Nine　new　copper(I)　complexes　bearing　1,3-bis(diphenylphosphino)propane　(dppp)　and　4,7-diphenyl-1,10-phenanthroline　(batho)　or　2,9-dimethyl-1,10-phenanthroline　(neo)　have　been　synthesized　and　characterized.　Single　crystal　X-ray　diffraction　analysis　reveals　that　complexes　1-4　and　6-9　are　mononuclear　with　similar　structures,　while　complex　5　is　a　binuclear　structure.　They　display　absorption　around　280　nm　and　410　nm,　and　the　intensive　emission　in　the　range　of　520-620　nm　in　the　solid　state　occurring　with　lifetimes　on　the　mu　s　timescale　indicates　phosphorescence.　Our　TD-DFT　calculations　show　that　emission　from　the　lowest　excited　triplet　state　T-1　is　of　(MLCT)-M-3　nature.　This　study　manifests　that　these　simple　and　long　lifetime　Cu(I)　systems　may　exhibit　a　similar,　but　more　complex　excited　state　behavior　than　the　systems　previously　appreciated.　(C)　2018　Elsevier　Ltd.　All　rights　reserved.