Syntheses, structures, electrochemical and optical properties of four transition metal complexes based on the 1-triazolyl-3-benzimidazolyltriazene ligand. Issue 6 (11th January 2016)

• Record Type: Journal Article
• Authors: Qiu, Yanxuan; Miao, Yu; Wang, Zizhou; Li, Zhixin; OuYang, Zhijian; Yang, Liu; Lin, Wenning; Feng, Weijin; Dong, Wen
• Is Part Of: RSC advances. Volume 6:Issue 6(2016)
• Page Start: 4969
• Page End: 4978
• Publication Date: 2016-01-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra21057g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The crystal structures, electrochemical and optical properties of four transition metal complexes based on 1-triazolyl-3-benzimidazolyltriazene (H3 TBIT) ligand have been reported. Abstract : Four transition metal complexes based on the 1-triazolyl-3-benzimidazolyltriazene (H3 TBIT) ligand of [Co(H2 TBIT)(HTBIT)] (1 ), {[Cu(H2 TBIT)(SCN)]·H2 O} (2 ), [Cd2 (H3 TBIT)2 (H2 O)2 Cl4 ] (3 ) and {[Ni3 (H2 TBIT)2 (HTBIT)2 (en)2 ]·IPA·2H2 O} (en = ethylenediamine, IPA = isopropanol) (4 ) have been synthesized and characterized by single crystal X-ray diffraction analysis. In1–4, the triazene ligand acts in different coordinating or bridging modes resulting in two mononuclear structures for1 and2, one dinuclear structure for3 and one trinuclear structure for4 . Different structural1–4 are further self-assembled through hydrogen bonds or π–π, C–H⋯π or metal–π interactions to form 3D supramolecular structures. The electrochemical properties in aqueous solutions as well as the photoluminescent properties in ethanol of H3 TBIT and1–4 are investigated. The TD-DFT calculations at the B3LYP/6-311++G(d, p) level for H3 TBIT has been used to demonstrate the characteristic absorption spectrum.