Synthesis of the Rhodamine B Derivatives with Fluorescence “Turn-on” Effect and Their Application to the Detection of Hg2+

doi:10.7517/j.issn.1674-0475.2013.06.421

Abstract

Abstract:

Based on the Hg²⁺-induced ring-open characteristic of spirolactam in Rhodamine derivatives, and followed by the fluorescence "turn-on" effect, novel fluorescent chemosensors 2-Thenaldehydealdehyde rhodamine B hydrazone (RhBTh) and Benzaldehyde rhodamine B hydrazone (RhBAr) had been designed and synthesized, and their application in the detection of Hg²⁺ were carried out. The results showed that both RhBTh and RhBAr exhibited good fluorescent enhancement toward Hg²⁺, and other metal ions showed no significant interference during the detection process. The detection limits were determined to be 7.8 nmol/L and 12.5 nmol/L, respectively. As a result, RhBTh and RhBAr showed good sensitivity and selectivity toward Hg²⁺.

Key words: Hg²⁺ detection, fluorescent chemosensor, rhodamine B, fluorescence enhancement, thiophilic

CLC Number:

YANG Bo, WU Wen-hui. Synthesis of the Rhodamine B Derivatives with Fluorescence “Turn-on” Effect and Their Application to the Detection of Hg²⁺[J]. Imaging Science and Photochemistry, 2013, 31(6): 421-429.

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Synthesis of the Rhodamine B Derivatives with Fluorescence “Turn-on” Effect and Their Application to the Detection of Hg²⁺

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