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Title: | Quadrupole effects in the EPR spectra of bis [1, 3-di (p-n-octyloxyphenyl propane-1, 3 dionato] Cu(II]: Role in phase transitions |
Authors: | Bose, Monisha Sadashiva, B.K. |
Issue Date: | 1991 |
Publisher: | Gordon and Breach Science Publishers. |
Citation: | Molecular Crystals and Liquid Crystals Letters, 1992, Vol.8, p137-143 |
Abstract: | X band studies of alkyl/alkloxy phenyl substituted Cu complexes indicate that only C80-Cu exhibits a complex hyperfine structure (h.f.s.) at 300K. It also undergoes a first-order phase transition around 213K. However, the complex h.f .s. could not be delineated at X band. In the Q band, in addition to the four permitted h.f. lines, 10 for- bidden lines due to quadrupole effects are obser- ved. Further, the forbidden lines disappear in the discophase but the permitted h.f. lines remain. This difference between C80-Cu and C8Cu could be explained from their crystal structures. In C80-Cu, the repeating unit is a Cu dimer, as oppo- sed to a single Cu atom placed at the inversion centre in C Cu. Distortion in the dimer, possibly n accounts for the observed quadrupole effects. |
Description: | Restricted Access. |
URI: | http://hdl.handle.net/2289/3001 |
ISSN: | 0140-6566 |
Copyright: | 1992 OPA (Overseas Publishers Association) N.V. |
Appears in Collections: | Research Papers (SCM) |
Files in This Item:
File | Description | Size | Format | |
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1992 MCLC Lett V8 p137-143.pdf Restricted Access | Restricted Access. | 282 kB | Adobe PDF | View/Open Request a copy |
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