Millimeter magnetic spectroscopy of paramagnetic complexes Cr(V)

Author

Belyaev, A. ; Vorobyova, N. ; Dzyubak, A. ; Ivanchenko, I. ; Karelin, S. ; Karnauhov, I. ; Lukhanin, A. ; Orlov, V. ; Popenko, N.

Author_Institution

Inst. of Radiophys. & Electron., Acad. of Sci., Kharkov, Ukraine

Volume

2

fYear

2001

fDate

2001

Firstpage

826

Abstract

The obtained results of the complex spectroscopic studies of static and dynamic characteristics of the EHBA(Cr^V) and HMBA(Cr^V) complexes diluted in propanediol show that the maximum polarization is achieved for the paramagnetic center concentration N=0.6×10²⁰ - 1.2×10²⁰ cm ^-3. It has been determined that the "dynamic cooling with the burnt out hole" is the dominating mechanism of dynamic nuclear polarisation (DNP) for both complexes. However, in contrast to the HMBA(Cr^V) complex the effective diffusion of nuclear spin temperature is the distinctive feature of the nuclear spin kinetics in the EHBA(Cr^V) complex caused by a different chemical structure of the used organic acid

Keywords

EPR line breadth; chromium compounds; dynamic nuclear polarisation; millimetre wave spectra; organic compounds; Cr(V) paramagnetic complexes; DNP; EHBA(Cr^V) complexes; HMBA(Cr^V) complexes; burnt out hole dynamic cooling; chemical structure; dynamic characteristics; dynamic nuclear polarisation; maximum polarization; millimeter magnetic spectroscopy; nuclear spin kinetics; nuclear spin temperature effective diffusion; organic acid; paramagnetic center concentration; propanediol; static characteristics; Chaos; Cooling; Electrons; Frequency; Magnetic resonance; Paramagnetic materials; Paramagnetic resonance; Polarization; Shape; Spectroscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Physics and Engineering of Millimeter and Sub-Millimeter Waves, 2001. The Fourth International Kharkov Symposium on

Conference_Location

Kharkov

Print_ISBN

0-7803-6473-2

Type

conf

DOI

10.1109/MSMW.2001.947325

Filename

947325