New fluorescent and colorimetric chemosensors based on the rhodamine and boronic acid groups for the detection of Hg2+

Sook Kyung Kim, K. M.K. Swamy, So Young Chung, Ha Na Kim, Min Jung Kim, Yongsuk Jeong, Juyoung Yoon

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82 Scopus citations

Abstract

Novel rhodamine B (RB) derivatives bearing mono and bis-boronic acid groups were investigated as Hg2+ selective fluorescent and colorimetric sensors. These derivatives are first examples of reversible fluorescent chemosensors for Hg2+ which utilized boronic acid groups as binding sites. Two new RB-boronic acid derivatives displayed selective 'Off-On'-type fluorescent enhancements and distinct color changes with Hg2+. Selective fluorescent enhancement of two rhodamine derivatives was attributed to ring opening from the spirolactam (nonfluorescent) to ring-opened amide (fluorescent).

Original languageEnglish
Pages (from-to)3286-3289
Number of pages4
JournalTetrahedron Letters
Volume51
Issue number25
DOIs
StatePublished - 23 Jun 2010

Bibliographical note

Funding Information:
This work was supported by the Basic Science Research Program (20090083065) through the National Research Foundation of Korea (NRF) and the Converging Research Center Program through NRF funded by the Ministry of Education, Science and Technology (2009-0093677). Mass spectral data were obtained from the Korea Basic Science Institute (Daegu) on a Jeol JMS 700 high resolution mass spectrometer.

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