Polynuclear Cu(i) and Ag(i) phosphine complexes containing multi-dentate polytopic ligands: syntheses, crystal structures and photoluminescence properties. Issue 2 (18th December 2018)

• Record Type: Journal Article
• Authors: Xiang, Jing; Cheng, Shun-Cheung; Jin, Xin-Xin; Su, Qian-Qian; Zhou, Xin; Chu, Wing-Kin; Leung, Chi-Fai; Ko, Chi-Chiu
• Is Part Of: Dalton transactions. Volume 48:Issue 2(2018)
• Page Start: 741
• Page End: 750
• Publication Date: 2018-12-18
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c8dt03377c
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A series of polynuclear Cu(i )/Ag(i ) complexes have been obtained on the basis of three polytopic ligands. Their structures and photophysical properties have been investigated in detail. Abstract : A series of polynuclear metal complexes, [Cu2 (L 1 )(PPh3 )4 ](ClO4 )2 (1 ), [Cu3 (L 2 )(PPh3 )6 ](ClO4 ) (2 ), [Cu3 (L 3 )(PPh3 )6 ] (3 ), [Ag2 (L 1 )(PPh3 )4 ](BF4 )2 (4 ), [Ag4 (L 2 )2 (PPh3 )6 ] (5 ) and [Ag3 (L 3 )(PPh3 )5 ] (6 ), have been obtained from the reactions of the highly conjugated bridging ligands 2, 3-bis(2-pyridyl)pyrazine (L 1 ), 2, 3-bis(2-tetrazoyl)pyrazine (H2 L 2 ) and 2, 3-bis(2-tetrazoyl)imidazole (H3 L 3 ) with [Cu(MeCN)4 ]ClO4 and AgBF4, respectively. Their crystal structures have been determined by X-ray crystallography and their photophysical properties have been investigated in detail. Complexes1 and3 show photoluminescence in CH2 Cl2 solution, while all the complexes exhibit obvious luminescence in the solid state; detailed photophysical studies and density functional theory calculations of these complexes have revealed that their lowest energy absorptions and emissions are predominantly derived from either metal-to-ligand charge-transfer (MLCT) or intraligand (IL) excited states.