Recognition of Carboxylate Anions and Carboxylic Acids by Selenium-Based New Chromogenic Fluorescent Sensor: A Remarkable Fluorescence Enhancement of Hindered Carboxylates

• Published in: Organic letters Vol. 11; no. 19; pp. 4350 - 4353
• Main Authors: Goswami, Shyamaprosad, Hazra, Anita, Chakrabarty, Rinku, Fun, Hoong-Kun
• Format: Journal Article
• Language: English
• Published: WASHINGTON American Chemical Society 01.10.2009; Amer Chemical Soc
• Subjects: Carboxylic Acids - chemistry; Chemistry; Chemistry, Organic; Crystallography, X-Ray; Fluorescence; Fluorescent Dyes - chemistry; Models, Molecular; Molecular Structure; Organoselenium Compounds - chemistry; Physical Sciences; Science & Technology; APOPTOSIS; CHEMOSENSORS; BIS-CARBOXYLATES; HIGHLIGHTS; RECEPTORS; DERIVATIVES; CANCER; FLUORIDE
• ISSN: 1523-7060; 1523-7052; 1523-7052
• DOI: 10.1021/ol901737s

A selenium metal-based new fluorescence sensor 5-pivaloylamino-1,2,5-selenodiazolo[3,4-d]pyrimidin-7-(6H)-one (receptor 1) has been reported for the recognition of monocarboxylic acids and carboxylate anions both by UV−vis and fluorescence methods. Receptor 1 recognizes carboxylate anions more than monocarboxylic acids and it is a selective sensor for carboxylates with specially hindered carboxylate anions. The changes of fluorescence intensity are remarkably enhanced with red shift in presence of bulky carboxylate anions. The X-ray crystal structure of receptor 1 with pivalic acid has been reported.