A highly selective turn-on colorimetric and luminescence sensor based on a triphenylamine-appended ruthenium(II) dye for detecting mercury ion

Citation: Su-Hua Fan, Jie Shen, Hai Wu, Ke-Zhi Wangb, An-Guo Zhang. A highly selective turn-on colorimetric and luminescence sensor based on a triphenylamine-appended ruthenium(II) dye for detecting mercury ion[J]. Chinese Chemical Letters, 2015, 26(5): 580-584. doi: 10.1016/j.cclet.2014.11.031 shu

A highly selective turn-on colorimetric and luminescence sensor based on a triphenylamine-appended ruthenium(II) dye for detecting mercury ion

基金项目:

the Natural Science Foundation of Anhui Province (No. 1408085QB39) (No. 1408085QB39)

the Natural Science Foundation of Sichuan Provincial Department of Education (No. 13ZB0056) (No. 13ZB0056)

摘要: A dual colorimetric and luminescent sensor based on a heteroleptic ruthenium dye [Ru(Hipdpa)(Hdcbpy)(NCS)₂]^-·0.5H⁺0.5[N(C₄H₉)₄]+ Ru(Hipdpa) {where Hdcbpy = monodeprotonted-4,4'-dicarboxy-2,2'- bipyridine and Hipdpa = 4-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)-N,N-diphenylaniline} for selective detection of Hg²⁺ is presented. The results of spectrophotometric titrations revealed an evident luminescence intensity enhancement (I/I₀ = 11) and a considerable blue shift in visible absorption and luminescence maxima with the addition of Hg²⁺. The sensitive response of the optical sensor on Hg²⁺ was attributed to the binding of the electron-deficient Hg²⁺ to the electron-rich sulfur atom of the thiocyanate (NCS) ligand in the Ru(Hipdpa), which led to an increase in the energy gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO). Accordingly, the blue shift in the absorption spectrum of Ru(Hipdpa) due to the binding of Hg²⁺ was obtained. Ru(Hipdpa) was found to have decreased Hg²⁺ detection limit and improved linear region as compared to di(tetrabutylammonium) cis-bis(isothiocyanato)bis(2,2'-bipyridine-4-carboxylic acid-4'- carboxylate)ruthenium(II) N719. Moreover, a dramatic color change from pink to yellow was observed, which allowed simple monitoring of Hg²⁺ by either naked eyes or a simple colorimetric reader. Therefore, the proposed sensor can provide potential applications for Hg²⁺ detection.

关键词:

English

A highly selective turn-on colorimetric and luminescence sensor based on a triphenylamine-appended ruthenium(II) dye for detecting mercury ion

1.
a School of Chemical and Materials Engineering, Fuyang Normal College, Fuyang 236037, China;
2.
b College of Chemistry, Beijing Normal University, Beijing 100875, China;
3.
c College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
Received Date: 15 September 2014
Available Online: 26 November 2014
Fund Project:

Abstract: A dual colorimetric and luminescent sensor based on a heteroleptic ruthenium dye [Ru(Hipdpa)(Hdcbpy)(NCS)₂]^-·0.5H⁺0.5[N(C₄H₉)₄]+ Ru(Hipdpa) {where Hdcbpy = monodeprotonted-4,4'-dicarboxy-2,2'- bipyridine and Hipdpa = 4-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)-N,N-diphenylaniline} for selective detection of Hg²⁺ is presented. The results of spectrophotometric titrations revealed an evident luminescence intensity enhancement (I/I₀ = 11) and a considerable blue shift in visible absorption and luminescence maxima with the addition of Hg²⁺. The sensitive response of the optical sensor on Hg²⁺ was attributed to the binding of the electron-deficient Hg²⁺ to the electron-rich sulfur atom of the thiocyanate (NCS) ligand in the Ru(Hipdpa), which led to an increase in the energy gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO). Accordingly, the blue shift in the absorption spectrum of Ru(Hipdpa) due to the binding of Hg²⁺ was obtained. Ru(Hipdpa) was found to have decreased Hg²⁺ detection limit and improved linear region as compared to di(tetrabutylammonium) cis-bis(isothiocyanato)bis(2,2'-bipyridine-4-carboxylic acid-4'- carboxylate)ruthenium(II) N719. Moreover, a dramatic color change from pink to yellow was observed, which allowed simple monitoring of Hg²⁺ by either naked eyes or a simple colorimetric reader. Therefore, the proposed sensor can provide potential applications for Hg²⁺ detection.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

A highly selective turn-on colorimetric and luminescence sensor based on a triphenylamine-appended ruthenium(II) dye for detecting mercury ion

English

A highly selective turn-on colorimetric and luminescence sensor based on a triphenylamine-appended ruthenium(II) dye for detecting mercury ion

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

A highly selective turn-on colorimetric and luminescence sensor based on a triphenylamine-appended ruthenium(II) dye for detecting mercury ion

English

A highly selective turn-on colorimetric and luminescence sensor based on a triphenylamine-appended ruthenium(II) dye for detecting mercury ion

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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