Supramolecular Triplet Photosensitizer. Effects of the Cation Binding Mode on <i>E</i>−<i>Z</i> Isomerization of 1,2-Dichloroethylene
作者:Ken Kokubo、Kouji Kitasaka、Takumi Oshima
DOI:10.1021/ol060198d
日期:2006.4.1
cation recognition on photosensitized E-Z isomerization of 1,2-dichloroethylene have been investigated with two types of m,p- and o,o'-podand (oligo-oxyethylene unit) benzophenones 2 and 3. With increasing cation size, the %Z ratio at the photostationary state was changed from 67 to 91% for 2 but remained almost unchanged (86-88%) for 3. These results were interpreted in terms of the variation of excited
[反应:见正文]用两种类型的m,p-和o,o'-podand(低聚氧乙烯单元)二苯甲酮2和3研究了金属阳离子识别对1,2-二氯乙烯光敏EZ异构化的影响。随着阳离子尺寸的增加,光平稳态的%Z比值从2的67%变为91%,但对于3几乎保持不变(86-88%)。这些结果可以通过激发三重态能量E的变化来解释。 (T),与这些光敏剂2和3的阳离子络合有关。