Synthesis, structure, luminescent properties, and photocatalytic behavior of 0D-3D silver(I) complexes bearing both diphosphine ligands and 1,10-phenanthroline derivatives

Six new silver(I) complexes with diphosphine ligands and 1,10-phenanthroline derivatives are named by [Ag-2(dppe)(dicnq)(2)](CF3SO3)(2) (1), Ag-2(dppp)(2)(dicnq)(2)](CF3SO3)(2) (2), Ag-2(dppp)(2)(dicnq)(2)](CF3SO3)(2) (3), [Ag(DPEphos)(dicnq)]CF3SO3 (4), {[Ag(dppe)(dmp)](CF3SO3)center dot(CH3OH)center dot(H2O)(n)) (5), [Ag-2(dppp)(2)(dmp)(2)] (CF3SO3)(2)center dot(H2O) (6), (dppe = 1,2-bis(diphenylphosphino)ethane, dppp = 1,3-bis(diphenylphosphino)propane, dppb = 1,4-bis(diphenylphosphino)butane, DPEphos = bis[2-(diphenylphosphanyl)phenyllether, dmp = 2,9-dimethyl-1,10-phenanthroline, dicnq = 6,7-dicyanodipyridoquinoxaline) were characterized by IR and X-ray diffraction. Further fluorescence spectroscopy, photocatalytic properties and terahertz time-domain spectra (THz-TDS) were performed on 2-6. Complexes 1-3 and 6 were binuclear, while 4 was mononuclear. Complex 5 was a coordination polymer, displaying a one-dimensional infinite chain. Moreover, complexes 1, 2 and 4 were assembled via several pairs of C-H...pi It interactions to 1D-3D supramolecular architectures. The emission peaks of the complexes 2-4 all exhibit a large degree of red shift, which may be tentatively attributed to the intraligand transition. Compounds 2-6 represented the first examples of Ag(I) complexes bearing both diphosphine and diimine ligands that exhibit high, efficient photocatalytic abilities for dye degradation under UV light and show good stability toward photocatalysis. (C) 2018 Elsevier Ltd. All rights reserved.