Tehfe Mahamad-Ali, Blanchard Nicolas, Fries Cedric, Lalevée Jacques, Allonas Xavier, Fouassier Jean Pierre
Department of Photochemistry, CNRS, University of Haute Alsace, ENSCMu, 68093 Mulhouse Cedex, France.
Macromol Rapid Commun. 2010 Mar 2;31(5):473-8. doi: 10.1002/marc.200900695. Epub 2009 Dec 1.
The ability of a bis(germyl)ketone Ph(3) GeCOGePh(3) to act as a photoinitiator of free radical polymerization under visible light is investigated. The results suggest that this compound could be the starting point of a new high performance class of photoinitiators. The excited state processes, as well as the generation and the reactivity of the germyl radicals, are studied by laser flash photolysis, ESR spin trapping experiments, and molecular orbital calculations; they are compared to the results obtained on a mono- (germyl)ketone CH(3) COGePh(3) . Time dependent density functional theory calculations allow discussion of the strongly red-shifted ground state absorption of Ph(3) GeCOGePh(3) .
研究了双（锗基）酮Ph(3)GeCOGePh(3)在可见光下作为自由基聚合光引发剂的能力。结果表明，该化合物可能是一类新型高性能光引发剂的起点。通过激光闪光光解、电子顺磁共振自旋捕获实验和分子轨道计算研究了激发态过程以及锗基自由基的产生和反应性；并将其与单（锗基）酮CH(3)COGePh(3)的结果进行了比较。含时密度泛函理论计算有助于讨论Ph(3)GeCOGePh(3)基态吸收的强烈红移现象。
