Steroids as Molecular Photonic Wires. <i>Z </i>→ <i>E</i> Olefin Photoisomerization by Intramolecular Triplet−Triplet Energy Transfer with and without Intervening Olefinic Gates<sup>1</sup>
作者:Larry D. Timberlake、Harry Morrison
DOI:10.1021/ja9808595
日期:1999.4.1
3β-((dimethylphenylsilyl)oxy)-17-(Z)-ethylidene-6-methylene-5α-androstane (3a), and 3α-((dimethylphenylsilyl)oxy)-17-(Z)-ethylidene-6-methylene-5α-androstane (3b) have been prepared. The triplet−triplet excited-state energytransfer (TTET) that occurs from the C3 aryl “donor” group to the C17 ethylidene “acceptor” has been studied in detail at 10 mM steroid concentration. Irradiation with 266 nm light results