NMR法研究Na~+在二元混合溶剂中的溶剂化

doi:10.3866/PKU.WHXB19850201

CORC > 北京大学 > 化学与分子工程学院

	NMR法研究Na~+在二元混合溶剂中的溶剂化; A STUDY ON THE SOLVATION OF Na+ IN BINARY MIXTURE OF SOLVENTS BY Na+-23 NMR
	黄忆宁 ; 李芝芬 ; 刘瑞麟
刊名	物理化学学报
	1985
关键词	混合溶剂 NMR法溶剂化溶剂组成化学位移非质子溶剂实验数据二氧六环作图法 Na
DOI	10.3866/PKU.WHXB19850201
英文摘要	本工作应用NMR法测定了NaClO_4在水-丙酮,水-乙腈和水-乙醇以及NaBPh_4在甲醇-DMF,甲醇-苯及甲醇-二氧六环混合溶剂中~(23)Na~+的化学位移随溶剂组成变化的规律。实验数据列于表1和表2。用化学位移对溶剂组成作图法,可以得出一对溶剂的等溶剂化点。由此比较各种溶剂对Na~+离子的溶剂化能力。实验结果表明,丙酮、乙腈、乙醇的溶剂化能力远比水弱。极性非质子溶剂DMF的溶剂化能力强于甲醇。本文计算了甲醇-DMF和水-丙酮两对混合溶剂的优先溶剂化自由能。所得溶剂化能力的次序与等溶剂化点法结果一致。; Na-23(+) chemical shift of NaClO4, in mixed solvents of water-aceton, water-acetonitrile, and water-ethanol and of NaBPh4, in methanol-DMF, methanol-benzene, and methanol-dioxane were measured. By means of iso-solvation point the solvating abilities were compared as water>aceton >= acetonitrile >= ethanol and DMF>methanol. The preferential solvation free energies of Na+ for the pairs of solvents, methanol-DMF and water-acetan, were evaluated as -2.7kJ mol(-1) for DMF to methanol and 4.6kJ mol(-1) for aceton to water. Na-23(+) chemical shift in methanol-benzene benzene. to water. is independent of it verifies the simple solvation modle for ion the content of in methanol-inert solvent mixture. However the chemical shift of Na-23(+) in methanol-dioxane with the composition of solvent. mixture varies The linewidth of Na-23 resonance peak increases dramtically with the increasing of dioxane. It seems that the dioxane molecules disturb the primary solvation shell of Na+ in methanol and result a unsymmetrical immediate surrounding for Na+ cation.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000207567800001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 0; 02; 109-110; 1
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/83347]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	黄忆宁,李芝芬,刘瑞麟. NMR法研究Na~+在二元混合溶剂中的溶剂化, A STUDY ON THE SOLVATION OF Na+ IN BINARY MIXTURE OF SOLVENTS BY Na+-23 NMR[J]. 物理化学学报,1985.
APA	黄忆宁,李芝芬,&刘瑞麟.(1985).NMR法研究Na~+在二元混合溶剂中的溶剂化.物理化学学报.
MLA	黄忆宁,et al."NMR法研究Na~+在二元混合溶剂中的溶剂化".物理化学学报 (1985).