Direct Crystallization of Amorphous Molecular Systems Prepared by Vacuum Deposition:X-ray Studies of Phenyl Halides

Hideyuki Nakayama; Shin-ichi Ohta; Iji Onozuka

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Direct Crystallization of Amorphous Molecular Systems Prepared by Vacuum Deposition:X-ray Studies of Phenyl Halides

机译：真空沉积制备的非晶态分子体系的直接结晶：苯基卤化物的X射线研究

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Many amorphous molecular systems prepared by vacuum deposition onto cold substrates turn into crystals directly without exhibiting glass transition when their temperature is raised.To study the mechanism of the crystallization from amorphous states,we monitored the increase of X-ray Bragg peaks at constant temperatures for fluoro-,chloro-,and bro-mobenzene samples.Data were analyzed by using the Johnson-Mehl-Avrami equation.It was found that the crystallization from amorphous states of these compounds progresses through the nucleation and crystal-growth processes similar to those observed for fused materials.However,slightly complicated behaviors were observed for molecules with larger sub-stituents.These are considered to arise from the wide distribution of molecular arrangements that are stochastically generated in samples by the vapor deposition at low temperatures.

机译：通过真空沉积到冷基板上制备的许多非晶态分子系统，当温度升高时，它们直接转变为晶体而不会出现玻璃化转变。为了研究非晶态结晶的机理，我们监测了恒定温度下X射线布拉格峰的增加。使用Johnson-Mehl-Avrami方程分析数据，发现这些化合物从无定形状态的结晶过程通过类似于观察到的成核和晶体生长过程进行然而，对于较大取代基的分子，观察到的行为略有复杂。这被认为是由于低温汽相沉积随机地在样品中产生的分子排列的广泛分布引起的。

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《Bulletin of the Chemical Society of Japan》 |2004年第6期|共8页
作者
Hideyuki Nakayama; Shin-ichi Ohta; Iji Onozuka;
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1. Direct Crystallization of Amorphous Molecular Systems Prepared by Vacuum Deposition:X-ray Studies of Phenyl Halides [J] . Hideyuki Nakayama, Shin-ichi Ohta, Iji Onozuka Bulletin of the Chemical Society of Japan . 2004,第6期

机译：真空沉积制备的非晶态分子体系的直接结晶：苯基卤化物的X射线研究
2. Marked Difference in the Reaction Rate of an Azobenzene-based Photochromic Amorphous Molecular Material between Films Prepared by Vacuum Deposition and Spin Coating [J] . Takahiro Tanino, Hideyuki Nakano, Yasuhiko Shirota Chemistry Letters . 2006,第10期

机译：真空沉积与旋涂制备的薄膜之间偶氮苯基光致变色非晶态分子材料反应速率的明显差异
3. X-ray absorption fine structure study of amorphous metal oxide thin films prepared by photochemical metalorganic deposition [J] . Trudel S., Daryl Crozier E., Gordon R.A., Journal of Solid State Chemistry . 2011,第5期

机译：光化学金属有机沉积法制备非晶态金属氧化物薄膜的X射线吸收精细结构研究
4. Synthesis and X-ray Structural Study on the Complexes of Silver(I) Halide with Tricyclohexylephosphine, Diphenyl-(2,4,6-trimethoxy)phenylphosphine, Phenyl-2,4,6-trimethoxyphenyl phosphine, and Tris(2,4,6-trimethoxy)phenylphosphine [C] . Effendya, A. H. White International Conference on Neutron and X-Ray Scattering . 2008

机译：用三环己磷，二苯基 - （2,4,4,4,6-三甲氧基）苯基膦，苯基-2,4,6-三甲氧基苯基膦，以及三（2,4，）银（I）卤化物的合成和X射线结构研究6-三甲氧基）苯基膦
5. Investigating Crystallization tendency, Miscibility and Molecular interactions of drug-polymer systems for the development of amorphous solid dispersions. [D] . Meng, Fan. 2015

机译：研究用于形成无定形固体分散体的药物-聚合物体系的结晶趋势，互溶性和分子相互作用。
6. Tribological and thermal stability study of nanoporous amorphous boron carbide films prepared by pulsed plasma chemical vapor deposition [O] . Shahira Liza, Naoto Ohtake, Hiroki Akasaka, 2015

机译：脉冲等离子体化学气相沉积法制备纳米多孔非晶碳化硼薄膜的摩擦学和热稳定性研究
7. Tin doping effect on crystallization of amorphous silicon obtained by vapor deposition in vacuum [O] . Neimash V.B., Poroshin V.M., Shepeliavyi P.Ye., 2013

机译：锡掺杂对真空气相沉积获得的非晶硅结晶的影响
8. Glancing angle x-ray study of crystallization of amorphous Ge at the Ge-Al interface. [R] . S. M. Heald J. K. D. Jayanetti R. C. Budhani 1990

机译：在Ge-al界面处结晶非晶Ge的掠射角x射线研究。

Direct Crystallization of Amorphous Molecular Systems Prepared by Vacuum Deposition:X-ray Studies of Phenyl Halides

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