NDLI: Copper nanoclusters as an on-off-on fluorescent probe for ascorbic acid

Content Provider	Springer Nature Link
Author	Rao, Hanbing Ge, Hongwei Lu, Zhiwei Liu, Wei Chen, Ziqi Zhang, Zhaoyi Wang, Xianxiang Zou, Ping Wang, Yanying He, Hua Zeng, Xianying
Copyright Year	2016
Abstract	We report that copper nanoclusters (CuNCs) represent a viable fluorescent probe for ascorbic acid. The CuNCs were stabilized by tannic acid and characterized by high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, UV–vis, time-correlated single photon counting and fluorescence spectroscopy. It is found that the fluorescence of CuNCs (at excitation/emission peaks of 355/430 nm) is quenched by ferric ion due to electron-transfer between CuNCs and Fe(III) ions. If ascorbic acid is added, Fe(III) is reduced to Fe(II) and quenching is suppressed. The process is completed within 5 min. Under optimal conditions, a linear relation exists between fluorescence recovery and the concentration of ascorbic acid in the 0.5 μM to 10 μM concentration range. The detection limit is 0.11 μM. The method was applied to the determination of ascorbic acid in (spiked) fruit and vegetables and gave recoveries ranging from 89 to 110 %. Graphical abstract The fluorescence of tannic acid stabilized copper nanoclusters (TA-CuNCs) is quenched by Fe3+. Upon addition of ascorbic acid (AA), the redox reaction between Fe3+ and ascorbic acid converts Fe3+ to Fe2+, and this results in a dramatic fluorescence enhancement of the probe.
Starting Page	1651
Ending Page	1657
Page Count	7
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	183
Issue Number	5
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2016-02-25
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fluorescence recovery Electron transfer Ferric iron Food analysis Quenching Nanomaterial Nanochemistry Nanotechnology Characterization and Evaluation of Materials Analytical Chemistry Microengineering
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Copper nanoclusters coated with bovine serum albumin as a regenerable fluorescent probe for copper(II) ion

Copper nanocluster-based fluorescent probe for hypochlorite

Biocompatible glutathione-capped gold nanoclusters for dual fluorescent sensing and imaging of copper(II) and temperature in human cells and bacterial cells

Graphene quantum dots as on-off-on fluorescent probes for chromium(VI) and ascorbic acid

Organic semiconductor polymer nanodots as a new kind of off-on fluorescent probe for sulfide

Synthesis of cysteine-functionalized water-soluble luminescent copper nanoclusters and their application to the determination of chromium(VI)

Graphene quantum dots combined with copper(II) ions as a fluorescent probe for turn-on detection of sulfide ions

Synthesis of peptide templated copper nanoclusters for fluorometric determination of Fe(III) in human serum

Carbon dots doped with nitrogen and sulfur and loaded with copper(II) as a “turn-on” fluorescent probe for cystein, glutathione and homocysteine

Copper nanoclusters as an on-off-on fluorescent probe for ascorbic acid

Similar Documents

Copper nanoclusters coated with bovine serum albumin as a regenerable fluorescent probe for copper(II) ion

Copper nanocluster-based fluorescent probe for hypochlorite

Biocompatible glutathione-capped gold nanoclusters for dual fluorescent sensing and imaging of copper(II) and temperature in human cells and bacterial cells

Graphene quantum dots as on-off-on fluorescent probes for chromium(VI) and ascorbic acid

Organic semiconductor polymer nanodots as a new kind of off-on fluorescent probe for sulfide

Synthesis of cysteine-functionalized water-soluble luminescent copper nanoclusters and their application to the determination of chromium(VI)

Graphene quantum dots combined with copper(II) ions as a fluorescent probe for turn-on detection of sulfide ions

Synthesis of peptide templated copper nanoclusters for fluorometric determination of Fe(III) in human serum

Carbon dots doped with nitrogen and sulfur and loaded with copper(II) as a “turn-on” fluorescent probe for cystein, glutathione and homocysteine

Copper nanoclusters as an on-off-on fluorescent probe for ascorbic acid