Enhancement of Two-photon Absorption by Ce^(3+) Sensitization in Organic Dyes  

作　　者：LI Jian-fu SUN Cheng-lin ZHOU Hai-ling XU Li-hua YANG Qing-xin JIANG Zhan-kui 

机构地区：[1]Department of Physics, Linyi Normal University, Linyi 276005, P. R. China [2]College of Physics, Jilin University, Changchun 130021, P. R. China [3]Department of Physics, Yantai University, Yantai 246005, P. R. China

出　　处：《Chemical Research in Chinese Universities》2007年第5期571-573,共3页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.10074020).

摘　　要：The two-photon absorption（TPA）and TPA-induced frequency upconversion emission properties of the dyes 4-[P-（dicyanoethylamino）crystal]-N-methypyrdinium iodide and the complex of 4-[P-（dicyanoethylamino）crystal]-N-methypyrdinium iodide and Ce（NO3）3 were experimentally studied.It was found that the TPA cross section for the dye sensitized by Ce3＋ is two factors larger than that of the dye without being sensitized.A three-level system model of the dye molecules was used to analyze the enhancement of TPA by the sensitizer Ce3＋,which indicated that the sensitizer results in the increase of the transition dipole moment from the one-photon allowed excited state（1Bu）to the two-photon allowed excited state（2Ag）.The two-photon absorption（TPA）and TPA-induced frequency upconversion emission properties of the dyes 4-[P-（dicyanoethylamino）crystal]-N-methypyrdinium iodide and the complex of 4-[P-（dicyanoethylamino）crystal]-N-methypyrdinium iodide and Ce（NO3）3 were experimentally studied.It was found that the TPA cross section for the dye sensitized by Ce3＋ is two factors larger than that of the dye without being sensitized.A three-level system model of the dye molecules was used to analyze the enhancement of TPA by the sensitizer Ce3＋,which indicated that the sensitizer results in the increase of the transition dipole moment from the one-photon allowed excited state（1Bu）to the two-photon allowed excited state（2Ag）.

关 键 词：Two-photon absorption Frequency upconversion Organic dye 

分 类 号：TQ613[化学工程—精细化工]