Recent developments in fluorescence microscopy call for novel small-molecule-based labels with multiple functionalities to satisfy different experimental requirements. A current limitation in the advancement of live-cell single-molecule localizationmicroscopy is the high excitation power required to induce blinking. This is in marked contrast to the minimal phototoxicity required in live-cell experiments
Synthesis and Spectroscopic Investigation of Directly Conjugated Polyyne Porphyrins
作者:Kazuhiro Maruyama、Shigeki Kawabata
DOI:10.1246/bcsj.62.3498
日期:1989.11
A series of conjugated polyyne porphyrin, in which porphyrin macrocycle is directly connected with one end of diarylpolyyne through aromatic ring, has been prepared and their spectroscopic behaviors were investigated. Diarylpolyynes consisting of aryl group and conjugated triple bond system have rigid and linear structure, and the two chromophores are held at a fixed geometry and a determined distance. The UV-vis absorption spectra of these compounds showed strong conjugative interaction, showing broadening of their spectra and slightly red shifted porphyrin Soret bands with increasing the number of acetylenic bond. From their fluorescence excitation spectra energy transfer efficiencies from polyyne moiety to porphyrin moiety were estimated. The energy transfer efficiencies were almost unity regardless of their substituted position, geometry, and orientation.