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	聚乙烯吡咯烷酮与苯磺酸铕相互作用研究; On the Interaction between PVP and Europium Benzenesulfonate
	刘俊 ; 刘少轩 ; 高云龙 ; 范晓坤 ; 关妍 ; 翁诗甫 ; 杨展澜 ; 徐怡庄 ; 吴瑾光
	2013
关键词	聚乙烯吡咯烷酮 苯磺酸铕 红外光谱 Polyvinylpyrrolidone Europium benzenesulfonate FTIR
英文摘要	用变温红外光谱法和荧光光谱法研究了聚乙烯吡咯烷酮与苯磺酸铕的相互作用.聚乙烯吡咯烷酮的酰胺基团可与苯磺酸铕中的铕离子发生络合配位作用,导致聚乙烯吡咯烷酮的酰胺Ⅰ带发生红移.这种络合配位作用,使原本不溶于氯仿的苯磺酸铕可溶于含聚乙烯吡咯烷酮的氯仿溶液.在苯磺酸铕固体的发射光谱中,只能观察到铕离子的f—f跃迁特征发射峰,而在苯磺酸铕浓水溶液的荧光光谱中,亦可观测到苯磺酸根的π*→π跃迁峰,说明苯磺酸铕在水溶液中存在解络合现象.苯磺酸铕在溶液中的解络合行为使铕离子周围的可配位空间增大,这为PVP的酰胺基团与铕离子发生络合配位作用创造了条件.; The interaction between polyvinylpyrrolidone (abbreviated as PVP) and europium benzenesulfonate was investigated by using temperature-dependent FTIR and fluorescence spectra. Europium compounds show strong coordination ability with amide groups of PVP. In order to remove the undesired H-O-H scissoring bands from the adsorbed water in FTIR spectra, temperature-dependent FTIR was utilized to reveal the spectral behavior of amide I band after being coordinated with europium ions from europium compounds. As a result, the bond order of the carbonyl groups decreased, leading to a red-shift of amide I band in the FTIR spectra. Furthermore, fluorescence spectra demonstrate that the interaction between PVP and europium benzenesulfonate enhanced the solubility of europium benzenesulfonate in chloroform. As a matter of fact, europium benzenesulfonate, which is insoluble in chloroform, becomes soluble in chloroform containing 10 Wt% PVP. In the fluorescence spectrum of europium benzenesulfonate crystals, only the f-f transition peaks of europium ions can be found. However, the emission peak of the pi*-pi transition of benzenesulfonate group appears in concentrated aqueous solution of europium benzenesulfonate. The phenomenon shows that part of benzenesulfonate undergoes decomplexation from europium benzenesulfonate complex and isolated benzenesulfonate occurs in the aqueous solution. Energy transfer pathway from excited triplet state of benzenesulfonate to europium ions is blocked in isolated benzenesulfonate. As a result, pi*-pi transition band of benzenesulfonate can be observed in the florescence spectrum. The decomplexation provides larger coordination space around europium ions, which favors the coordination between europium benzenesulfonate and PVP.; 国家自然科学基金项目; 国家科技部(863)重大项目; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000320012600010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); EI; 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 10; 6; 1487-1490; 33
语种	中文
出处	万方 ; SCI ; EI ; http://d.g.wanfangdata.com.cn/Periodical_gpxygpfx201306010.aspx
出版者	光谱学与光谱分析
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/79356]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	刘俊,刘少轩,高云龙,等. 聚乙烯吡咯烷酮与苯磺酸铕相互作用研究, On the Interaction between PVP and Europium Benzenesulfonate. 2013-01-01.

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