Synthesis and liquid crystal properties of phthalocyanine bearing a star polytetrahydrofuran moiety

Yeşim H. Gursel; B. Filiz Senkal; Mehmet Kandaz; Fahrettin Yakuphanoglu

doi:10.1016/j.poly.2009.02.038

Synthesis and liquid crystal properties of phthalocyanine bearing a star polytetrahydrofuran moiety

Yeşim H. Gursel, B. Filiz Senkal, Mehmet Kandaz^*, Fahrettin Yakuphanoglu

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1490-1496
Number of pages	7
Journal	Polyhedron
Volume	28
Issue number	8
DOIs	https://doi.org/10.1016/j.poly.2009.02.038
Publication status	Published - 10 Jun 2009

Funding

This work was supported by Research Funds of Sakarya University and TUBİTAK (Project No. TBAG: 108T094), the Management Unit of Scientific Research Projects of Firat University (FUBAP) under Project 1230 and Turkish Scientific and Technological Research Council of Turkey (TUBİTAK) (Project No. 106T406).

Funders	Funder number
FUBAP	1230
TUBİTAK	108T094
Turkish Scientific and Technological Research Council of TURKEY	106T406
Sakarya Üniversitesi
Firat University Scientific Research Projects Management Unit

Keywords

Cationic
Cobalt
Liquid crystal
Metal-ion sensing
Phthalocyanine
Polymerization

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10.1016/j.poly.2009.02.038

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title = "Synthesis and liquid crystal properties of phthalocyanine bearing a star polytetrahydrofuran moiety",

abstract = "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.",

keywords = "Cationic, Cobalt, Liquid crystal, Metal-ion sensing, Phthalocyanine, Polymerization",

author = "Gursel, {Ye{\c s}im H.} and Senkal, {B. Filiz} and Mehmet Kandaz and Fahrettin Yakuphanoglu",

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AU - Gursel, Yeşim H.

AU - Senkal, B. Filiz

AU - Kandaz, Mehmet

AU - Yakuphanoglu, Fahrettin

PY - 2009/6/10

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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.

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KW - Metal-ion sensing

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KW - Polymerization

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Synthesis and liquid crystal properties of phthalocyanine bearing a star polytetrahydrofuran moiety

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