软X射线分光晶体马来酸氢十六酯  

Soft X ray Analyzer Crystal Hexadecly Hydrogen Maleate (HHM)

作　　者：潘建国[1,2] 关铁堂[1,2] 

机构地区：[1]中国科学院福建物质结构研究所 [2]福州大学化学系

出　　处：《人工晶体学报》1999年第2期164-167,共4页Journal of Synthetic Crystals

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.

关 键 词：X射线分光晶体 马来酸氢十六酯 有机晶体 

分 类 号：O782.1[理学—晶体学] O743.5