1. Open Access Kent State
  2. Micro-focus x-ray diffraction study of the columnar phase of porphyrin-based mesogens
Author(s)
Abstract

Porphyrin-based materials are prime candidates for solar energy harvesting applications. New compounds incorporating the porphyrin core, which exhibit the columnar liquid crystal (LC) phase, were synthesized as they offer a route to obtaining defect-free large area monodomain films. The structure of the phases exhibited by these materials has been probed by synchrotron X-ray diffraction with a microfocus (14ím x14 ím) beam. Exploiting the multidomain nature (i.e., having differently oriented crystal axes) of a thin glass cell, it was possible to obtain complete structural information without the need to have one single macroscopic crystal, which is normally difficult to obtain. The results confirmed the existence of the isotropic, discotic (columnar) LC, and discotic-ordered LC phases in these materials. The optical microscopic work demonstrates how macroscopic control of columnar orientations is achieved by manipulating the LC film thickness, substrate preparation, and the thermal annealing process.
Format
Article
Identifier(s)
10.1021/cm702063a
Publication Date
2007-01-01
Publication Title
Chemistry of Materials
Volume
19
First Page
5657
Last Page
5663
Keywords
Subject
Rights
http://rightsstatements.org/vocab/InC/1.0/
Community
Department of Physics
Permalink https://oaks.kent.edu/phypubs/116
Kang, S.-W., Li, Q., Chapman, B., Pindak, R., Cross, J., Li, L., Nakata, M., & Kumar, S. (2007). Micro-focus x-ray diffraction study of the columnar phase of porphyrin-based mesogens (1–). Chemistry of Materials. https://doi.org/10.1021/cm702063a
Kang, Shin-Woong, Quan Li, B. Chapman, R. Pindak, J. Cross, Lanfang Li, M. Nakata, and Satyendra Kumar. 2007. “Micro-Focus X-Ray Diffraction Study of the Columnar Phase of Porphyrin-Based Mesogens”. Chemistry of Materials. https://doi.org/10.1021/cm702063a.
Kang, Shin-Woong, et al. Micro-Focus X-Ray Diffraction Study of the Columnar Phase of Porphyrin-Based Mesogens. Chemistry of Materials, 1 Jan. 2007, https://doi.org/10.1021/cm702063a.