El-Khouly Mohamed E
Department of Chemistry, Faculty of Education, Kafr El-Sheikh, Tanta University, Egypt.
Photochem Photobiol Sci. 2007 May;6(5):539-44. doi: 10.1039/b617814f. Epub 2007 Feb 15.
Photoinduced bimolecular electron transfer processes of fullerenes (C60/C70) with fluorene derivatives, namely 9,9-bis(4-amino-3-methylphenyl)fluorene (BAMF), 9,9-bis(4-amino-3-fluorophenyl)fluorene (BAFF) and 9,9-bis(3-amino-4-hydroxyphenyl)fluorene (BAHF) have been comparatively studied in benzonitrile by nanosecond laser photolysis technique in the visible/near-IR regions. By the selective excitation of C60/C70 using 532 nm laser light, it has been proved that electron transfer takes place from the ground state fluorenes to the triplet excited state of C60/C70. The observed rates and efficiencies of the electron transfer processes are found to be significantly associated with the substitution patterns on the 9,9-bisphenylfluorenes, and to be correlative with the free energy changes on the basis of the Rehm-Weller relation.
采用纳秒激光光解技术，在可见光/近红外区域对富勒烯（C60/C70）与芴衍生物，即9,9-双（4-氨基-3-甲基苯基）芴（BAMF）、9,9-双（4-氨基-3-氟苯基）芴（BAFF）和9,9-双（3-氨基-4-羟基苯基）芴（BAHF）之间的光致双分子电子转移过程进行了比较研究。通过使用532 nm激光对C60/C70进行选择性激发，已证明电子从基态芴转移至C60/C70的三重激发态。发现电子转移过程的观测速率和效率与9,9-双苯基芴上的取代模式显著相关，并根据雷姆-韦勒关系与自由能变化相关。
