Asymmetry in liquid crystalline hexaalkoxytriphenylene discotics

I. Paraschiv; P. Delforterie; M. Giesbers; M.A. Posthumus; A.T.M. Marcelis; H. Zuilhof; E.J.R. Sudhölter

doi:10.1080/02678290500286913

Asymmetry in liquid crystalline hexaalkoxytriphenylene discotics

I. Paraschiv, P. Delforterie, M. Giesbers, M.A. Posthumus, A.T.M. Marcelis, H. Zuilhof, E.J.R. Sudhölter

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

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Abstract

The synthesis and phase behaviour of a new series of unsymmetrically substituted hexaalkoxytriphenylene¿based liquid crystals are reported. One of the hexyloxy chains in hexahexyloxytriphenylene (HAT6) is replaced by either a shorter or a longer chain, HAT¿(OC 6 H 13 ) 5 (OC n H 2 n +1 ). Compounds with chain lengths n of 2¿14, 16 and 18 were prepared and investigated. Compounds with n ¿13 were not liquid crystalline. For all compounds with n ¿12 Col h textures were observed by polarizing microscopy. X¿ray investigations showed that the intercolumnar distance gradually increased with n from n = 2 to n = 12, while the interdisk distance (3.6 Å) remained constant. A small odd¿even effect on the increase of the intercolumn distance with n was observed. This effect was also found in the change of ¿ H of isotropization with n

Original language	English
Pages (from-to)	977-983
Journal	Liquid Crystals
Volume	32
Issue number	8
DOIs	https://doi.org/10.1080/02678290500286913
Publication status	Published - 2005

Keywords

intermolecular organization
mesomorphic properties
alkyl chains
columnar
interdigitation
mesogens

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10.1080/02678290500286913

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title = "Asymmetry in liquid crystalline hexaalkoxytriphenylene discotics",

abstract = "The synthesis and phase behaviour of a new series of unsymmetrically substituted hexaalkoxytriphenylene¿based liquid crystals are reported. One of the hexyloxy chains in hexahexyloxytriphenylene (HAT6) is replaced by either a shorter or a longer chain, HAT¿(OC 6 H 13 ) 5 (OC n H 2 n +1 ). Compounds with chain lengths n of 2¿14, 16 and 18 were prepared and investigated. Compounds with n ¿13 were not liquid crystalline. For all compounds with n ¿12 Col h textures were observed by polarizing microscopy. X¿ray investigations showed that the intercolumnar distance gradually increased with n from n = 2 to n = 12, while the interdisk distance (3.6 {\AA}) remained constant. A small odd¿even effect on the increase of the intercolumn distance with n was observed. This effect was also found in the change of ¿ H of isotropization with n",

keywords = "intermolecular organization, mesomorphic properties, alkyl chains, columnar, interdigitation, mesogens",

author = "I. Paraschiv and P. Delforterie and M. Giesbers and M.A. Posthumus and A.T.M. Marcelis and H. Zuilhof and E.J.R. Sudh{\"o}lter",

year = "2005",

doi = "10.1080/02678290500286913",

language = "English",

volume = "32",

pages = "977--983",

journal = "Liquid Crystals",

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publisher = "Taylor & Francis",

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TY - JOUR

T1 - Asymmetry in liquid crystalline hexaalkoxytriphenylene discotics

AU - Paraschiv, I.

AU - Delforterie, P.

AU - Giesbers, M.

AU - Posthumus, M.A.

AU - Marcelis, A.T.M.

AU - Zuilhof, H.

AU - Sudhölter, E.J.R.

PY - 2005

Y1 - 2005

N2 - The synthesis and phase behaviour of a new series of unsymmetrically substituted hexaalkoxytriphenylene¿based liquid crystals are reported. One of the hexyloxy chains in hexahexyloxytriphenylene (HAT6) is replaced by either a shorter or a longer chain, HAT¿(OC 6 H 13 ) 5 (OC n H 2 n +1 ). Compounds with chain lengths n of 2¿14, 16 and 18 were prepared and investigated. Compounds with n ¿13 were not liquid crystalline. For all compounds with n ¿12 Col h textures were observed by polarizing microscopy. X¿ray investigations showed that the intercolumnar distance gradually increased with n from n = 2 to n = 12, while the interdisk distance (3.6 Å) remained constant. A small odd¿even effect on the increase of the intercolumn distance with n was observed. This effect was also found in the change of ¿ H of isotropization with n

AB - The synthesis and phase behaviour of a new series of unsymmetrically substituted hexaalkoxytriphenylene¿based liquid crystals are reported. One of the hexyloxy chains in hexahexyloxytriphenylene (HAT6) is replaced by either a shorter or a longer chain, HAT¿(OC 6 H 13 ) 5 (OC n H 2 n +1 ). Compounds with chain lengths n of 2¿14, 16 and 18 were prepared and investigated. Compounds with n ¿13 were not liquid crystalline. For all compounds with n ¿12 Col h textures were observed by polarizing microscopy. X¿ray investigations showed that the intercolumnar distance gradually increased with n from n = 2 to n = 12, while the interdisk distance (3.6 Å) remained constant. A small odd¿even effect on the increase of the intercolumn distance with n was observed. This effect was also found in the change of ¿ H of isotropization with n

KW - intermolecular organization

KW - mesomorphic properties

KW - alkyl chains

KW - columnar

KW - interdigitation

KW - mesogens

U2 - 10.1080/02678290500286913

DO - 10.1080/02678290500286913

M3 - Article

SN - 0267-8292

VL - 32

SP - 977

EP - 983

JO - Liquid Crystals

JF - Liquid Crystals

IS - 8

ER -

Asymmetry in liquid crystalline hexaalkoxytriphenylene discotics

Abstract

Keywords

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