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论文类型： 期刊论文

发表时间： 2013-12-01

发表刊物： CHEMISTRY-AN ASIAN JOURNAL

收录刊物： SCIE、EI、Scopus

卷号： 8

期号： 12

页面范围： 3133-3141

ISSN号： 1861-4728

关键字： BODIPY; dyes; energy transfer; laser chemistry; rhodamine

摘要： This work deals with the synthesis and the photophysical and laser properties of new BODIPY-rhodamine cassettes. These dyads differ in their rigid and conjugated spacer group (phenyl or acetylenephenyl) and in their linking positions (meta or para). The photophysical properties of these cassettes are controlled by the formation/opening of the spirolactone ring, which, in turn, switches off/on an energy-transfer process between the chromophores. Herein, we thoroughly describe the influence of the attached spacer group, as well as the distance and orientation between the donor-acceptor pair, on the excitation energy transfer. The observed fast dynamics and efficiency suggest that the process mainly takes place through-bond, although the through-space mechanism also contributes to the whole process. As a result, efficient laser emission from the rhodamine is achieved upon excitation of the BODIPY, in particular for the cassette that contains an acetylenephenyl spacer group in a para disposition.