Journal of Photochemistry and Photobiology A: Chemistry p. 139 - 145 (2019)
Update date:2022-08-25
Topics:
Pham, Xuan-Qui
Kumar, Naresh
Ha-Thi, Minh-Huong
Leray, Isabelle
A highly selective fluorescent sensor based on salicylaldehyde azine derivative for the detection of uranyl cation was developed. The aggregation induced emission characteristics of obtained compounds were investigated and a strong emission of these derivatives was observed upon aggregation in organoaqueous solvent. The emission of these aggregated forms was found to be effectively quenched by uranyl cation. The effect of uranyl was shown to be destructive rather than constructive to the aggregation of the salicylaldehyde azine derivatives. An aggregate-breaking process was proposed to explain the destruction of the aggregates by the complexation with uranyl cation. The sensor showed good selectivity towards uranyl and with a low detection limit up to ppb scale, hence, can be used as an efficient fluorescent sensor for detecting uranyl cation in aqueous solvent.
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