Abstract
In this paper, a class of [Cu(N-N)(PPh3)2]BF4 complexes were designed and discussed, where N-N and PPh3 stood for a diamine ligand and triphenylphosphane, respectively. Their molecular structures were confirmed and analyzed by single crystal analysis and density functional theory calculation. Photophysical measurement on these complexes suggested that their energy band gaps were increased by electron-pulling groups. In addition, it was found that their emission was sensitive towards molecular O2, making them potential oxygen sensors. Their oxygen sensing performance was tentatively discussed by doping them into a silica matrix MCM-41. Long emission lifetime and large conjugation plane were proved positive to improve sensing performance. High sensitivity, short response time and good photostability were observed.
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