The University of Southampton
University of Southampton Institutional Repository

Temperature-resolved study of the structural behaviour of nickel octahexyl phthalocyanine up to the liquid crystal transition

Temperature-resolved study of the structural behaviour of nickel octahexyl phthalocyanine up to the liquid crystal transition
Temperature-resolved study of the structural behaviour of nickel octahexyl phthalocyanine up to the liquid crystal transition
This paper describes a temperature-resolved crystallographic investigation into the behaviour of the title compound as the temperature is increased stepwise from room temperature up to 418 K, which is the temperature at which a transition to a discotic columnar mesophase takes place. The experiments were conducted using synchrotron radiation on Station 9.8 at the SRS at the Daresbury Laboratory. An intermediate transition to a less well ordered crystal form was seen at 326 K and differential scanning calorimetry (DSC) measurements confirmed the transition temperature of this change. Also, a new improved room-temperature crystal structure was obtained, as well as further structure determinations at 323, 328 and 353 K. These showed that as the mobility, particularly of the hexyl groups, increases with temperature, the packing of the molecules adjusts from pseudohexagonal layers to a rectangular arrangement.
mesophase
617-624
Helliwell, M.
88b79c4c-3b44-453f-ad8c-b4b785137958
Teat, S. J.
cfd2e917-6e54-44cb-a63b-6c2dfe627782
Coles, S. J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8
Reeve, W.
08848c72-c183-476f-9abf-8e9c89372274
Helliwell, M.
88b79c4c-3b44-453f-ad8c-b4b785137958
Teat, S. J.
cfd2e917-6e54-44cb-a63b-6c2dfe627782
Coles, S. J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8
Reeve, W.
08848c72-c183-476f-9abf-8e9c89372274

Helliwell, M., Teat, S. J., Coles, S. J. and Reeve, W. (2003) Temperature-resolved study of the structural behaviour of nickel octahexyl phthalocyanine up to the liquid crystal transition. Acta Crystallographica Section B: Structural Science, 59, 617-624. (doi:10.1107/S0108768103014708).

Record type: Article

Abstract

This paper describes a temperature-resolved crystallographic investigation into the behaviour of the title compound as the temperature is increased stepwise from room temperature up to 418 K, which is the temperature at which a transition to a discotic columnar mesophase takes place. The experiments were conducted using synchrotron radiation on Station 9.8 at the SRS at the Daresbury Laboratory. An intermediate transition to a less well ordered crystal form was seen at 326 K and differential scanning calorimetry (DSC) measurements confirmed the transition temperature of this change. Also, a new improved room-temperature crystal structure was obtained, as well as further structure determinations at 323, 328 and 353 K. These showed that as the mobility, particularly of the hexyl groups, increases with temperature, the packing of the molecules adjusts from pseudohexagonal layers to a rectangular arrangement.

This record has no associated files available for download.

More information

Published date: 1 October 2003
Keywords: mesophase

Identifiers

Local EPrints ID: 19976
URI: http://eprints.soton.ac.uk/id/eprint/19976
PURE UUID: 1de85876-0822-495e-8724-1eb56b42b88c
ORCID for S. J. Coles: ORCID iD orcid.org/0000-0001-8414-9272

Catalogue record

Date deposited: 23 Feb 2006
Last modified: 16 Mar 2024 03:05

Export record

Altmetrics

Contributors

Author: M. Helliwell
Author: S. J. Teat
Author: S. J. Coles ORCID iD
Author: W. Reeve

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×