四个固定距离的卟啉醌分子1-syn,1-anti,2-syn和2-anti,被合成。这些分子具有通过刚性戊烯间隔基连接到萘醌的5-苯基-10,15,20-三戊基卟啉锌电子供体。间隔基的中心苯环在1中未被取代,并在2中具有对二甲氧基取代基。萘醌在整个间隔基上与卟啉呈同位或反位。这些分子提供了有关卟啉和醌之间电子转移的取向依赖性以及这种转移对间隔基的低位离子态的依赖性的信息。萘醌氧化卟啉最低激发态的速率常数为1-syn:8.2 x 10 9 s -1 ; 1-anti:1.7 x 10 10s -1 ; 2同步:8.5 x 10 9 s -1 ; 2-anti:1.9×10 10 S -1。卟啉阳离子-萘醌阴离子重组反应的速率常数为1-syn:1.4 x 10 10 s -1 ; 1-anti:2.5 x 10 10 s -1 ; 2同步:5.0 x 10 10 s -1 ; 2反:8.2 x
Photoinduced electron transfer in meso-triphenyltriptycenylporphyrin-quinones. Restricting donor-acceptor distances and orientations
作者:Michael R. Wasielewski、Mark P. Niemczyk
DOI:10.1021/ja00329a089
日期:1984.8
Etude des reactions de transfert d'electron photochimiques dans les porphyrines a liaisons covalentes avec les quinones (benzo, naphto, anthraquinones). Le transfert d'electron exothermique rapide peut se produire a des distances de >10 A. Rendements quantiques de fluorescence
转移 d'electron photochimiques dans les porphyrines a liaisons covalentes avec les quinones (benzo, naphto, anthraquinones) 的反应练习曲。Le transfert d'electron exothermique Rapide peut se produire a des distances de >10 A. Rendements quantiques de荧光
Benzo- and Naphtho-derivatives of Triptycene: Synthesis and Properties
Several benzo- and/or naphtho-derivatives of triptycene were prepared in a manner of addition reaction of dehydronaphthalene (XIII) or a new type of aryne, dehydroanthraquinone (XVI) generated from 3-aminoanthraquinone-2-carboxylic acid (XV), with a few acenes. The absorption bands in longer wavelength region of their UV spectra and the chemical shift of bridgehead protons in their NMR spectra led
Anthracene Capped Isobenzofuran: A Synthon for the Preparations of Iptycenes and Iptycene Quinones
作者:Bao-Jian Pei、Wing-Hong Chan、Albert W. M. Lee
DOI:10.1021/ol200309v
日期:2011.4.1
Anthracene capped isobenzofuran 5 (5,6-(9,10-dihydroanthracen-9,10-yl)isobenzofuran) was synthesized for the first time. It is a highly reactive and versatile synthon for the synthesis of iptycene derivatives via Diels−Alder reactions. Cycloadducts 10 could be readily deoxygenated to iptycenes 11. Two new reactions of PhI(OAc)2/TfOH have been explored. Endoxides 10 were directly oxidized to iptycene
Ultrafast photoinduced electron transfer in rigid donor-spacer-acceptor molecules: modification of spacer energetics as a probe for superexchange
作者:Michael R. Wasielewski、Mark P. Niemczyk、Douglas G. Johnson、Walter A. Svec、David W. Minsek
DOI:10.1016/s0040-4020(01)85152-8
日期:1989.1
20-tripentylporphyrin electron donor attached to a naphthoquinone via a rigid pentiptycene spacer. The central benzene ring of the spacer is unsubstituted in 1 and possesses p-dimethoxy substituents in 2. The naphthoquinone is oriented either syn or anti to the porphyrin across the spacer. These molecules provide information concerning the orientation dependence of electrontransfer between the porphyrin
四个固定距离的卟啉醌分子1-syn,1-anti,2-syn和2-anti,被合成。这些分子具有通过刚性戊烯间隔基连接到萘醌的5-苯基-10,15,20-三戊基卟啉锌电子供体。间隔基的中心苯环在1中未被取代,并在2中具有对二甲氧基取代基。萘醌在整个间隔基上与卟啉呈同位或反位。这些分子提供了有关卟啉和醌之间电子转移的取向依赖性以及这种转移对间隔基的低位离子态的依赖性的信息。萘醌氧化卟啉最低激发态的速率常数为1-syn:8.2 x 10 9 s -1 ; 1-anti:1.7 x 10 10s -1 ; 2同步:8.5 x 10 9 s -1 ; 2-anti:1.9×10 10 S -1。卟啉阳离子-萘醌阴离子重组反应的速率常数为1-syn:1.4 x 10 10 s -1 ; 1-anti:2.5 x 10 10 s -1 ; 2同步:5.0 x 10 10 s -1 ; 2反:8.2 x