Synthesis, structures and fluorescent properties of metal complexes based on polyphosphine ligands

• Published in: Journal of molecular structure Vol. 1127; pp. 138 - 144
• Main Authors: Huang, Ting-Hong, Yang, Hu, Zhu, Sheng-Lan, Zhao, Bin, Yang, Yan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.01.2017
• Subjects: Crystal structure; Cu+/Ag+ complexes; Fluorescent properties; Polyphosphine ligands; Polyphosphine ligands; Cu+/Ag+ complexes; Fluorescent properties; Crystal structure
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2016.07.076

Based on polyphosphine ligands, four complexes, [Cu2(pba)2(pipzdtc)]·2DMF (1), [Cu2(pbaa) (Et-dtc)2]·2DMF (2), [Cu2(pnaa) (Et-dtc)2] (3) and [Ag2(pnaa) (Et-dtc)2] ·2CH3CN (4) (pba = N,N-bis((diphenylphosphino)methyl)benzenamine, pbaa = N,N,N′,N'-tetrakis((di-phenylphosphino)methyl)benzene-1,4-diamine, pnaa = N,N,N′,N'-tetrakis((diphenylphosphino)- methyl)naphthalene-1,5-diamine, Et-dtc = N-ethyldithiocarbamate and pipzdtc = piperazine- 1,4-dicarbodithiolate), have been synthesized and characterized by IR, ESI-MS and X-ray crystal structure analysis. The structural analysis shows that each Cu+/Ag+ in complexes 1–4 is four coordinate P2S2, and adopts a distorted-tetrahedral geometry, and 1D infinite chain of complexes 2 and 4 is built by CH⋯π interaction of phenyl rings from pbaa and pnaa. All these indicate that the change of polyphosphine ligands and metal ions might be the key of construction of 1D infinite chain. Moreover, the emission spectra of complexes 2–4 in DMF solvent are also observed. [Display omitted] •Four Cu+/Ag+ complexes have synthesized and characterized.•Some of complexes are organized into 1D chain by CH⋯π interactions.•The change of central spacers of phosphine ligands aims to improve the luminescence of these complexes.