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Pulsed and cw EPR studies on hydrogen atoms encaged in octasilsesquioxane molecules
Author(s) -
Schoenfeld R. S.,
Harneit W.,
Paech M.
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200669186
Subject(s) - electron paramagnetic resonance , hydrogen , chemistry , relaxation (psychology) , molecule , ion , nuclear magnetic resonance , crystallography , physics , organic chemistry , psychology , social psychology
We report on the synthesis of hydrogen atoms in different Si 8 O 12 R 8 cages (R = (CH 2 ) n H with n = 0–3) by both radiation chemistry and ion implantation. The efficiencies of both mechanisms have been studied quantitatively and attempts to optimise the process have been made. Spectral properties and relaxation times were investigated using both cw and pulsed EPR measurements. The Hahn Echo decay behaviour and the dependence of T 1 and T 2 on the side groups R of the cage revealed information about the predominant relaxation mechanisms. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)