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Confused, but not dazed: Totally in contrast to SnIV complexes of normal porphyrins, SnIV complexes of N-confused oxoporphyrins can strongly bind halides at the axial position with pronounced fluorescence enhancement (see scheme; Ar=Ph, p-CF3C6H4, p-CH3C6H4) and can thus be regarded as a novel prototype of fluorescence halide sensors.
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Xie et al. (2006) studied this question.
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