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.
研究人员制备了一系列共轭多炔卟啉,其中卟啉大环通过芳香环直接与二元多炔的一端相连,并研究了它们的光谱行为。由芳基和共轭三键系统组成的二芳基多炔具有刚性和线性结构,两个发色团保持固定的几何形状和确定的距离。这些化合物的紫外-可见吸收光谱显示出很强的共轭作用,随着乙炔键数目的增加,光谱变宽,卟啉索雷特带略有红移。从它们的荧光激发光谱可以估算出从聚炔分子到卟啉分子的能量传递效率。无论它们的取代位置、几何形状和取向如何,能量传递效率几乎都是相同的。