Polycrystalline growth in precipitation of an aromatic amine derivative and l-glutamic acid

被引:22
作者
Beck, Ralf [1 ]
Malthe-Sorenssen, Didrik [1 ]
Andreassen, Jens-Petter [1 ]
机构
[1] Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway
关键词
Crystal morphology; Supersaturation; Polycrystalline; Spherulite; Aromatic compounds; l-glutamic acid crystallization; POLYMORPHIC TRANSFORMATION; CRYSTALLIZATION; MECHANISM;
D O I
10.1016/j.jcrysgro.2008.11.029
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
The effect of initial supersaturation and temperature on the particle morphology of I-glutamic acid and an aromatic amine derivative has been compared in batch experiments by pH-shift precipitation in water at temperatures of 5-80 degrees C. At higher initial supersaturation ratios both systems give rise to polycrystalline particles, which have been identified to grow by a spherulitic growth mechanism. On the other hand, single crystals can be obtained at low values for the initial supersaturation. The aqueous aromatic amine system yields plate-like crystals, whereas the beta-polymorph of l-glutamic acid crystallizes as needle-like particles at low initial supersaturation. While the monocrystalline plate-like particles are precipitated directly from solution in case of the aromatic amine, monocrystalline needles of beta-l-glutamic acid could only be crystallized by transforming the initially precipitated metastable alpha-polymorph. The onset of polycrystalline growth can be observed at intermediate initial supersaturation in crystallization of both the aromatic amine and beta-l-glutamic acid. The aromatic amine derivative shows switching from monocrystalline plate-like crystals at a constant initial supersaturation value, whereas beta-l-glutamic acid displays a transition from needles to spherulites, at a supersaturation level that becomes lower as the temperature increases. This switch in growth mechanism could not be found for the a-polymorph of l-glutamic acid. The spherulite morphology becomes more compact at higher initial supersaturation ratios. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:320 / 326
页数:7
相关论文
共 17 条
[1]   Growth and aggregation of vaterite in seeded-batch experiments [J].
Andreassen, JP ;
Hounslow, MJ .
AICHE JOURNAL, 2004, 50 (11) :2772-2782
[2]  
Busch S, 1999, EUR J INORG CHEM, P1643
[3]   Crystal design of calcium carbonate microparticles using double-hydrophilic block copolymers [J].
Colfen, H ;
Antonietti, M .
LANGMUIR, 1998, 14 (03) :582-589
[4]   Growth and form of spherulites -: art. no. 011605 [J].
Gránásy, L ;
Pusztai, T ;
Tegze, G ;
Warren, JA ;
Douglas, JF .
PHYSICAL REVIEW E, 2005, 72 (01)
[5]  
HURTLE DTJ, 1994, SPHERULITIC CRYSTALL, P1180
[6]   Morphology and internal structure of barium sulfate - derivation of a new growth mechanism [J].
Judat, B ;
Kind, M .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2004, 269 (02) :341-353
[7]   A PHENOMENOLOGICAL THEORY OF SPHERULITIC CRYSTALLIZATION [J].
KEITH, HD ;
PADDEN, FJ .
JOURNAL OF APPLIED PHYSICS, 1963, 34 (08) :2409-&
[8]   POLYMORPHISM IN THE CRYSTALLIZATION OF L-GLUTAMIC ACID [J].
KITAMURA, M .
JOURNAL OF CRYSTAL GROWTH, 1989, 96 (03) :541-546
[9]   Review spherulites: A personal perspective [J].
Magill, JH .
JOURNAL OF MATERIALS SCIENCE, 2001, 36 (13) :3143-3164
[10]   PREPARATION AND PROPERTIES OF UNIFORM SIZE COLLOIDS [J].
MATIJEVIC, E .
CHEMISTRY OF MATERIALS, 1993, 5 (04) :412-426