[1]杨传孝,孙向英.三聚磷酸钠稳定硫化镉量子点荧光猝灭法测定痕量铁[J].华侨大学学报(自然科学版),2011,32(5):537-542.[doi:10.11830/ISSN.1000-5013.2011.05.0537]
　YANG Chuan-xiao,SUN Xiang-ying.Sodium Tripolyphosphate-Stabilized CdS QDs of Trace Iron by Fluorescence Quenching Method[J].Journal of Huaqiao University(Natural Science),2011,32(5):537-542.[doi:10.11830/ISSN.1000-5013.2011.05.0537]
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三聚磷酸钠稳定硫化镉量子点荧光猝灭法测定痕量铁()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第32卷
期数:
2011年第5期
页码:
537-542
栏目:
出版日期:
2011-09-20

文章信息/Info

Title:
Sodium Tripolyphosphate-Stabilized CdS QDs of Trace Iron by Fluorescence Quenching Method
文章编号:
1000-5013(2011)05-0537-06
作者:
杨传孝; 孙向英
华侨大学材料科学与工程学院
Author(s):
YANG Chuan-xiao;  SUN Xiang-ying
College of Material Science and Engineering, Huaqiao University, Quanzhou 362021, China
关键词:
三聚磷酸钠;  CdS量子点;  亚铁离子;  荧光猝灭
Keywords:
sodium tripolyphosphate;  CdS QDs;  iron(Ⅱ);  fluorescence quenching
分类号:
O657.31; O614.811
DOI:
10.11830/ISSN.1000-5013.2011.05.0537
文献标志码:
A
摘要:
以三聚磷酸钠(STPP)为稳定剂,硫脲为硫源,在碱性介质中成功合成分散较均匀、水溶性好、半峰宽为25 nm左右的CdS量子点(QDs).研究三聚磷酸钠和硫脲的用量、反应时间及pH值等条件对CdS QDs发射光谱特性的影响.以该纳米粒子作为离子探针,建立测定痕量Fe2+的荧光猝灭方法.结果表明:在0.02~1.20μmol.L-1范围内,Fe2+对STPP-CdS QDs荧光猝灭符合Stern-Volmer方程,483 nm处F0/F与Fe2+呈现良好的线性关系,检测限为6.7 nmol.L-1; 对于实际矿泉水样中Fe的测定,其相对标准偏差为2.2%~3.8%,回收率为95.0%~105.0%.
Abstract:
The uniform dispersion and water-soluble CdS quantum dots(QDs) stabilized by sodium tripolyphosphate(STPP) were successfully synthesized in an alkaline medium,where the S2-was obtained from thiourea.The half peak width of CdS QDs was about 25 nm.The fluorescence spectral properties of CdS QDs with varying adding amount of STPP and thiourea,pH values,and reaction time were investigated.By the STPP-CdS QDs as ion probe,a new fluorescence quenching method for the determination of trace iron(Ⅱ) was developed.The fluorescence quenching results followed the Stern-Volmer equation,and the values of F0/F at 483 nm is linearly proportional to the concentration of Fe2+ from 0.02~1.20 μmol·L-1.The detection limit of the developed method was 6.7 nmol·L-1 for Fe2+.Mineral water samples were analyzed with the relative standard deviation(RSD) of 2.2%~3.8% and the recovery of 95.0%~105.0%.

参考文献/References:

[1] COSTA-FERN(A)NDEZ J M, PEREIRO R, SANZ-MEDEL A. The use of luminescent quantum dots for optical sensing [J]. Trends in Analytical Chemistry, 2006(3):207-218.doi:10.1016/j.trac.2005.07.008.
[2] ZHAO Dan, CHAN W H, HE Zhi-ke. Quantum dot-ruthenium complex dyads:Recognition of double-strand DNA through dual-color fFluorescence fetection [J]. Analytical Chemistry, 2009(9):3537-3543.doi:10.1021/ac9000892.
[3] CHEN Wen-bin, WANG Xin, TU Xi-juan. Water-soluble off-on spin-labeled quantum-dots conjugate [J]. Smal1, 2008(6):759-764.doi:10.1002/smll.200700788.
[4] CHEN Chun-yen, CHENG Chiu-ting, LAI Chih-wei. Potassium ion recognition by 15-crown-5 functionalized CdSe/ZnS quantum dots in H2O [J]. Chemical Communications, 2006(3):263-265.doi:10.1039/b512677k.
[5] CAI Zhao-xia, YANG Hong, ZHANG Yi. Preparation, characterization and evaluation of water-soluble L-cysteine-capped-CdS nanoparticles as fluorescence probe for detection of Hg(Ⅱ) in aqueous solution [J]. Analytica Chimica Acta, 2006(2):234-239.doi:10.1016/j.aca.2005.11.061.
[6] CHEN Jin-long, ZHU Chang-qing. Functionalized cadmium sulfide quantum dots as fluorescence probe for silver ion determination [J]. Analytica Chimica Acta, 2005(2):147-153.doi:10.1016/j.aca.2005.05.006.
[7] GATT(A)S-ASFURA M K, LEBLANC R M. Peptide-coated CdS quantum dots for the optical detection of copper (Ⅱ) and silver(I) [J]. Chemical Communications, 2003, (21):2684-2685.
[8] 温福宇, 杨金辉, 宗旭. 太阳能光催化制氢研究进展 [J]. 化学进展, 2009, (11):2285-2302.
[9] ROGACH A L, FRANZL T, KLAR T A. Aqueous synthesis of thiol-capped CdTe nanocrystals:State-of-theart [J]. Journal of Physical Chemistry C, 2007, (40):14628-14637.
[10] 刘迪, 程伟青, 严拯宇. 硫化镉纳米粒子的合成及荧光猝灭法测定Cu2+的初步研究 [J]. 分析化学, 2007(6):825-829.doi:10.3321/j.issn:0253-3820.2007.06.009.
[11] 刘辉, 李文友, 尹洪宗. CdS纳米粒子制备的影响因素及CdS纳米粒子-酚藏花红体系的光谱特性 [J]. 化学学报, 2005(4):301-306.doi:10.3321/j.issn:0567-7351.2005.04.009.
[12] CHEN Yong-fen, ROSENZWEIG Z. Luminescent CdS quantum dots as selective ion probes [J]. Analytical Chemistry, 2002, (19):5132-5138.
[13] YU W W, QU Lian-hua, GUO Wen-zhuo. Experimental determination of the extinction coefficient of CdTe, CdSe, and CdS nanocrystals [J]. Chemistry of Materials, 2003, (14):2854-2860.doi:10.1021/cm034081k.

备注/Memo

备注/Memo:
国家自然科学基金资助项目(20955001); 国务院侨务科研基金资助项目(09QZR05); 福建省自然科学基金资助项目(D0810016); 华侨大学科研基金资助项目(JB-ZR1118)
更新日期/Last Update: 2014-03-23