| Urea-type ligand-modified CdSe quantum dots as a fluorescence "turn-on" sensor for CO3(2-) anions. | |
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MedLine Citation:
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PMID: 20714674 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A new fluorescence "turn-on" nanosensor for carbonate determination was reported based on CdSe quantum dots (QDs) modified with thio ligands containing urea groups: N-(5-mercapto-1,3,4-thiadiazol-2-ylcarbamoyl)-2-(o-tolyloxy)acetamide (AASH-CdSe QDs). The AASH-CdSe QDs were prepared through a ligand exchange process and characterized by transmission electron microscopy (TEM), fluorescence spectroscopy, UV-vis spectroscopy and FT-IR spectroscopy. The synthesized AASH-CdSe QDs allowed a selective fluorescence "turn-on" response towards carbonate. Under optimal conditions, the relative fluorescence intensity increases linearly with carbonate concentration in the range 1 x 10(-7)-1 x 10(-4) M with a detection limit of 2.3 x 10(-8) M. A Langmuir-type binding model was highly effective in describing the carbonate concentration dependence of the luminescence intensity of the AASH-CdSe QDs. The possible mechanism was discussed. |
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Authors:
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Cuiping Han; Zhimin Cui; Zhilong Zou; Sabahaiti; Demei Tian; Haibing Li |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-08-12 |
Journal Detail:
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Title: Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology Volume: 9 ISSN: 1474-9092 ISO Abbreviation: Photochem. Photobiol. Sci. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-08-25 Completed Date: 2010-12-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101124451 Medline TA: Photochem Photobiol Sci Country: England |
Other Details:
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Languages: eng Pagination: 1269-73 Citation Subset: IM |
Affiliation:
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Key Laboratory of Pesticide and Chemical Biology (CCNU), Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, PR China. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acetamides
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chemistry Anions / chemistry Cadmium Compounds / chemistry* Carbonates / analysis* Fluorescent Dyes / chemistry Ligands Quantum Dots* Selenium Compounds / chemistry* Spectrometry, Fluorescence / methods* Thiadiazoles / chemistry Urea / chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Acetamides; 0/Anions; 0/Cadmium Compounds; 0/Carbonates; 0/Fluorescent Dyes; 0/Ligands; 0/Selenium Compounds; 0/Thiadiazoles; 1306-24-7/cadmium selenide; 289-06-5/1,3,4-thiadiazole; 57-13-6/Urea; 60-35-5/acetamide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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