TY - JOUR
T1 - Synthesis and liquid crystal properties of phthalocyanine bearing a star polytetrahydrofuran moiety
AU - Gursel, Yeşim H.
AU - Senkal, B. Filiz
AU - Kandaz, Mehmet
AU - Yakuphanoglu, Fahrettin
PY - 2009/6/10
Y1 - 2009/6/10
N2 - A new polymeric ligand, 6-(3,4-dicyanophenylthio)-hexyl-2-polytetrahydrofuranacetate (2) and its liquid crystalline polymeric phthalocyanine, 2,9,16,23-tetrakis-{6-(polytetrahydrofuran-2-carboxylate)-hexylthio-phthalocyaninatocobalt(II) (3), {Co[Pc(S-C6H13OCO-poly-THF)4]}(CoPcLC) have been synthesized. The ligand and the phthalocyanine, bearing polytetrahydrofuran moieties (poly-THF), were characterized using elemental analysis, FTIR, 1H and 13C NMR, and UV-Vis techniques. CoPcLC (3) promotes a greater interaction between the mesogens, resulting in solution aggregations together with a red-shift in the Q-band in the presence of the soft Ag+ ion. The dielectric anisotropy and phase transition temperature values of CoPcLC doped with 4-cyano-4′-n-pentylbiphenyl (5CB) were found to be 7.17 and 40.5 °C, respectively. The dielectrical anisotropy behaviour of the liquid crystals changes from the positive to the negative type. The current-voltage characteristics of the liquid crystals show a non-linear behaviour.
AB - A new polymeric ligand, 6-(3,4-dicyanophenylthio)-hexyl-2-polytetrahydrofuranacetate (2) and its liquid crystalline polymeric phthalocyanine, 2,9,16,23-tetrakis-{6-(polytetrahydrofuran-2-carboxylate)-hexylthio-phthalocyaninatocobalt(II) (3), {Co[Pc(S-C6H13OCO-poly-THF)4]}(CoPcLC) have been synthesized. The ligand and the phthalocyanine, bearing polytetrahydrofuran moieties (poly-THF), were characterized using elemental analysis, FTIR, 1H and 13C NMR, and UV-Vis techniques. CoPcLC (3) promotes a greater interaction between the mesogens, resulting in solution aggregations together with a red-shift in the Q-band in the presence of the soft Ag+ ion. The dielectric anisotropy and phase transition temperature values of CoPcLC doped with 4-cyano-4′-n-pentylbiphenyl (5CB) were found to be 7.17 and 40.5 °C, respectively. The dielectrical anisotropy behaviour of the liquid crystals changes from the positive to the negative type. The current-voltage characteristics of the liquid crystals show a non-linear behaviour.
KW - Cationic
KW - Cobalt
KW - Liquid crystal
KW - Metal-ion sensing
KW - Phthalocyanine
KW - Polymerization
UR - http://www.scopus.com/inward/record.url?scp=65549088424&partnerID=8YFLogxK
U2 - 10.1016/j.poly.2009.02.038
DO - 10.1016/j.poly.2009.02.038
M3 - Article
AN - SCOPUS:65549088424
SN - 0277-5387
VL - 28
SP - 1490
EP - 1496
JO - Polyhedron
JF - Polyhedron
IS - 8
ER -