Two polythiophene based polymers,poly[(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene)-co-thiophene](PT1)and poly(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene)(PT2),are synthesized and investigated by stat...Two polythiophene based polymers,poly[(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene)-co-thiophene](PT1)and poly(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene)(PT2),are synthesized and investigated by static,picosecond fluorescence spectroscopies and the femtosecond up-conversion technique in solution.Compared with pristine poly(3-hexylthiophene)(P3HT),PT1 and PT2,in which the main chains are decorated with phenyl vinylene present a‘camel back’structure in the absorption spectra.Phenyl vinylene side chains induce a new process of charge transfer,chain twisting motion and defect-induced fluorescence quenching at time scales of 1 ps,10 ps and 150 ps,respectively.展开更多
基金by the National Natural Science Foundation of China under Grant Nos 10504001,60878019,10821062,10934001,60677002,10828407the National Basic Research Program of China under Grant Nos 2009CB930504,2007CB307001,2006CB921601,2006CB806007.
文摘Two polythiophene based polymers,poly[(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene)-co-thiophene](PT1)and poly(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene)(PT2),are synthesized and investigated by static,picosecond fluorescence spectroscopies and the femtosecond up-conversion technique in solution.Compared with pristine poly(3-hexylthiophene)(P3HT),PT1 and PT2,in which the main chains are decorated with phenyl vinylene present a‘camel back’structure in the absorption spectra.Phenyl vinylene side chains induce a new process of charge transfer,chain twisting motion and defect-induced fluorescence quenching at time scales of 1 ps,10 ps and 150 ps,respectively.
