Cadmium(II)-imidazolylazo dyes: Synthesis, structure and photochromism

Autor:	B.G. Chand, Pallepogu Raghavaiah, Chittaranjan Sinha, Shefali Saha, Tian-Huey Lu, J.-S. Wu
Rok vydání:	2012
Předmět:	Cadmium Stereochemistry Ligand chemistry.chemical_element Activation energy Medicinal chemistry Inorganic Chemistry Photochromism chemistry.chemical_compound chemistry Materials Chemistry Proton NMR Imidazole Physical and Theoretical Chemistry Single crystal Isomerization
Zdroj:	Polyhedron. 46:81-89
ISSN:	0277-5387
DOI:	10.1016/j.poly.2012.07.061
Popis:	1-Alkyl-2-{(o-thioalkyl)phenylazo}imidazole acts as imidazolyl-N donor ligand to Cd(II) although they have potential three donor centres namely N(imidazole), N(azo) and –SR. Two series of complexes [Cd(SRaaiNR/)2X2] (X = Cl, Br, I) and [Cd(SRaaiNR/)4](ClO4)2 are synthesized with these ligands. These complexes are spectroscopically (IR, UV–Vis, 1H NMR) characterised and, the single crystal X-ray structures of [Cd(SEtaaiNEt)2I2] and [Cd(SEtaaiNEt)4](ClO4)2 (where SEtaaiNEt = 1-ethyl-2-{(o-thioalkyl)phenylazo}imidazole) have confirmed the distorted tetrahedral structures. The UV light irradiation in MeCN solution of the complexes shows E-to-Z (E and Z refer to trans and cis-configuration about –N N–, respectively) isomerisation of the coordinated azoimidazole. The rate of isomerisation follows the sequence : [Cd(SRaaiNR/)4](ClO4)2
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::453a80970249c3c8d55607a36e883e47 https://doi.org/10.1016/j.poly.2012.07.061 Zobrazit plný text záznamu Full Text from ScienceDirect