Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/2106Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Venugopalan, S. | - |
| dc.contributor.author | Fernandes, J.R. | - |
| dc.contributor.author | Vani, G.V. | - |
| dc.date.accessioned | 2007-02-08T08:44:33Z | - |
| dc.date.available | 2007-02-08T08:44:33Z | - |
| dc.date.issued | 1975 | - |
| dc.identifier.citation | Molecular Crystals and Liquid Crystals, 1975, Vol.31, p29-46 | en |
| dc.identifier.issn | 1058-725X | - |
| dc.identifier.uri | http://hdl.handle.net/2289/2106 | - |
| dc.description | Restricted Access | en |
| dc.description.abstract | The far-infrared and the Raman spectra of crystalline CBOOA (N-p-cyanobenzilidene-p-n- octyloxyaniline) have been studied above 30 cm-1. The temperature dependence of the far- infrared spectrum reveals the existence of a solid-solid transition at 65 degree C. The two solid modifi- cations can be obtained, respectively, from solvent crystallization (Phase 11) and solidification from the mesophase (Phase I). Differential scanning calorimetric results confirm that an endo- thermic change from Phase II to Phase I occurs at 65 degree C with an associated heat of transition of 2030 cal/mole. X-ray powder diffraction patterns establish that the structures of the two phases are different. Tentative vibrational assignments are made for the far-infrared and the Raman lines observed in the internal mode region. At frequencies below 120 cm-1, both the far-infrared and the Raman spectra of Phase II exhibit distinct modes whereas, Phase I exhibits nearly quasicontinuous spectra. The possible implications of this result for the structure of Phase I and the formation of the mesophase are discussed. | en |
| dc.format.extent | 613650 bytes | - |
| dc.format.mimetype | application/pdf | - |
| dc.language.iso | en | en |
| dc.publisher | Gorden and Breach Science Publishers | en |
| dc.rights | 1975 Gorden and Breach Science Publishers | en |
| dc.title | Far-infrared and Raman spectra of the solid phases of CBOOA | en |
| dc.type | Article | en |
| Appears in Collections: | Research Papers (SCM) | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 1975 MCLC V31 p29.pdf Restricted Access | Restricted Access | 599.27 kB | Adobe PDF | View/Open Request a copy |
Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.