View in EDS

Fluorescent silver nanoclusters for ultrasensitive determination of chromium(VI) in aqueous solution.

Saved in:
Bibliographic Details
Title: Fluorescent silver nanoclusters for ultrasensitive determination of chromium(VI) in aqueous solution.
Authors: Zhang, Jian Rong1, Zeng, Ai Lian1, Luo, Hong Qun1 luohq@swu.edu.cn, Li, Nian Bing1 linb@swu.edu.cn
Source: Journal of Hazardous Materials. Mar2016, Vol. 304, p66-72. 7p.
Subjects: Fluorescent lighting, Chromium, Aqueous solutions, Polyethyleneimine, Oxygen atom transfer reactions
Abstract: In this work, a simple and sensitive Cr(VI) sensor is proposed based on fluorescent polyethyleneimine-stabilized Ag nanoclusters, which allows the determination over a wide concentration range of 0.1 nM–3.0 μM and with a detection limit as low as 0.04 nΜ and a good selectivity. The quenching mechanism was discussed in terms of the absorption and fluorescence spectra, suggesting that Cr(VI) is connected to Ag nanoclusters by hydrogen bond between the oxygen atom at the vertex of tetrahedron structure of Cr(VI) and the amino nitrogen of polyethyleneimine that surrounded Ag nanoclusters and electron transfer from Ag nanoclusters to highly electron-deficient Cr(VI) results in fluorescence quenching. Despite the failure to quench the fluorescence efficiently, Cr(III) can also be measured using the proposed Ag nanoclusters by being oxidized to Cr(VI) in alkaline solution (pH ∼9) containing H 2 O 2 . Therefore, our approach could be used to detect Cr(VI), Cr(III) and the total chromium level in aqueous solution. In addition, Cr(VI) analysis in real water samples were satisfactory, indicating this method could be practically promising for chromium measurements. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Hazardous Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 111825275
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Fluorescent silver nanoclusters for ultrasensitive determination of chromium(VI) in aqueous solution.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Jian+Rong%22">Zhang, Jian Rong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zeng%2C+Ai+Lian%22">Zeng, Ai Lian</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Luo%2C+Hong+Qun%22">Luo, Hong Qun</searchLink><relatesTo>1</relatesTo><i> luohq@swu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Nian+Bing%22">Li, Nian Bing</searchLink><relatesTo>1</relatesTo><i> linb@swu.edu.cn</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+Hazardous+Materials%22">Journal of Hazardous Materials</searchLink>. Mar2016, Vol. 304, p66-72. 7p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Fluorescent+lighting%22">Fluorescent lighting</searchLink><br /><searchLink fieldCode="DE" term="%22Chromium%22">Chromium</searchLink><br /><searchLink fieldCode="DE" term="%22Aqueous+solutions%22">Aqueous solutions</searchLink><br /><searchLink fieldCode="DE" term="%22Polyethyleneimine%22">Polyethyleneimine</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+atom+transfer+reactions%22">Oxygen atom transfer reactions</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this work, a simple and sensitive Cr(VI) sensor is proposed based on fluorescent polyethyleneimine-stabilized Ag nanoclusters, which allows the determination over a wide concentration range of 0.1 nM–3.0 μM and with a detection limit as low as 0.04 nΜ and a good selectivity. The quenching mechanism was discussed in terms of the absorption and fluorescence spectra, suggesting that Cr(VI) is connected to Ag nanoclusters by hydrogen bond between the oxygen atom at the vertex of tetrahedron structure of Cr(VI) and the amino nitrogen of polyethyleneimine that surrounded Ag nanoclusters and electron transfer from Ag nanoclusters to highly electron-deficient Cr(VI) results in fluorescence quenching. Despite the failure to quench the fluorescence efficiently, Cr(III) can also be measured using the proposed Ag nanoclusters by being oxidized to Cr(VI) in alkaline solution (pH ∼9) containing H 2 O 2 . Therefore, our approach could be used to detect Cr(VI), Cr(III) and the total chromium level in aqueous solution. In addition, Cr(VI) analysis in real water samples were satisfactory, indicating this method could be practically promising for chromium measurements. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Hazardous Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=111825275
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.jhazmat.2015.10.036
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 7
        StartPage: 66
    Subjects:
      – SubjectFull: Fluorescent lighting
        Type: general
      – SubjectFull: Chromium
        Type: general
      – SubjectFull: Aqueous solutions
        Type: general
      – SubjectFull: Polyethyleneimine
        Type: general
      – SubjectFull: Oxygen atom transfer reactions
        Type: general
    Titles:
      – TitleFull: Fluorescent silver nanoclusters for ultrasensitive determination of chromium(VI) in aqueous solution.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Zhang, Jian Rong
      – PersonEntity:
          Name:
            NameFull: Zeng, Ai Lian
      – PersonEntity:
          Name:
            NameFull: Luo, Hong Qun
      – PersonEntity:
          Name:
            NameFull: Li, Nian Bing
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 05
              M: 03
              Text: Mar2016
              Type: published
              Y: 2016
          Identifiers:
            – Type: issn-print
              Value: 03043894
          Numbering:
            – Type: volume
              Value: 304
          Titles:
            – TitleFull: Journal of Hazardous Materials
              Type: main
ResultId 1