Miscibility between Differently Shaped Mesogens: Structural and Morphological Study of a Phthalocyanine-Perylene Binary System

Publication type:
Journal article
Metadata:
Autoren
  • Gael Zucchi
  • Pascal Viville
  • Bertrand Donnio
  • Alexandru Vlad
  • Sorin Melinte
  • Mihail Mondeshki
  • Robert Graf
  • Hans Wolfgang Spiess
  • Yves H Geerts
  • Roberto Lazzaroni
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000265269100014&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1021/jp809591h
Externe Identifier
  • Clarivate Analytics Document Solution ID: 434IT
  • PubMed Identifier: 19301888
ISSN
1520-6106
Ausgabe der Veröffentlichung
16
Zeitschrift
JOURNAL OF PHYSICAL CHEMISTRY B
Paginierung
5448 - 5457
Datum der Veröffentlichung
2009
Status
Published
Titel
Miscibility between Differently Shaped Mesogens: Structural and Morphological Study of a Phthalocyanine-Perylene Binary System
Sub types
  • Article
Ausgabe der Zeitschrift
113

Data source: Web of Science (Lite)

Other metadata sources:
Autoren
  • Gaël Zucchi
  • Pascal Viville
  • Bertrand Donnio
  • Alexandru Vlad
  • Sorin Melinte
  • Mihail Mondeshki
  • Robert Graf
  • Hans Wolfgang Spiess
  • Yves H Geerts
  • Roberto Lazzaroni
DOI
10.1021/jp809591h
eISSN
1520-5207
ISSN
1520-6106
Ausgabe der Veröffentlichung
16
Zeitschrift
The Journal of Physical Chemistry B
Sprache
en
Online publication date
2009
Paginierung
5448 - 5457
Datum der Veröffentlichung
2009
Status
Published
Herausgeber
American Chemical Society (ACS)
Herausgeber URL
http://dx.doi.org/10.1021/jp809591h
Datum der Datenerfassung
2023
Titel
Miscibility between Differently Shaped Mesogens: Structural and Morphological Study of a Phthalocyanine-Perylene Binary System
Ausgabe der Zeitschrift
113

Data source: Crossref

Abstract
The thermotropic, structural, and morphological properties of blends of a disk-like liquid crystalline phthalocyanine derivative and a lath-shaped perylenetetracarboxidiimide mesogen derivative have been studied by combining differential scanning calorimetry, thermal polarized optical microscopy, X-ray diffraction, solid-state nuclear magnetic resonance, and atomic force microscopy. The two compounds are fully miscible for blends containing at least 60 mol % of the disk-like molecule. In such composition range, the homogeneous blends form a columnar hexagonal (Col(h)) mesophase for which the thermal stability is enhanced compared to that of the corresponding mesophase of the pure phthalocyanine. The miscible blends self-align homeotropically between two glass slides. For blends containing between 55 and 40 mol % of the disk-shaped molecule, the two components are fully miscible at high temperature but the perylene derivative forms a separate crystalline phase when the temperature is decreased. Phase separation is systematically observed in blends containing less than 40 mol % of the discotic molecule. In this case, the resulting Col(h) mesophase is less stabilized compared to the blends containing a larger amount of the phthalocyanine derivative. These phase-separated blends do not show any homeotropic alignment. AFM investigations confirm the formation of a single columnar morphology in the phthalocyanine-rich blends, consistent with the full miscibility between the two compounds. Solid-state NMR measurements on the mixed phase show the influence of the presence of the perylene molecules on the molecular dynamics of the molecules; remarkably, the presence of the host molecules improves the local order parameter in the phthalocyanine columnar phase.
Addresses
  • Laboratoire de Chimie des Polymeres, Universite Libre de Bruxelles, Boulevard du Triomphe, B-1050 Bruxelles, Belgium. gael.zucchi@cea.fr
Autoren
  • Gaël Zucchi
  • Pascal Viville
  • Bertrand Donnio
  • Alexandru Vlad
  • Sorin Melinte
  • Mihail Mondeshki
  • Robert Graf
  • Hans Wolfgang Spiess
  • Yves H Geerts
  • Roberto Lazzaroni
DOI
10.1021/jp809591h
eISSN
1520-5207
Externe Identifier
  • PubMed Identifier: 19301888
Open access
false
ISSN
1520-6106
Ausgabe der Veröffentlichung
16
Zeitschrift
The journal of physical chemistry. B
Schlüsselwörter
  • Indoles
  • Perylene
  • Crystallography, X-Ray
  • Magnetic Resonance Spectroscopy
  • Temperature
  • Molecular Structure
  • Particle Size
  • Solubility
  • Electrons
  • Models, Molecular
  • Liquid Crystals
  • Isoindoles
Sprache
eng
Medium
Print
Paginierung
5448 - 5457
Datum der Veröffentlichung
2009
Status
Published
Datum der Datenerfassung
2009
Titel
Miscibility between differently shaped mesogens: structural and morphological study of a phthalocyanine-perylene binary system.
Sub types
  • Research Support, Non-U.S. Gov't
  • Journal Article
Ausgabe der Zeitschrift
113

Data source: Europe PubMed Central

Abstract
The thermotropic, structural, and morphological properties of blends of a disk-like liquid crystalline phthalocyanine derivative and a lath-shaped perylenetetracarboxidiimide mesogen derivative have been studied by combining differential scanning calorimetry, thermal polarized optical microscopy, X-ray diffraction, solid-state nuclear magnetic resonance, and atomic force microscopy. The two compounds are fully miscible for blends containing at least 60 mol % of the disk-like molecule. In such composition range, the homogeneous blends form a columnar hexagonal (Col(h)) mesophase for which the thermal stability is enhanced compared to that of the corresponding mesophase of the pure phthalocyanine. The miscible blends self-align homeotropically between two glass slides. For blends containing between 55 and 40 mol % of the disk-shaped molecule, the two components are fully miscible at high temperature but the perylene derivative forms a separate crystalline phase when the temperature is decreased. Phase separation is systematically observed in blends containing less than 40 mol % of the discotic molecule. In this case, the resulting Col(h) mesophase is less stabilized compared to the blends containing a larger amount of the phthalocyanine derivative. These phase-separated blends do not show any homeotropic alignment. AFM investigations confirm the formation of a single columnar morphology in the phthalocyanine-rich blends, consistent with the full miscibility between the two compounds. Solid-state NMR measurements on the mixed phase show the influence of the presence of the perylene molecules on the molecular dynamics of the molecules; remarkably, the presence of the host molecules improves the local order parameter in the phthalocyanine columnar phase.
Autoren
  • Gaël Zucchi
  • Pascal Viville
  • Bertrand Donnio
  • Alexandru Vlad
  • Sorin Melinte
  • Mihail Mondeshki
  • Robert Graf
  • Hans Wolfgang Spiess
  • Yves H Geerts
  • Roberto Lazzaroni
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/19301888
DOI
10.1021/jp809591h
ISSN
1520-6106
Ausgabe der Veröffentlichung
16
Zeitschrift
J Phys Chem B
Schlüsselwörter
  • Crystallography, X-Ray
  • Electrons
  • Indoles
  • Isoindoles
  • Liquid Crystals
  • Magnetic Resonance Spectroscopy
  • Models, Molecular
  • Molecular Structure
  • Particle Size
  • Perylene
  • Solubility
  • Temperature
Sprache
eng
Country
United States
Paginierung
5448 - 5457
Datum der Veröffentlichung
2009
Status
Published
Datum, an dem der Datensatz öffentlich gemacht wurde
2009
Titel
Miscibility between differently shaped mesogens: structural and morphological study of a phthalocyanine-perylene binary system.
Sub types
  • Journal Article
  • Research Support, Non-U.S. Gov't
Ausgabe der Zeitschrift
113

Data source: PubMed

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