Comparative Study of Nucleation by Different Alcoholic Solutions of Benzoin, and Benzoin Dust |
| |
| Authors: | Sahana Paul A Hazra U K De S Bhar K Goswami |
| |
| Institution: | (1) Environmental Science Programme, Faculty of Science, Jadavpur University, Kolkata, India;(2) Chemistry Department, Jadavpur University, Kolkata, India;(3) Department of Physics, Jadavpur University, Kolkata, India |
| |
| Abstract: | Nucleation properties of different alcoholic solutions of Benzoin and Benzoin dust have been studied by varying the seeding temperature in a laboratory Cold Chamber. In the present study, three different alcoholic solutions are being used and these are due to the standard Ethyl alcohol, one higher alcohol i.e. Isopropyle alcohol and one lower alcohol i.e. Methyl alcohol. In addition, Benzil dust and droplets of Acetone and Chloroform have been used to examine if these agents have any ice nucleation ability. It has been observed that all alcoholic solutions of Benzoin have sufficient ice nucleation ability at the negative side of 0°C, with the maximum concentration occurring at −14.4°C. In case of Benzoin dust, the nucleation ability is better on the positive side of 0°C than the negative side. On the other hand, Benzil dust has insignificant nucleation ability and the droplets of two other agents have no nucleation ability at all.Considering the chemical as well as crystalline structure, one can conclude that the presence of OH group in the seeding molecule plays the central role in ice nucleation/hydrate crystal formation. In fact, a number of supplementary experiments like crystal growth in an incubator, XRD analysis and NMR study are performed to identify the nature of crystals formed by Benzoin dust above 0°C. One can conclude that these are hydrate crystals of Benzoin with water caging around Benzoin crystals. |
| |
| Keywords: | formvar hydrate crystal nuclear magnetic resonance whisker axis x-ray diffraction |
| 本文献已被 SpringerLink 等数据库收录！ |
|
