X-ray and vibrational spectroscopic study on polymorphism of trielaidin

被引:19
作者
Dohi, K [1 ]
Kaneko, F [1 ]
Kawaguchi, T [1 ]
机构
[1] Osaka Univ, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan
关键词
biomaterials; crystal structure; glycerides; lipids; organic compounds;
D O I
10.1016/S0022-0248(01)02281-3
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
Polymorphism of trielaidin C3H5(OCOC17H33)(3), which is a typical monoacid trans-unsaturated TAG, has been studied with X-ray diffraction and vibrational (IR and Raman) spectroscopy. It is clarified that the beta phase changes the conformation around trans-C = C bond depending on its crystallization conditions. As for the internal rotation angle of C-C bonds next to trans-C = C bond, the beta phase grown from a hexane solution shows a significant deviation from the standard skew or skew' conformation, which was found in the beta phase grown from a methanol-chloroform-toluene mixed solution. Contrary to the ordered molecular structure of the beta phase, the alpha phase grown from a melt at high supercooling has a disordered structure at the glycerol backbone. The polymethylene chain between trans-C = C bond and ester linkage is also conformationally disordered in the alpha phase. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:2227 / 2232
页数:6
相关论文
共 18 条
[1]   INFRARED SPECTROSCOPY OF LIPIDS [J].
CHAPMAN, D .
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY, 1965, 42 (05) :353-+
[2]   Molecular analysis of the β-polymorphic form of trielaidin:: crystal structure at low temperature [J].
Culot, C ;
Norberg, B ;
Evrard, G ;
Durant, F .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 2000, 56 :317-321
[3]  
Hagemann JW, 1988, CRYSTALLIZATION POLY
[4]   REFINEMENT OF STRUCTURE OF BETA-TRICAPRIN [J].
JENSEN, LH ;
MABIS, AJ .
ACTA CRYSTALLOGRAPHICA, 1966, 21 :770-&
[5]   Mechanism of the gamma->alpha and gamma 1->alpha 1 reversible solid-state phase transitions of erucic acid [J].
Kaneko, F ;
Yamazaki, K ;
Kobayashi, M ;
Kitagawa, Y ;
Matsuura, Y ;
Sato, K ;
Suzuki, M .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (21) :9138-9148
[6]  
KATO K, 1996, ADV APPL LIPID RES, V2, P213
[7]  
KELLENS M, 1990, CHEM PHYS LIPIDS, V52, P1197
[8]   VIBRATIONAL SPECTROSCOPIC STUDY ON POLYMORPHISM AND ORDER-DISORDER PHASE-TRANSITION IN OLEIC-ACID [J].
KOBAYASHI, M ;
KANEKO, F ;
SATO, K ;
SUZUKI, M .
JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (23) :6371-6378
[9]  
Kobayashi M., 1988, CRYSTALLIZATION POLY, P139
[10]  
LARSSON K, 1964, ARK KEMI, V23, P1