3 years ago

α-Amino Acid Derived Benzimidazole-Linked Rhodamines: A Case of Substitution Effect at the Amino Acid Site toward Spiro Ring Opening for Selective Sensing of Al3+ Ions

α-Amino Acid Derived Benzimidazole-Linked Rhodamines: A Case of Substitution Effect at the Amino Acid Site toward Spiro Ring Opening for Selective Sensing of Al3+ Ions
Utpal Ghosh, Debashis Sahu, Subhendu Mondal, Anupam Majumdar, Bishwajit Ganguly, Kumaresh Ghosh, Sourav Ghosh, Constantin G. Daniliuc
α-Amino acid derived benzimidazole-linked rhodamines 13 have been synthesized, and their efficacy in metal ion sensing has been evaluated. While l-valine- and l-phenylglycine-derived benzimidazole-based rhodamines 1 and 2 selectively recognize Al3+ in aqueous CH3CN (pH 7.0) by exhibiting color and “turn-on” emission changes, glycine-derived benzimidazole 3 is nonresponsive in the event and highlights the role of α-substitution of amino acid in the designs.

Publisher URL: http://dx.doi.org/10.1021/acs.inorgchem.7b00835

DOI: 10.1021/acs.inorgchem.7b00835

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