IR Spectral Study of Mesoscale Process during Urea Crystallization from Aqueous Solution
文献类型：期刊论文
| 作者 | Sun,Congting; Xue,Dongfeng |
| 刊名 | crystal growth & design
 |
| 出版日期 | 2015 |
| 卷号 | 15期号:6页码:2867-2873 |
| 关键词 | CRYSTAL-GROWTH NUCLEATION MORPHOLOGY CLUSTERS TRANSFORMATION DISSOLUTION SIMULATION SCATTERING PHASE |
| 通讯作者 | xue,df |
| 英文摘要 | unravelling the mesoscale process and the dynamic heterogeneous structures that appear nil the mesoscale in a crystallization system is important in designing and fabricating functional crystalline materials. recent experimental observations show the existence of stable dusters and amorphous intermediates before the formation of a crystalline solid, which seems to contradict classical nucleation theory. here we show by in situ infrared spectroscopy and theoretical calculation that the liquid/solid phase transformation of urea proceeds through the agglomeration of primary clusters. the phase transformation pathway of urea in solution has been identified; in which urea molecules initially aggregate into one-dimensional (1d) molecular chains, and then these 1d molecular chains assemble to 2d plane-like and 3d net-like clusters. crystalline urea with p-42(1)m symmetry can be formed when these 3d net-like clusters overcome a critical size. both experimental and. calculated results demonstrate that the liquid/solid. phase transformation of urea in aqueous solution obeys the classical nucleation theory. finally, a morphology diagram of urea is provided on the basis of relative chemical bonding energy density. this morphology diagram can be used to understand the multiple anisotropic geometries, for how urea crystals in an aqueous solution system can be laid out. our results demonstrate the concept of identifying a particular mesoscale process in a urea crystallization system by both in situ vibration spectroscopy observations and chemical bonding calculations. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000355890400042 |
| 公开日期 | 2016-05-31 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/65054]  |
| 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,Congting,Xue,Dongfeng. IR Spectral Study of Mesoscale Process during Urea Crystallization from Aqueous Solution[J]. crystal growth & design,2015,15(6):2867-2873. |
| APA | Sun,Congting,&Xue,Dongfeng.(2015).IR Spectral Study of Mesoscale Process during Urea Crystallization from Aqueous Solution.crystal growth & design,15(6),2867-2873. |
| MLA | Sun,Congting,et al."IR Spectral Study of Mesoscale Process during Urea Crystallization from Aqueous Solution".crystal growth & design 15.6(2015):2867-2873. |
入库方式： OAI收割
来源：长春应用化学研究所
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