Papers by nur lailatul fitria
ChemInform, 1989
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Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1988
Electron nuclear double resonance (ENDOR) studies have been performed on the different radical st... more Electron nuclear double resonance (ENDOR) studies have been performed on the different radical states of flavin model compounds in isotropic fluid solution, in reversed micelles and in frozen solution. Sets of hyperfine coupling constants were evaluated, allowing conclusions about the influence of different substituents on the spin-density distributions within the isoalloxazine ring system. It was shown that reversed micelles offer a very promising approach to overcome the stability problems often met with flavin radicals. Powder-type ENDOR spectra have been obtained from the radical states of a variety of flavoproteins. It was demonstrated that information about enzyme–substrate interactions is accessible since these interactions cause spin-density redistributions which are reflected in changes of the hyperfine data.
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Magnetic Resonance in Chemistry, 1985
A variety of substituted phenothiazine cation radicals, including those from pharmacologically ac... more A variety of substituted phenothiazine cation radicals, including those from pharmacologically active derivatives, e.g. chlorpromazine, alimemazine and laevomepromazine, have been studied by means of ENDOR and TRIPLE resonance spectroscopy. These techniques allowed accurate determinations of hyperfine coupling constants, including their signs. Conclusions concerning molecular structure (e.g. twist angles) could be drawn, supporting previous investigations of the interrelationship of molecular conformations with the pharmacological potential, i.e. neuroleptic, antihistaminic or anti‐Parkinsonian.
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Papers by nur lailatul fitria