title: Chemically modified cellulose strips with pyridoxal conjugated red fluorescent gold nanoclusters for nanomolar detection of mercuric ions.
abstract: One-pot approach was adopted for the synthesis of highly luminescent near-infrared (NIR)-emitting gold nanoclusters (AuNCs) using bovine serum albumin (BSA) as a protecting agent. The vitamin B6cofactor pyridoxal was conjugated with the luminescent BSA-AuNCs through the free amines of BSA and then employed for the nanomolar detection of Hg2+in aqueous medium via selective fluorescence quenching of AuNCs. This nano-assembly was successfully applied for the real sample analysis of Hg2+in fish, tap water and river water. The study also presents chemically-modified cellulosic paper strips with the pyridoxal conjugated BSA-AuNCs for detecting Hg2+ion up to 1nM.
authors.affiliation: Department of Applied Chemistry, SV National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Shilpa
authors.initials: S
authors.lastname: Bothra
authors.affiliation: Department of Applied Chemistry, SV National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Yachana
authors.initials: Y
authors.lastname: Upadhyay
authors.affiliation: Department of Applied Chemistry, SV National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Rajender
authors.initials: R
authors.lastname: Kumar
authors.affiliation: Materials Chemistry Division, School of Advanced Sciences, VIT University, Vellore 632014, India.
authors.forename: S K
authors.initials: SK
authors.lastname: Ashok Kumar
authors.affiliation: Department of Applied Chemistry, SV National Institute of Technology (SVNIT), Surat 395007, India. Electronic address: suban_sahoo@rediffmail.com.
authors.forename: Suban K
authors.initials: SK
authors.lastname: Sahoo
mesh_terms: D000818:Animals; D015374:Biosensing Techniques; D002417:Cattle; D002482:Cellulose / Q000737:chemistry; D005399:Fishes; D005504:Food Analysis; D006046:Gold / Q000737:chemistry; D008628:Mercury / Q000737:chemistry / Q000302:isolation & purification*; D053768:Metal Nanoparticles / Q000737:chemistry*; D011730:Pyridoxal / Q000737:chemistry; D012710:Serum Albumin, Bovine / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D014874:Water Pollutants, Chemical; D012710:Serum Albumin, Bovine; D011730:Pyridoxal; D006046:Gold; D002482:Cellulose; D008628:Mercury
keywords: Chemically modified cellulose strips; Nanomolar detection; Near-infrared (NIR)-emission; Pyridoxal conjugated gold nanoclusters; Turn-off sensing of Hg(2+)