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Proceedings Paper

Development of salicylidene derivatives as novel receptors for anion sensing and recognition
Author(s): Yousef Hijji; Gilbert Wairia
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Paper Abstract

Salicylidene derivatives have been developed as a new set of highly sensitive chromogenic and fluorogenic sensors for anions. A systematic synthesis and investigation of salicylidene derivatives reveals their complementarity with fluoride, acetate and phosphate ions, which can be utilized in anion-sensor binding. Synthesis of receptors proceeded at room temperature or by microwave irradiation, both achieving yields of 80-95 percent with a short reaction time. A substantially red-shifted fluorescence and absorption of receptors in acetonitrile was enhanced upon addition of fluoride, acetate and dihydrogen phosphate depending on the extent of conjugation, nature and the site of substituents in the system. Intense color change and high binding constants demonstrates high sensitivity for fluoride ions as compared to other anions that could allow detection under both visual and fluorescence emission conditions. Investigation of behavior of receptors with anions in different solvents reveals the interaction to be hydrogen bonding in nature.

Paper Details

Date Published: 11 November 2005
PDF: 12 pages
Proc. SPIE 6007, Smart Medical and Biomedical Sensor Technology III, 60070B (11 November 2005); doi: 10.1117/12.630809
Show Author Affiliations
Yousef Hijji, Morgan State Univ. (United States)
Gilbert Wairia, Morgan State Univ. (United States)

Published in SPIE Proceedings Vol. 6007:
Smart Medical and Biomedical Sensor Technology III
Brian M. Cullum; J. Chance Carter, Editor(s)

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