From ring, chain to network: Synthesis, characterization, luminescent properties of silver(I) complexes constructed by diphosphine ligands and various N-donor ligands. (7th July 2016)

• Record Type: Journal Article
• Authors: Cui, Yang-Zhe; Yuan, Yuan; Li, Zhong-Feng; Liu, Min; Jin, Qiong-Hua; Jiang, Nan; Cui, Li-Na; Gao, Sen
• Is Part Of: Polyhedron. Volume 112(2016)
• Page Start: 118
• Page End: 129
• Publication Date: 2016-07-07
• Subjects: Silver(I) complexes -- Crystal structures -- Diphosphine -- N-donor ligands -- Luminescence; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2016.03.060
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: Complexes1 –7, containing diphosphine ligands, were synthesized and characterized by X-ray diffraction, IR, 1 H NMR and fluorescence spectra. Strikingly, complex5 displays a 2D architecture through hydrogen bonds to form a "honeycomb" (6, 3) network structure. Complex7 is prepared by the ring-opening reaction of complex6 . Abstract: Six novel silver(I) complexes with diphosphine ligands, namely [Ag2 (μ-dppm)2 (phen)2 ](NO3 )2 (1 ), {[Ag2 (dppm)2 (μ-bpp)](ClO4 )2 } n (2 ), [Ag4 (dppm)4 (μ-dpe)(CH3 CN)2 ](BF4 )4 ·(H2 O)·(CH3 CN) (3 ), {[Ag(μ-dppe)(dicnq)](BF4 )·(DMF)} n (4 ), {[Ag(μ-dppe)(dmapym)](BF4 )} n (5 ) and {[Ag(μ-dppb)(phen)](BF4 )·(CH3 CN)} n (7 ) (dppm = bis(diphenylphosphino)methane, dppe = 1, 2-bis(diphenylphosphino)ethane, dppb = 1, 4-bis(diphenylphosphino)butane, phen = 1, 10-phenanthroline, bpp = 1, 3-bis(4-pyridyl)propane, dpe = 1, 2-di(4-pyridyl)ethene, dicnq = 6, 7-dicyanodipyridoquinoxaline, dmapym = 2-amino-4, 6-dimethylpyrimidine), were characterized by X-ray diffraction, IR, 1 H NMR and fluorescence spectra. These complexes have been synthesized by the reactions of silver salts, diphosphine ligands and various N-donor ligands in different solvents. The complex [Ag2 (μ-dppb)2 ](BF4 )2 (6 ) has been reported in a previous study and complex7 was prepared by a ring-opening reaction using complex6 as a precursor. 1 H NMR spectroscopy and fluorescence spectra of complex6 were also measured. Complexes1 and6 are dinuclear complexes with an [Ag2 (μ-PP)2 ] 2+ ring bridged by diphosphine ligands. In complexes2, 4, 5 and7, the Ag ions are bridged by ligands (bpp, dppe and dppb, respectively) to form 1D infinite chain structures. In particular, the [Ag2 (dppm)2 ] 2+ units of complex2 are linked by the bpp ligand rather than the diphosphine ligands. Strikingly, complex5 displays a 2D "honeycomb" (6, 3) network structure formed through hydrogen bonds. Complex3 consists of a tetranuclear structure where the two [Ag2 (μ-dppm)2 (CH3 CN)] 2+ moieties are linked by a dpe ligand in bidentate-bridging fashion. All the emission peaks of these complexes are attributed to ligand-centered [π–π ∗ ] transitions.