Author/Authors :
Martin Kubala، نويسنده , , Jan Vacek، نويسنده , , Igor Popa، نويسنده , , Marika Janovsk?، نويسنده , , Pavel Kosina، نويسنده , , Jitka Ulrichov?، نويسنده , , Zden?k Tr?vn??ek، نويسنده , , Vil?m ?im?nek، نويسنده ,
Abstract :
The fluorescence properties of protopine and allocryptopine in aqueous and organic environments are described for the first time. The fluorescence of alkaloids and their pH-dependent interconversion to cationic forms (transannular interaction) were studied using steady-state and time-resolved fluorescence techniques. For the analysis of tricyclic base and cis/trans tetracyclic cations of the alkaloids, NMR and X-ray crystallography were used.
Keywords :
Allocryptopine , fluorescence , isomers , NMR , X-ray crystallography , Protopine
