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2D EPR investigation of endohedral La@C82 in solution

✍ Scribed by M. Rübsam; M. Plüschau; P. Schweitzer; K.-P. Dinse; D. Fuchs; H. Rietschel; R.H. Michel; M. Benz; M.M. Kappes

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
538 KB
Volume
240
Category
Article
ISSN
0009-2614

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✦ Synopsis

The analysis of a two-dimensional EPR spectrum gives direct evidence for a dominant nuclear quadrupole interaction at the site of the encapsulated La3+ ion. From the observed nuclear spin transition rates we deduce eQV,,/[ I(21 -l)h] = OS(3) MHz, assuming that the correlation time of the electric field gradient axes is determined by molecular reorientation of the molecule in solution. The non-vanishing value of the quadrupole interaction is further proof for an off-center position of the metal ion.

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