Magnetic properties of all-organic liquid crystals containing a chiral five-membered cyclic nitroxide unit within the rigid core

被引:80
作者
Ikuma, N
Tamura, R [1 ]
Shimono, S
Kawame, N
Tamada, O
Sakai, N
Yamauchi, J
Yamamoto, Y
机构
[1] Kyoto Univ, Grad Sch Global Environm Studies, Kyoto 6068501, Japan
[2] Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan
[3] Kyoto Univ, Grad Sch Sci, Kyoto 6068501, Japan
关键词
chirality; EPR spectroscopy; liquid crystals; magnetic properties; phase transitions;
D O I
10.1002/anie.200460007
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Lining them up: Purely organic paramagnetic liquid crystals (see picture) showing thermally stable nematic or cholesteric phases were successfully prepared. The molecular orientation of the bulk liquid crystals induced by weak magnetic fields was confirmed by magnetic susceptibility measurements and EPR spectroscopy.
引用
收藏
页码:3677 / 3682
页数:6
相关论文
共 31 条
[1]   SYNTHESIS AND MAGNETIC-PROPERTIES OF MESOGENIC SIDE-CHAIN POLYMERS CONTAINING STABLE RADICALS [J].
ALLGAIER, J ;
FINKELMANN, H .
MACROMOLECULAR CHEMISTRY AND PHYSICS, 1994, 195 (03) :1017-1030
[2]   Rare-earth-containing magnetic liquid crystals [J].
Binnemans, K ;
Galyametdinov, YG ;
Van Deun, R ;
Bruce, DW ;
Collinson, SR ;
Polishchuk, AP ;
Bikchantaev, I ;
Haase, W ;
Prosvirin, AV ;
Tinchurina, L ;
Litvinov, I ;
Gubajdullin, A ;
Rakhmatullin, A ;
Uytterhoeven, K ;
Van Meervelt, L .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2000, 122 (18) :4335-4344
[3]  
Demus D., 1998, HDB LIQUID CRYSTALS, V1
[4]  
DIERKING I, TEXTURE LIQUID CRYST
[5]   SMECTIC E, C AND A FREE-RADICALS [J].
DVOLAITZKY, M ;
BILLARD, J ;
POLDY, F .
TETRAHEDRON, 1976, 32 (14) :1835-1838
[6]  
DVOLAITZKY M, 1974, CR ACAD SCI C CHIM, V279, P533
[7]   Alternate self-regeneration of stereocenters:: Enantioselective generation of a C2-symmetric chiral nitroxide and its reduction to the corresponding, highly sterically hindered amine [J].
Einhorn, J ;
Einhorn, C ;
Ratajczak, F ;
Gautier-Luneau, I ;
Pierre, JL .
JOURNAL OF ORGANIC CHEMISTRY, 1997, 62 (26) :9385-9387
[8]  
ENFAREMO N, 1996, LIEBIGS ANN, P1413
[9]   Synthesis and magnetic investigations on rare-earth-containing liquid crystals with large magnetic anisotropy [J].
Galyametdinov, Y ;
Athanassopoulou, MA ;
Griesar, K ;
Kharitonova, O ;
Bustamante, EAS ;
Tinchurina, L ;
Ovchinnikov, I ;
Haase, W .
CHEMISTRY OF MATERIALS, 1996, 8 (04) :922-926
[10]  
Griesar K, 1999, MAGNETIC PROPERTIES OF ORGANIC MATERIALS, P325