Meta-linked and para-linked water-soluble poly(arylene ethynylene)s with amino acid side chains: Effects of different linkage on Hg2+ ion sensing properties in aqueous media

	Meta-linked and para-linked water-soluble poly(arylene ethynylene)s with amino acid side chains: Effects of different linkage on Hg2+ ion sensing properties in aqueous media
	Wu XF ; Xu BW ; Tong H ; Wang LX
刊名	journal of polymer science part a-polymer chemistry
	2012
卷号	50 期号:8 页码:1521-1529
关键词	FLUORESCENT-CONJUGATED POLYMER HIGHLY SENSITIVE DETECTION RESONANCE ENERGY-TRANSFER OPTICAL-DETECTION MERCURY IONS CHEMICAL SENSORS LABEL-FREE FUNCTIONALIZED POLYFLUORENE CONFORMATIONAL-CHANGES PHENYLENE-ETHYNYLENE
ISSN号	0887-624x
通讯作者	tong h
中文摘要	water-soluble, meta- and para-linked poly(arylene ethynylene)s containing l-aspartic acid-functionalized fluorene units (p1 and p2) and their model compounds (m1 and m2) have been synthesized, and their photophysical properties and fluorescent sensing properties were investigated in aqueous solution. p1 and m1 with the meta-linkage show blue-shifted absorption and emission spectra, and decreased photoluminescence quantum yields compared with those of p2 and m2 with para-linkage. their absorption and fluorescence spectra are ph dependent perhaps due to the aggregation of the polymer chains at low ph values. in buffer solutions, both polymers and their model compounds exhibit the excellent selectivity and sensitivity to hg2+ over other common metal ions. furthermore, the quenching constant and detection limit of p1 are determined to be 1.04 x 10(7) m-1 and 10 nm, and show the higher sensitivity compared to p2. further comparison of their model compounds reveal that the sensitivity and quenching efficiency of m1 is also higher than that of m2, indicating that the meta-linkage pattern plays a key role in improving their hg2+ ion sensing properties. in addition, both meta- and para-linked polymers exhibit the higher quenching efficiency than their model compounds due to the amplified fluorescence response of conjugated polymer. (c) 2012 wiley periodicals, inc. j polym sci part a: polym chem, 2012
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000301229400009
公开日期	2013-05-22
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/48225]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Wu XF,Xu BW,Tong H,et al. Meta-linked and para-linked water-soluble poly(arylene ethynylene)s with amino acid side chains: Effects of different linkage on Hg2+ ion sensing properties in aqueous media[J]. journal of polymer science part a-polymer chemistry,2012,50(8):1521-1529.
APA	Wu XF,Xu BW,Tong H,&Wang LX.(2012).Meta-linked and para-linked water-soluble poly(arylene ethynylene)s with amino acid side chains: Effects of different linkage on Hg2+ ion sensing properties in aqueous media.journal of polymer science part a-polymer chemistry,50(8),1521-1529.
MLA	Wu XF,et al."Meta-linked and para-linked water-soluble poly(arylene ethynylene)s with amino acid side chains: Effects of different linkage on Hg2+ ion sensing properties in aqueous media".journal of polymer science part a-polymer chemistry 50.8(2012):1521-1529.