Nine　novel　copper(I)　complexes　with　diphosphine　and　diimine　ligands,　namely　[Cu(dpq)(xantphos)]BF4　(1),　[Cu(dpq)(xantphos)]I　(2),　[Cu(dpq)(dppp)]BF4　(3),　[Cu(dppz)(dppp)]BF4　(4),　[Cu(dppz)(dppp)]I　(5),　[Cu(dppz)(pop)]I　(6),　[Cu(dpq)(pop)]I　(7),　[Cu(dpq)(pop)]　Br　(8),　[Cu(dpq)(pop)]SCN　(9)　(dpq　=　pyrazino　[2,3-f][1,10]phenanthroline,　dppz　=　dipyrido[3,2-a:2＇,3＇-c]phenazine,　xantphos　=　9,9-dimethyl-4,5-bis　diphenylphosphanyl)xanthene,　dppp　=　1,3-bis(diphenylphosphino)propane,　pop　=　1,1＇-[(Oxydi-2,1-phenylene)]bis[1,1-diphenylphosphine]),　were　characterized　by　single　crystal　X-ray　diffraction,　IR,　elemental　analysis,　H-1　NMR,　P-31　NMR,　fluorescence　spectra　and　terahertz　time　domain　spectroscopy　(THz-TDS).　These　nine　complexes　were　synthesized　by　the　reactions　of　copper　salts,　diimine　ligands　and　various　of　P-donor　ligands　through　one-pot　method.　Single　crystal　X-ray　diffraction　reveals　that　complex　9　is　of　a　simple　mono-nuclear　structure　while　complexes　6　and　7　are　of　dimer　structures.　For　complex　8,　hydrogen　bonds　and　C-H　center　dot　center　dot　center　dot　pi　it　interactions　lead　to　the　formation　of　a　ID　infinite　chain　structure.　Interestingly,　complexes　1-5　show　novel　2D　or　3D　network　structures　through　C-H　center　dot　center　dot　center　dot　pi　interactions.　In　addition,　complexes　1-3　and　6-9　exhibit　interesting　fluorescence　in　the　solid　state　at　room　temperature.　Among　the　nine　complexes,　complex　1　shows　the　highest　quantum　yield　up　to　37%　and　the　lifetime　of　1　is　6.0　mu　s.　The　terahertz　(THz)　time-domain　spectra　of　these　complexes　were　also　studied.　(C)　2019　Elsevier　Ltd.　All　rights　reserved.