In situ ATR-IR observation of nucleation and crystal growth of KH2PO4 in aqueous solution

	In situ ATR-IR observation of nucleation and crystal growth of KH2PO4 in aqueous solution
	Sun CT ; Xue DF
刊名	crystengcomm
	2013
卷号	15 期号:48 页码:10445-10450
关键词	KDP ADP MORPHOLOGY MECHANISM HYDRATION MODES WATER RAMAN
ISSN号	1466-8033
通讯作者	sun ct
中文摘要	in situ attenuated total reflectance-infrared (atr-ir) spectroscopy was used to record and characterize the nucleation and crystal growth of kh2po4 (kdp) from aqueous solution with ph = 1.01-6.96. in the crystallization of kdp, k+ and h2po4- ions transform from hydrated ions to clusters and crystalline state. with increasing measurement time, the shift of v(3)(po4) at 938 and 1145 cm(-1) towards lower wavenumbers illustrated the breaking of hydrogen bonding between h2po4- and h2o. ir bands of v(o-h) at 2370 cm(-1) and beta(o-h) at 1274 cm(-1) indicated the formation of h2po4- clusters possessing kdp lattice structural characteristics via hydrogen bonding. the disappearance of v(3)(po4) at 1145 cm(-1) indicated the chemical bonding between k+ and h2po4- in the nucleation stage of kdp. in kdp supersaturated solution with ph = 2.02-6.96, h2po4- groups with larger hydrated ionic radius initially form a framework structure, and then k+ ions with a relatively smaller hydrated ionic radius insert into the h2po4- framework to form kdp. moreover, the time needed for the appearance of kdp solids in ir measurement can be modified by varying the ph value of kdp supersaturated solution. such an in situ visualization strategy can characterize the structural variations by spectroscopy, which deepens the insight into the nucleation and crystal growth from aqueous solution during the whole crystallization process.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000327446500007
公开日期	2014-04-16
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/50119]
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	Sun CT,Xue DF. In situ ATR-IR observation of nucleation and crystal growth of KH2PO4 in aqueous solution[J]. crystengcomm,2013,15(48):10445-10450.
APA	Sun CT,&Xue DF.(2013).In situ ATR-IR observation of nucleation and crystal growth of KH2PO4 in aqueous solution.crystengcomm,15(48),10445-10450.
MLA	Sun CT,et al."In situ ATR-IR observation of nucleation and crystal growth of KH2PO4 in aqueous solution".crystengcomm 15.48(2013):10445-10450.