Naphthalene based colorimetric sensor for bioactive anions: experimental and DFT study.
A simple anion selective colorimetric sensor L has been designed by combining 2-hydroxy-1-naphthaldehyde with 2-aminothiophenol. Sensor L portrayed a necked-eye detectable color change from light green to red upon addition of AcO(-), F(-) and H(2)PO(4)(-) anions in CH(3)CN, where as no significant color change was observed upon addition of other anions such as Cl(-), Br(-), I(-) and HSO(4)(-). Sensor L showed selectivity towards AcO(-) under competitive environment, with a detection limit (3σ/S) down to 1.1×10(-7) M. In addition, the anion sensing ability of L was explored in mixed H(2)O/CH(3)CN (v/v) medium. Further, the nature of interactions between the sensor L and AcO(-) was investigated by (1)H NMR and the probable structure of the L-AcO(-) complex was predicted by B3LYP/6-31G(d,p) method.
Department of Applied Chemistry, S.V. National Institute of Technology (SVNIT), Surat, Gujrat, India.
Darshna
D
Sharma
Rati Kanta
RK
Bera
Suban K
SK
Sahoo
D000085:Acetates / Q000032:analysis*; D000814:Aniline Compounds / Q000737:chemistry*; D000838:Anions / Q000032:analysis*; D003124:Colorimetry / Q000379:methods*; D057230:Limit of Detection; D009281:Naphthalenes / Q000737:chemistry*
D000085:Acetates; D000814:Aniline Compounds; D000838:Anions; D009281:Naphthalenes; C005464:2-aminothiophenol; C062247:2-hydroxy-1-naphthaldehyde