✦ LIBER ✦

An electron spin-echo study of Cu(II)-(His)n in frozen aqueous solution

✍ Scribed by M. Romanelli; R. Basosi

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 405 KB
Volume: 143
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(88)87056-8

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✦ Synopsis

Two-pulse and three-pulse electron spin-echo techniques are used to study the molecular arrangement of the Cu(II)-(His). system in D,O solution at pD= 7.3. The 14N nuclei of the imidazole ring were selectively isotopically substituted by "N. From a computer-aided analysis of the nuclear modulation patterns in the time domain it is concluded that at low temperatures and in the presence of excess histidine the predominant species is in a configuration in which the cupric ion is surrounded by two imidazole nitrogen atoms, two amino nitrogen atoms and two solvent molecules.

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