A New Polymer-Based Fluorescent Chemosensor Incorporating Propane-1,3-Dione and 2,5-Diethynylbenzene Moieties for Detection of Copper(II) and Iron(III)

Dongliang Yang; Chunhui Dai; Yanling Hu; Shuli Liu; Lixing Weng; Zhimin Luo; Yixiang Cheng; Lianhui Wang

doi:10.3390/polym9070267

A New Polymer-Based Fluorescent Chemosensor Incorporating Propane-1,3-Dione and 2,5-Diethynylbenzene Moieties for Detection of Copper(II) and Iron(III)

Polymers (Basel). 2017 Jul 6;9(7):267. doi: 10.3390/polym9070267.

Authors

Dongliang Yang¹, Chunhui Dai², Yanling Hu³, Shuli Liu⁴, Lixing Weng⁵, Zhimin Luo⁶, Yixiang Cheng⁷, Lianhui Wang⁸

Affiliations

¹ Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210046, China. 1011071735@njupt.edu.cn.
² Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China. daichunhui@163.com.
³ Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210046, China. huyanling124@hotmail.com.
⁴ Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210046, China. liushuli_1990@126.com.
⁵ College of Geography and Biological Information, Nanjing University of Posts and Telecommunications, Nanjing 210046, China. lxweng@njupt.edu.cn.
⁶ Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210046, China. iamzmluo@njupt.edu.cn.
⁷ Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China. yxcheng@nju.edu.cn.
⁸ Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210046, China. iamlhwang@njupt.edu.cn.

Abstract

A novel conjugated polymer (PDBDBM) was developed by the polymerization of 1,4-dioctyloxy-2,5-diethynylbenzene with 1,3-bis(4-bromophenyl)propane-1,3-dione based on Pd-catalyzed Sonogashira-coupling reaction. The obtained polymer PDBDBM exhibited bright green photoluminescence under UV irradiation. According to the metal ion titration experiments, PDBDBM showed high sensitivity and selectivity for detection of Cu²⁺ and Fe³⁺ over other metal ions. The fluorescent detection limits of PDBDBM were calculated to be 5 nM for Cu²⁺ and 0.4 μM for Fe³⁺ and the Stern⁻Volmer quenching constant for Cu²⁺ and Fe³⁺ were found to be 1.28 × 10⁸ M^-1 and 2.40 × 10⁴ M^-1, respectively. These results indicated that the polymer can be used as a potential probe for Cu²⁺ and Fe³⁺ detection.

Keywords: conjugated polymers; copper(II); ion detection; iron(III); sensor.

Abstract

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