A Ca2+ controlled thioether linked bichromophoric squaraine foldamer for "turn on" fluorescent sensing of oxalate - Details

author：

Wang, G. (Wang, G..) ^[1] | Zhu, H. (Zhu, H..) ^[2] | Lin, Y. (Lin, Y..) ^[3] | Chen, Y. (Chen, Y..) ^[4] | Fu, N. (Fu, N..) ^[5]

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Abstract：

Several　thioether　linked　bichromophoric　squaraines　1　were　prepared　and　characterized.　Among　these,　the　bichromophore　1c,　containing　three　sulfur　atoms,　was　found　to　selectively　bind　with　Ca2+　and　lead　to　a　folded　conformation.　The　selective　binding　of　Ca2+　resulted　in　an　absorption　blue　shift　and　fluorescence　quenching　due　to　the　cation-induced　folding　of　the　bichromophore　and　the　resultant　exciton　coupling　between　the　squaraine　chromophores.　Job＇s　plot　confirmed　a　1:1　binding　between　1c　and　Ca2+.　Anions　such　as　oxalate　can　extract　Ca2+　from　squaraine　foldamers　via　the　formation　of　insoluble　salts　and　restore　the　fluorescent　signal.　This　sensing　approach　can　be　applied　to　the　＂turn　on＂　fluorescent　detection　of　oxalate　with　a　low　detection　limit　of　5.2　nM　(3σ/k).　©　2014　Elsevier　B.V.　All　rights　reserved.

Keyword：

Calcium; Exciton coupling; Fluorescent probe; Oxalate; Squaraine foldamer

Community：

[ 1 ] [Wang, G.]Key Laboratory of Analysis and Detection for Food Safety, Ministry of Education, Fuzhou University, Fuzhou, Fujian 350108, China
[ 2 ] [Wang, G.]Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
[ 3 ] [Wang, G.]State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China
[ 4 ] [Zhu, H.]Key Laboratory of Analysis and Detection for Food Safety, Ministry of Education, Fuzhou University, Fuzhou, Fujian 350108, China
[ 5 ] [Zhu, H.]Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
[ 6 ] [Zhu, H.]State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China
[ 7 ] [Lin, Y.]Key Laboratory of Analysis and Detection for Food Safety, Ministry of Education, Fuzhou University, Fuzhou, Fujian 350108, China
[ 8 ] [Lin, Y.]Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
[ 9 ] [Lin, Y.]State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China
[ 10 ] [Chen, Y.]Key Laboratory of Analysis and Detection for Food Safety, Ministry of Education, Fuzhou University, Fuzhou, Fujian 350108, China
[ 11 ] [Chen, Y.]Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
[ 12 ] [Chen, Y.]State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China
[ 13 ] [Fu, N.]Key Laboratory of Analysis and Detection for Food Safety, Ministry of Education, Fuzhou University, Fuzhou, Fujian 350108, China
[ 14 ] [Fu, N.]Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
[ 15 ] [Fu, N.]State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China

Reprint 's Address：

[Fu, N.]Department of Chemistry, Fuzhou UniversityChina

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Source ：

Sensors and Actuators, B: Chemical

ISSN： 0925-4005

Year： 2015

Volume： 206

Page： 624-629

4 . 7 5 8

JCR@2015

6 . 3 9 3

JCR@2018

JCR Journal Grade：1

Cited Count：

WoS CC Cited Count： 0

SCOPUS Cited Count： 11

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 2

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