Nanocomposites of poly[（2-methoxy,5-octoxy）1,4-phenylenevinylene]-zinc selenide （MOPPV-ZnSe） are synthesized by mixing the polymerization of 1,4-bis （chloromethyl）-2-methoxy-5-octoxy-benzene in the presence of Z...Nanocomposites of poly[（2-methoxy,5-octoxy）1,4-phenylenevinylene]-zinc selenide （MOPPV-ZnSe） are synthesized by mixing the polymerization of 1,4-bis （chloromethyl）-2-methoxy-5-octoxy-benzene in the presence of ZnSe quantum dots. The resulting MOPPV-ZnSe nanocomposites possess a well-defined interfacial contact, thus significantly promoting the dispersion of ZnSe within the MOPPV matrix and facilitating the electronic interaction between these two components. Raman and UV-visible absorption spectra are influenced by the incorporation of ZnSe nanocrystals. High-resolution transmission electron microscopic and tapping-mode atomic force microscopic results show clearly the evidence for phase-segregated networks of ZnSe nanocrystals, which provide a large area of interface for charge sep- aration to occur. Steady-state spectra of MOPPV-ZnSe nanocomposites are markedly quenched by the introduction of intimate polymer/ZnSe junctions. Time-resolved photoluminescence measurements show that the lifetime decays quickly, which further confirms the occurrence of charge transfer in MOPPV-ZnSe nanocomposites.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No. 50873074)Program for New Century Excellent Talents in University of Chinese Education Ministry (Grant No. 060232)+1 种基金Foundation for Key Program of Ministry of Education, China (Grant No. 108029)Scientific Research Foundation of Xi’an Jiaotong University, China (Grant No.011092)
文摘Nanocomposites of poly[（2-methoxy,5-octoxy）1,4-phenylenevinylene]-zinc selenide （MOPPV-ZnSe） are synthesized by mixing the polymerization of 1,4-bis （chloromethyl）-2-methoxy-5-octoxy-benzene in the presence of ZnSe quantum dots. The resulting MOPPV-ZnSe nanocomposites possess a well-defined interfacial contact, thus significantly promoting the dispersion of ZnSe within the MOPPV matrix and facilitating the electronic interaction between these two components. Raman and UV-visible absorption spectra are influenced by the incorporation of ZnSe nanocrystals. High-resolution transmission electron microscopic and tapping-mode atomic force microscopic results show clearly the evidence for phase-segregated networks of ZnSe nanocrystals, which provide a large area of interface for charge sep- aration to occur. Steady-state spectra of MOPPV-ZnSe nanocomposites are markedly quenched by the introduction of intimate polymer/ZnSe junctions. Time-resolved photoluminescence measurements show that the lifetime decays quickly, which further confirms the occurrence of charge transfer in MOPPV-ZnSe nanocomposites.
