Highly selective circular dichroism sensor based on D-penicillamine/cysteamine-cadmium sulfide quantum dots for copper (II) ion detection

被引：32

作者：

Ngamdee, Kessarin ^{[1
,2
]}

Chaiendoo, Kanokwan ^{[1
,2
]}

Saiyasombat, Chatree ^{[3
]}

Busayaporn, Wutthikrai ^{[3
]}

Ittisanronnachai, Somlak ^{[4
]}

Promarak, Vinich ^{[5
]}

Ngeontae, Wittaya ^{[1
,2
,6
,7
]}

机构：

[1] Khon Kaen Univ, Dept Chem, Mat Chem Res Ctr, Khon Kaen 40002, Thailand

[2] Khon Kaen Univ, Ctr Excellence Innovat Chem, Fac Sci, Khon Kaen 40002, Thailand

[3] Synchrotron Light Res Inst, Nakhon Ratchasima 30000, Thailand

[4] Vidyasirimedhi Inst Sci & Technol, FRC, Wang Chan 21210, Rayong, Thailand

[5] Vidyasirimedhi Inst Sci & Technol, Sch Mol Sci & Engn, Wang Chan 21210, Rayong, Thailand

[6] Khon Kaen Univ, Res Ctr Environm & Hazardous Subst Management, Khon Kaen 40002, Thailand

[7] Ctr Excellence Environm & Hazardous Waste Managem, Bangkok 10330, Thailand

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2019年 / 211卷

关键词：

Chemical sensors; Chiral nanoparticles; Optical nanomaterials; Nanoparticles; Circular dichroism spectroscopy; FLUORESCENCE SENSOR; NATURAL-WATERS; CU2+; NANOCLUSTERS; AGGREGATION; ENHANCEMENT; OXIDATION;

D O I：

10.1016/j.saa.2018.12.027

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

A highly selective circular dichroism sensor based on cysteamine-capped cadmium sulfide quantum dots (Cys-CdS QDs) was successfully developed for the determination of Cu2+, Basically, the Cys-CdS QDs are not active in circular dichroism spectroscopy. However, the circular dichroism probe (DPA@Cys-CdS QDs) can be simply generated in situ by mixing achiral Cys-CdS QPs with D-penicillamine. The detection principle was based on measuring the circular dichroism signal change upon the addition of Cu2+. The strong CD signal of the DPA@Cys-CdS QPs dramatically decreased in the presence of Cu2+, while other cations did not result in any spectral changes. In addition, the degree of the CD signal decrease was linearly proportional to the concentration of Cu2+ in the range of 0.50-2.25 mu M (r(2) = 0.9919) with a detection limit of 0.34 mu M. Furthermore, the proposed sensor was applied to detect Cu2+ in drinking water samples with %recovery values of 102-114% and %RSD less than 6%. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：313 / 321

页数：9

共 38 条

[1] Cysteamine-capped copper nanoclusters as a highly selective turn-on fluorescent assay for the detection of aluminum ions [J].