Synthesis and characterization of a cadmium-dichloro compound of N , N , O -di-2-pyridyl ketone thiophene-2-carboxylic acid hydrazone (η 3-dpktch). The structure of [CdCl2(η 3-dpktch)]

Autor: Mark A.W. Lawrence, Marvadeen A. Singh-Wilmot, Mohammed Bakir
Rok vydání: 2007
Předmět:
Zdroj: Journal of Coordination Chemistry. 60:2385-2399
ISSN: 1029-0389
0095-8972
DOI: 10.1080/00958970701266732
Popis: The reaction between dpktch and CdCl2 in refluxing acetonitrile gave [CdCl2(η3-dpktch)] in good yield. Spectroscopic measurements divulge the coordination of dpktch and the elemental analysis confirmed its formulation. Optical measurements in N,N-dimethylformamide (dmf) and dimethylsulfoxide (DMSO) in the absence and presence of a proton donor/acceptor disclosed two highly sensitivity interlocked intra-ligand-charge-transfer transitions (ILCT) that are sensitive to their surroundings. Under basic conditions, a low-energy electronic transition with an extinction coefficient of 17,400 ± 2000 M−1cm−1 appeared at ∼403 nm and a peak minimum appeared at 326 nm. Under acidic conditions, a high energy electronic transition with extinction coefficient of 13,500 ± 2000 M−1cm−1 appeared at ∼330 nm and a shoulder appeared at ∼400 nm. The addition of an acid to a dmf solution of [CdCl2(η3-dpktch)] caused the disappearance of the low energy absorption band at 403 nm and a peak maximum appeared at 330 nm. The reverse wa...
Databáze: OpenAIRE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje