Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306-4390, USA.
Photochem Photobiol Sci. 2013 Oct;12(10):1754-60. doi: 10.1039/c3pp50064k.
In glassy isopentane at 77 K, 1-phenyl-4-(4-pyridyl)-cis-1,cis-3-butadiene (cc-PPyB) and 1-phenyl-4-(4-pyridyl)-cis-1,trans-3-butadiene (ct-PPyB) can undergo simultaneous two-bond photoisomerization. Under the same conditions, 1-phenyl-4-(4-pyridyl)-trans-1,cis-3-butadiene (tc-PPyB) gives tt-PPyB, the ultimate photoproduct in all cases.
在 77K 的无定形异戊烷中,1-苯基-4-(4-吡啶基)-顺式-1,顺式-3-丁二烯(cc-PPyB)和 1-苯基-4-(4-吡啶基)-顺式-1,反式-3-丁二烯(ct-PPyB)可以同时发生双键光异构化。在相同条件下,1-苯基-4-(4-吡啶基)-反式-1,顺式-3-丁二烯(tc-PPyB)生成 tt-PPyB,这是所有情况下的最终光产物。