Discotic liquid crystals of transition metal complexes: 28. Temperature-dependent electronic spectra and X-ray structural analysis of discotic liquid crystalline bis(octakisdodecyloxyphthalocyaninato)lutetium(III) complex
✍ Scribed by Rie Naito; Kazuchika Ohta; Hirofusa Shirai
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 145 KB
- Volume
- 05
- Category
- Article
- ISSN
- 1088-4246
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✦ Synopsis
An unidentified mesophase D ~x~ of bis(octakisdodecyloxyphthalocyaninato)lutetium(III) reported by us in 1997 was reinvestigated by temperature-dependent X-ray diffraction and temperature-dependent electronic spectra of the thin film. The D ~x~ phase was thus established as a novel type of D ~ro~ (P2~1~/a) mesophase in which two different stacking distances h~t~ and h~f~ exist. It was also revealed that the step-up increase of electroconductivity is attributable to the step-up enlargement of π-π overlap of Pc macrocycles according to the phase transitions crystal → D ~ro~ (P2~1~/a) → D ~ho~ . This is strongly related to delocalization of the radical electron.