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Single crystals of DPPH grown from diethyl ether and carbon disulfide solutions – Crystal structures, IR, EPR and magnetization studies

Žilić, Dijana; Pajić, Damir; Jurić, Marijana; Molčanov, Krešimir; Rakvin, Boris; Planinić, Pavica; Zadro, Krešo (2010) Single crystals of DPPH grown from diethyl ether and carbon disulfide solutions – Crystal structures, IR, EPR and magnetization studies. Journal of Magnetic Resonance, 207 (1). pp. 34-41. ISSN 1090-7807

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Abstract

Single crystals of the free radical 2, 2-diphenyl-1-picrylhydrazyl (DPPH) obtained from diethyl ether (ether) and carbon disulfide (CS2) were characterized by the X-ray diffraction, IR, EPR and SQUID magnetization techniques. The X-ray structural analysis and IR spectra showed that the DPPH form crystallized from ether (DPPH1) is solvent free, whereas that one obtained from CS2 (DPPH2) is a solvate of the composition 4DPPH CS2. Principal values of the g-tensor were estimated by the X-band EPR spectroscopy at room and low (10 K) temperatures. Magnetization studies revealed the presence of antiferromagnetically coupled dimers in both types of crystals. However, the way of dimerization as well as the strength of exchange couplings are different in the two DPPH samples, which is in accord with their crystal structures. The obtained results improved parameters accuracy and enabled better understanding of properties of DPPH as a standard sample in the EPR spectrometry.

Item Type: Article
Additional Information: D. Zilic is grateful to D. Merunka for the useful discussion. This research was supported by the Ministry of Science, Education and Sports of the Republic of Croatia (Projects 098-0982915-2939, 098-0982904-2946, 098-1191344-2943 and 119-1191458-1017)
Uncontrolled Keywords: DPPH; crystal structure; diethyl ether; carbon disulfide; EPR; magnetization
Subjects: NATURAL SCIENCES > Physics > Condensed Matter Physics
NATURAL SCIENCES > Chemistry > Inorganic Chemistry
Divisions: Division of Materials Chemistry
Division of Physical Chemistry
Projects:
Project titleProject leaderProject codeProject type
Nanomagneti-Krešo Zadro119-1191458-1017MZOS
Protein-ligand međudjelovanja na atomnoj razini-Marija Luić098-1191344-2943MZOS
Višenuklearni metalni sustavi: sinteza i svojstva-Berislav Perić098-0982904-2946MZOS
Molekulska struktura i dinamika sustava s paramagnetskim česticama-Marina Ilakovac-Kveder098-0982915-2939MZOS
Depositing User: Dijana Žilić
Date Deposited: 24 Feb 2017 11:48
Last Modified: 24 Feb 2017 11:48
URI: http://fulir.irb.hr/id/eprint/3395
DOI: 10.1016/j.jmr.2010.08.005

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