Premium
Bis(germyl)ketones: Toward a New Class of Type I Photoinitiating Systems Sensitive Above 500 nm?
Author(s) -
Tehfe MahamadAli,
Blanchard Nicolas,
Fries Cedric,
Lalevée Jacques,
Allonas Xavier,
Fouassier Jean Pierre
Publication year - 2010
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200900695
Subject(s) - class (philosophy) , polymer science , polymer chemistry , materials science , chemistry , chemical engineering , engineering , philosophy , epistemology
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 .