A remarkable enhancement of luminescence is observed in a solution of the TbIII complex 1 upon adding ZnII ions (see picture). Complex 1 has a high selectivity for ZnII and a long luminescence lifetime of the order of milliseconds, thus is an excellent lead compound for the development of ZnII-sensitive luminescent chemosensors with long luminescence lifetimes. A=light absorption, ET=energy transfer, E=light emission.
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Hanaoka et al. (2003) studied this question.
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