Five　mono-nuclear　silver　(I)　complexes　with　6,7-dicyanodipyridoquinoxaline　ligand,　namely　{[Ag(DPEphos)(dicnq)]NO3}(2)center　dot　CH3OH　(1),　[Ag(DPEphos)(dicnq)]　BF4　center　dot　CH3OH　(2),　[Ag(XANTphos)　(dicnq)]　CF3SO3　(3),　{[Ag(XANTphos)(dicnq)]　NO3}(2)　(4),　and　[Ag(XANTphos)(dicnq)]　ClO4　center　dot　CH2Cl2　(5)　{DPEphos　=　bis[2-(diphenylphosphanyl)　phenyl]　ether,　dicnq　=　6,7-dicyanodipyridoquinoxaline,　XANTphos　=　9,9-dimethyl-4,5-bis(diphenylphosphanyl)　xanthene}　were　characterized　by　X-ray　diffraction,　IR,　H-1　NMR,　P-31　NMR,　fluorescence　spectra,　and　terahertz　time-domain　spectra　(THz-TDS).　In　the　five　complexes　the　Ag-I,　which　is　coordinated　by　two　kinds　of　chelating　ligands,　adopts　four-coordinate　modes　to　generate　mono-nuclear　structures.　The　C-H　center　dot　center　dot　center　dot　pi　interactions　lead　to　formation　of　a　1D　infinite　chain　for　complexes　2　and　3.　The　crystal　packing　of　complexes　1　and　5　reveal　that　they　form　3D　supermolecular　network　by　several　pairs　of　C-H　center　dot　center　dot　center　dot　pi　interactions.　The　emissions　of　these　complexes　are　attributed　to　ligands-centered　[pi-pi*]　transition　based　on　both　of　the　P-donor　and　N-donor　ligands.