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本文首次报道了将敏化和猝灭同时偶合在同一体系中的敏化/猝灭室温烘燐新方法.体系中,CTAB胶束一方面增强α-溴代萘的室温燐光发射、α-溴代萘和联乙酰的三重态-三重态能量转移效率,另一方面起到猝灭α-溴代萘敏化联乙酰发射的室温燐光的作用.CTAB对联乙酰的猝灭反应由三重态-三重态能量转移速率限制,求得α-溴代萘敏化联乙酰的三重态-三重态能量转移速率常数为1.76×10~9(mol·dm~(-3)~(-1)S~(-1),CTAB对联乙酰的猝灭常数为7.82×10~7(mol·dm~(-3)~(-1)S~(-1).详细研究了实验条件,实现了猝灭法测定联乙酰,检测限达2.8×10~(-8)mol·dm~(-3).
In this paper, we report for the first time a new method of sensitization and quenching simultaneous sensitization and quenching in the same system at room temperature, in which CTAB micelles enhance the room-temperature photoluminescence of α-bromonaphthalene and α-bromine Naphthalene and biacetyl triplet state - triplet energy transfer efficiency, on the other hand play the role of quenching α-bromonaphthalene sensitized birefringence emission at room temperature cataract.CTAB quenching biacetyl by the triplet - triple The energy transfer rate constants of α-bromonaphthalene sensitized biacetyl are 1.76 × 10 ~ 9 (mol · dm -3 ~ -1) S ~ (-1) -1), and the quenching constant of CTAB was 7.82 × 10 ~ 7 (mol · dm -3 ~ -1) S -1. The experimental conditions were studied in detail and the quenching method The detection limit of diacetyl was 2.8 × 10 ~ (-8) mol · dm -3.