作者:Rafi Korenstein、Karol A. Muszkat、Ernst Fischer
DOI:10.1039/p29770000564
日期:——
The photochemistry of 10,H,10′H-bianthrylidene was extensively studied over a wide temperature range. Two photoisomers, C and E, are formed, both reverting thermally to the parent modification A. The C isomer is a cyclization product of the 4a,4b-dihydrophenanthrene type, whereas the E isomer results from cis–trans-isomerization about the central double bond together with additional torsions about
的10的光化学,ħ,10' ħ -bianthrylidene被广泛地研究在宽的温度范围内。形成了两个光异构体C和E,它们都热还原成母体A。C异构体是4a,4b-二氢菲类型的环化产物,而E异构体是由中心双键的顺式-反式异构化产生的与9,9'-乙烯系统的四个单键的附加扭转在一起。A,E和C修饰被原子碘氧化。荧光的量子产率与温度的相关性表明,系统间交叉是在某个临界温度以上(约3 ℃)的激活过程。–130°),并在较低温度下未激活。C改性由激发的单重态和E异构体从三重态形成。