摘要
马来酸氢十六酯（ＨＨＭ）是一种长碳链酯晶体，晶面间距２ｄ＝５．８５ｎｍ，对软Ｘ射线有很好的衍射性能。它在苯和甲苯溶剂中表现很好的结晶性，增大溶剂的极性时明显地不利于ＨＨＭ的结晶。以甲苯为溶剂，采用溶液降温法生长ＨＨＭ单晶，控制晶体生长温度为３２℃，降温速度为０．０２℃／ｄ，籽晶转速为６ｒ／ｍｉｎ，经过约２周的生长时间，可以生长出３０ｍｍ×１６ｍｍ×１ｍｍ的透明单晶体。ＨＨＭ分子极易形成双分子缔合体，缔合体上由２个羧基组成的局域平面有利于分子的有序排列。
Hexadecly hydrogen meleate(HHM) is an organic molecular crystal
with a long chain of carbon atoms.It has large interplanar spacing (2 d =5.85nm) and very high
diffraction intensity in irradiation of soft X rays. It shows a very good crystallization habit in
solvent of benzene and toluene.It is very clear that increased solvent polarity will not beneficial
to HHM's crystallization.The HHM single crystals were grown by the solution dropping
temperature method. The growing conditions are:growing temperature 32 ℃,dropping
temperature rate 0.02 ℃ /day and revolving seed crystal at a speed of six revolution per
minute. Over two weeks a crystal of dimensions 30 mm×16 mm×1 mm was obtained. HHM
moleculars tend to form dimers via intermolecular hydrogen bonding between carboxyl groups
and the atoms of the two carboxyl are arranged nearly in planes which favors orderly pack of
molecular.This is why HHM shows better crystallization than any other esters with long chain of
carbon atoms.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
1999年第2期164-167,共4页
Journal of Synthetic Crystals
关键词
X射线分光晶体
马来酸氢十六酯
有机晶体
X ray analyzing crystal,crystal growth from solution,hexadecly
hydrogen moleate (HHM),organic crystal
