The　solvent　effect　on　the　photoinduced　charge　transfer　between　N,　N-dimethylaniline　and　quinone　has　been　investigated.　Geometries　of　the　isolated　donor　and　acceptor　have　been　optimized　using　B3LYP/6-31G**　method.　Two　relative　stable　conformers　P　and　T　of　the　complex　have　been　obtained　with　the　symmetry　of　C　s.　Excited　states　of　the　complex　have　been　calculated　at　the　level　of　CIS/6-31　+　G**　in　the　gas　phase.　The　results　indicate　that　the　complete　charge　separation　within　the　complex　occurs　in　the　third　excited　singlet　state　of　P,　but　only　partial　charge　transfer　for　the　same　excited　state　of　T.　At　the　same　basis　level,　excited　states　of　the　complex　in　the　solution　have　been　investigated.　Comparing　the　results　in　the　solution　with　the　gas-phase　ones,　the　charge　separation　of　the　third　excited　singlet　states　of　both　conformers　is　found　fairly　well.　The　absorption　spectrum　in　the　solution　has　a　large　red　shift.