Recognition of carboxylate anions and carboxylic acids by selenium-based new chromogenic fluorescent sensor: a remarkable fluorescence enhancement of hindered carboxylates.
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.
Goswami
Shyamaprosad
S
Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah 711103, West Bengal, India. spgoswamical@yahoo.com
Hazra
Anita
A
Chakrabarty
Rinku
R
Fun
Hoong-Kun
HK
D002264:Carboxylic Acids / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D016566:Organoselenium Compounds / Q000737:chemistry*
C545154:5-pivaloylamino-1,2,5-selenodiazolo(3,4-d)pyrimidin-7-(6H)-one; D002264:Carboxylic Acids; D005456:Fluorescent Dyes; D016566:Organoselenium Compounds