddft Calculations ◽  
Reduction Potentials ◽  
In Trans ◽  
Soret Region

The Soret maxima of copper triarylcorroles are exquisitely sensitive to substitutions on the meso phenyl groups. Similar substituent effects are also known, in more muted form, for Mn and Fe corroles. In contrast, the Soret maxima Ag , CrO and MoO triarylcorroles are essentially invariant with respect to phenyl-group substituents. TDDFT calculations suggest that the unique substituent sensitivity in the copper case results from phenyl-to- Cu (dx2-y2) charge transfer character in the main peaks of the Soret region. To probe the phenonmenon in even greater depth, we have examined here the electrochemistry and electronic absorption spectra of a series of copper trans-A2B-triarylcorrole complexes, where the para substituents on the aryl groups include CF3 , H , CH3 , and OCH3 . Although both 5,15- and 10-substituents appear to influence the oxidation and reduction potentials of the copper corroles in a simple, additive manner, they affect the Soret maxima very differently. Thus, for a given 10-substituent, 5,15-aryl substituents exert a strong, "normal" substituent effect on the Soret maximum. For given 5,15-substituents, however, the 10-substituent has almost no effect on the Soret maximum. An attempt has been made to relate these somewhat curious observations to a molecular orbital picture based on copper triphenylcorrole.

SYNTHESIS OF NOVEL NANOMETER SIZE RUTHENIUM COMPLEXES FOR SINGLE ELECTRON CHARGING DEVICES AND THEIR ELECTROCHEMICAL PROPERTIES

2002 ◽  
Vol 01 (05n06) ◽  
pp. 631-635 ◽  
Author(s):  
HIROAKI ENDO ◽  
TAKUJI OGAWA
Keyword(s):  
Electrochemical Properties ◽  
Absorption Spectra ◽  
Ruthenium Complexes ◽  
Electrochemical Methods ◽  
Maldi Tof Ms ◽  
Nanometer Size ◽  
Redox States ◽  
H Nmr ◽  
Maldi Tof ◽  
Tof Ms

With the aim of studying single charging phenomena of individual molecules that have clear redox states, a series of ruthenium complexes surrounded by dendrimers were prepared. The structure and electronic characteristics of them were studied by 1 H NMR, MALDI TOF-MS, UV-vis absorption spectra and electrochemical methods. The electrochemical results revealed that the clear redox states were retained even with the surrounding dendrimers, and the molecules can be good candidates for nanometer size charging pools.

895: Proteomic Analysis of Sera from Bladder Cancer Patients with MALDI-TOF-MS

2007 ◽  
Vol 177 (4S) ◽  
pp. 297-297
Author(s):  
Kristina Schwamborn ◽  
Rene Krieg ◽  
Ruth Knüchel-Clarke ◽  
Joachim Grosse ◽  
Gerhard Jakse
Keyword(s):  
Bladder Cancer ◽  
Cancer Patients ◽  
Proteomic Analysis ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Tof Ms
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