Synthesis and liquid-crystalline behaviour of tetrakis- and octakis(13,17-dioxa nonacosane-15-sulfanyl)phthalocyanines

被引:46
作者
Gürek, AG
Ahsen, V
Heinemann, F
Zugenmaier, P
机构
[1] TUBITAK, Marmara Res Ctr, Dept Chem, TR-41470 Gebze Kocaeli, Turkey
[2] Gebze Inst Technol, Dept Chem, TR-41400 Kocaeli, Turkey
[3] Tech Univ Clausthal, Inst Phys Chem, D-38678 Clausthal Zellerfeld, Germany
来源
MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2000年 / 338卷 / 338期
关键词
phthalocyanine; liquid crystal; metallo mesogen;
D O I
10.1080/10587250008024421
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Tetra- and octa(13, 17-dioxa nonacosane-15-sulfanyl) substituted metal free- and Ni(ll) phthalocyanines have been synthesized from the corresponding phthalonitrile derivatives in the presence the anhydrous metal salt(NiCl2) or a strong organic base. The new compounds have been characterised by elemental analyses, IR, NMR and electronic spectroscopy and mass spectra. The mesogenic properties of these new materials were studied by differential scanning calorimetry(DSC), optical microscopy and X-ray investigations. All compounds show a discotic mesophase in an extremely large temperature interval including room temperature. X-ray diffraction patterns of the mesophases confirm that tetra-substituted compounds(5a, 5b) form a hexagonal ordered columnar mesophases(D-ho), whereas octa-substituted compounds(7a, 7b) lend to centered rectangular disordered columnar mesophases(D-rd).
引用
收藏
页码:75 / +
页数:25
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