title: One-step green synthetic approach for the preparation of multicolor emitting copper nanoclusters and their applications in chemical species sensing and bioimaging.
abstract: One-step green microwave synthetic approach was developed for the synthesis of copper nanoclusters (Cu NCs) and used as a fluorescent probe for the sensitive detection of thiram and paraquat in water and food samples. Unexpectedly, the prepared Cu NCs exhibited strong orange fluorescence and showed emission peak at 600 nm, respectively. Under optimized conditions, the quenching of Cu NCs emission peak at 600 nm was linearly proportional to thiram and paraquat concentrations in the ranges from 0.5 to 1000 µM, and from 0.2 to 1000 µM, with detection limits of 70 nM and 49 nM, respectively. In addition, bioimaging studies against Bacillus subtilis through confocal fluorescence microscopy indicated that Cu NCs showed strong blue and green fluorescence signals, good permeability and minimum toxicity against the various bacteria species, which demonstrates their potential feasibility for chemical species sensing and bioimaging applications.
authors: Department of Applied Chemistry, S.V. National Institute of Technology, Surat 395007, India.
authors: Jigna R
authors: JR
authors: Bhamore
authors: Gujarat Agricultural Biotechnology Institute, Navsari Agricultural University, Surat 395007, India.
authors: Sanjay
authors: S
authors: Jha
authors: Department of Chemistry, National Institute of Technology Andhra Pradesh, West Godavari, Tadepalligudam 534101, Andhra Pradesh, India.
authors: Anil Kumar
authors: AK
authors: Mungara
authors: Analytical Chemistry Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India.
authors: Rakesh Kumar
authors: RK
authors: Singhal
authors: Department of Applied Chemistry, S.V. National Institute of Technology, Surat 395007, India.
authors: Dhanshri
authors: D
authors: Sonkeshariya
authors: Department of Applied Chemistry, S.V. National Institute of Technology, Surat 395007, India. Electronic address: sureshkumarchem@gmail.com.
authors: Suresh Kumar
authors: SK
authors: Kailasa
mesh_terms: D015374:Biosensing Techniques; D003300:Copper / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry; D057230:Limit of Detection; D053768:Metal Nanoparticles / Q000737:chemistry; D010269:Paraquat / Q000737:chemistry / Q000302:isolation & purification*; D013050:Spectrometry, Fluorescence; D013893:Thiram / Q000737:chemistry / Q000302:isolation & purification*; D014867:Water / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D014867:Water; D013893:Thiram; D003300:Copper; D010269:Paraquat
keywords: Cu NCs; Fluorescence; Paraquat; Thiram; UV-visible and Fluorescence Spectrometry