A tunable pH-sensing system based on Ag nanoclusters capped by hyperbranched polyethyleneimine with different molecular weights

doi:10.1016/j.talanta.2015.09.023

NWIPB OpenIR

	A tunable pH-sensing system based on Ag nanoclusters capped by hyperbranched polyethyleneimine with different molecular weights
	Qu, Fei 1,2; Zou, Xuan 1,2; Kong, Rongmei 1,2; You, Jinmao 1,2,3
	2016
发表期刊	TALANTA
卷号	146 页码:549-555
文章类型	Article
摘要	In this assay, a tunable pH sensing system was developed based on Ag nanoclusters (Ag NCs) capped by hyperbranched polyethyleneimine (PEI) with different molecular weights (abbreviated as Ag NC-PEIs). For instance, when the molecular weight of PEI was 600 or 1800, the fluorescence intensities of Ag NCs exhibited a linear fashion over the pH range 4.10-7.96; when the molecular weight of PEI was 25,000, the pH linear range was from 4.78 to 7.96; when the molecular weight of PEI was 70,000, the pH linear range was 6.09-8.95. According to the molecular weight of PEI 600/1800, 25,000, and 70,000, the color change point was pH 4.10-4.78, 533-6.09, and 6.09-6.80, respectively. Therefore, Ag NC-PEI 600 and 1800 were proper to acid conditions; Ag NC-PEI 25,000 was sensitive to weak acid media; while Ag NC-PEI 70,000 was adapted to neutral solution. The tunable and selective color change points brought an excellent feature of Ag NC-PEIs as visual pH indicators, which was flexible and applicable to a variety of environments. Besides, the ratios of absorbance at 415 nm and 268 nm of Ag NCs also showed linear relationships with pH variations. Therefore, there were three ways of this system for sensing pH values, including fluorescence assay, ultraviolet-visible measurement, and visual detection, suggesting that this tunable pH-sensing platform was more feasible, reliable, and accurate. (C) 2015 Elsevier B.V. All rights reserved.
关键词	Ag Nanoclusters Polyethyleneimine Ph Sensing System Tunability Ph Indicator
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1016/j.talanta.2015.09.023
关键词[WOS]	SILVER NANOCLUSTERS ; SENSITIVE DETECTION ; FLUORESCENCE PROBE ; SENSOR ; NANOPARTICLES ; IONS
收录类别	SCI
语种	英语
项目资助者	National Natural Science Foundation of China (Youth Fund Project)(21405093) ; Excellent Middle-age and Young Scientists Research Award Foundation of Shandong Province(BS2013SW012) ; Scientific Research Foundation of Qufu Normal University(BSQD20130117)
WOS研究方向	Chemistry
WOS类目	Chemistry, Analytical
WOS记录号	WOS:000363815600078
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/6525
专题	中国科学院西北高原生物研究所
作者单位	1.Qufu Normal Univ, Key Lab Life Organ Anal, Qufu 273165, Shandong, Peoples R China 2.Qufu Normal Univ, Key Lab Pharmaceut Intermediates & Anal Nat Med, Qufu 273165, Shandong, Peoples R China 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810001, Peoples R China
推荐引用方式 GB/T 7714	Qu, Fei,Zou, Xuan,Kong, Rongmei,et al. A tunable pH-sensing system based on Ag nanoclusters capped by hyperbranched polyethyleneimine with different molecular weights[J]. TALANTA,2016,146:549-555.
APA	Qu, Fei,Zou, Xuan,Kong, Rongmei,&You, Jinmao.(2016).A tunable pH-sensing system based on Ag nanoclusters capped by hyperbranched polyethyleneimine with different molecular weights.TALANTA,146,549-555.
MLA	Qu, Fei,et al."A tunable pH-sensing system based on Ag nanoclusters capped by hyperbranched polyethyleneimine with different molecular weights".TALANTA 146(2016):549-555.