title: Applications of vitamin B6 cofactor pyridoxal 5'-phosphate and pyridoxal 5'-phosphate crowned gold nanoparticles for optical sensing of metal ions.
abstract: Vitamin B6 cofactor pyridoxal 5'-phosphate (PLP) and PLP crowned gold nanoparticles (PLP-AuNPs) was applied for the optical chemosensing of metal ions in aqueous medium. PLP showed a visually detectable colour change from colourless to yellow and 'turn-off' fluorescence in the presence of Fe3+. The fluorescence intensity of PLP at 433nm was also blue-shifted and enhanced at 395nm upon addition of Al3+. When the PLP was functionalized over AuNPs surface, the wine red colour of PLP-AuNPs was turned to purplish-blue and the SPR band at ~525nm was red-shifted upon addition of Al3+, Cd2+and Pb2+due to the complexation-induced aggregation of nanoparticles. The developed sensing systems exhibited good selectivity and specificity for the detected analytes (Fe3+, Al3+, Cd2+and Pb2+).
authors.affiliation: Department of Applied Chemistry, S.V. National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Shilpa
authors.initials: S
authors.lastname: Bothra
authors.affiliation: Department of Applied Chemistry, S.V. National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Yachana
authors.initials: Y
authors.lastname: Upadhyay
authors.affiliation: Department of Applied Chemistry, S.V. National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Rajender
authors.initials: R
authors.lastname: Kumar
authors.affiliation: Department of Applied Chemistry, S.V. National Institute of Technology (SVNIT), Surat 395007, India. Electronic address: suban_sahoo@rediffmail.com.
authors.forename: Suban K
authors.initials: SK
authors.lastname: Sahoo
keywords: Functionalized gold nanoparticles; Multiple-metal ions; Optical sensing; Pyridoxal 5′-phosphate; Vitamin B6 cofactor