Synthesis, characterization, luminescent properties of silver (I) complexes based on organic P-donor ligands and mercaptan ligands

Eight silver (I) complexes with P-donor ligands [triphenylphosphine (PPh3), bis(diphenylphosphino) methane (dppm), 1,2-bis(diphenylphosphino)ethane (dppe) and 1,4-bis(diphenylphosphino)butane (dppb)] and mercaptan ligands [3-amino-5-mercapto-1,2,4-triazole (H(2)AMTA), 2-amino-5-mercapto-1,3,4-thiadiazole (HAMTD), 2-mercapto-6-nitrobenzothiazole (HMNBT) and 2-mercapto-5-methyl-benzimidazole (HMMBD)] named by [Ag-2(PPh3)(4)(HAMTA)(2)](n) (1), [Ag-3(dppm)(3)(AMTD)(2)](2)(BF4)(2)center dot(dppm) (2), [Ag-3(dppm)(3)(AMTD)(2)](2)(ClO4)(2)center dot(dppm) (3), [Ag-4(dppm)(4)(MNBT)(2)](SO4)center dot(H2O) (4), [Ag-4(dppe)(4) (HAMTA)(2)(AMTA)] (5), [Ag-2(dppb)(2)(HAMTD)(2)](CF3SO3)(2)center dot 2(CH3OH) (6), [Ag-2(dppb)(2)(HMNBT)(2)](CF3SO3)(2) (7) and {[Ag(dppb)(HMMBD)(2)](CF3SO3)center dot 2(CH3OH)center dot(H2O)}(n) (8) are characterized by X-ray diffraction, NMR and fluorescence spectroscopy. Complexes 1 and 8 show 2D network structure. Complexes 2-5 are multi-nuclear clusters. Complexes 6-7 are of di-nuclear structure. In complex 7, the offset pi...pi interactions between the neighboring benzene rings help to form the 1-D infinite chain. All the emission peaks of these complexes are attributed to ligands-centered [pi-pi*] transitions. (C) 2017 Elsevier Ltd. All rights reserved.