✦ LIBER ✦

ENDOR studies of hydrogen bonding of the AsO4−4 centre in x-ray irradiated KH2AsO4

✍ Scribed by N.S. Dalal; C.A. McDowell; R. Srinivasan

Publisher: Elsevier Science
Year: 1969
Tongue: English
Weight: 410 KB
Volume: 4
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(69)85079-7

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✦ Synopsis

We here report what we believe to be an important method for studying hydrogen bonding in systems containing a pllramagnetic centre. The technique of electron-nuclear double resonance (ENDOR) has been applied to study the hydrogen-bond network around the AsOF\_ centre in X-ray irradiated XII+0 BNDOR transitions from several sets of hydrogen nuclei surroun&ng the centre were observed at 4.20 8' and the spectra for two sets of neighhouring nuclei are identiited. The angular dependence9 for these spectra are fitted with a spin-Hamiltonian to obtain the isotropic and tisotropic magnetic hvperfine constants. The results are discussed in terms of the available spectroecopic and crystaIlographic data on KB2As04 and the order-disorder model of ferroelectrictricity in this class of crystals. In recent years the KECSPO4-type of ferro-eIec?rics &3F? receiv& cuM&&?r~~~e &?RClB, ~?A& &??&%z QC C!z &%??&!Qz.~~ <R ti&=&q and par@ because %e microzxrrpic na-&xz of ferroelectricity in these compounds is not pet corn@ ex%y cl ear 2 I-Baker )2>Ex3 recofl3zea

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