Granville M F, Holtom G R, Kohler B E
Department of Chemistry, Wesleyan University, Middletown, Connecticut 06457.
Proc Natl Acad Sci U S A. 1980 Jan;77(1):31-3. doi: 10.1073/pnas.77.1.31.
Photoisomerization of the linear polyene 1,3,5,7-octatetraene has been observed in an n-hexane matrix maintained at the boiling point of helium. To a good approximation, only the trans,trans and cis,trans isomers participate in the photochemistry. These compounds have been unambiguously identified by comparing the observed high-resolution fluorescence spectra to those of chromatographically purified reference compounds. Although the quantum yield of this process is probably low, its microscopic rate seems to compete favorably with vibrational deactivation.
在保持在氦沸点的正己烷基质中观察到线性多烯1,3,5,7-辛四烯的光异构化。在很好的近似程度下,只有反式、反式和顺式、反式异构体参与光化学过程。通过将观察到的高分辨率荧光光谱与色谱纯化的参考化合物的光谱进行比较,已明确鉴定出这些化合物。尽管该过程的量子产率可能较低,但其微观速率似乎与振动失活竞争优势明显。