Abstract
The room temperature electronic absorption and fluorescence spectra of the pharmacologically active β-carboline alkaloids norharman, harmane, harmine, harmaline, reserpine and yohimbine are measured in moderately and highly concentrated hydroxide solutions. The appearance of a new fluorescence emission band in the latter madia for all the compounds under study was ascribed to anions in which the NH group of the indole ring is deprotonated. The differences between the acidities of their excited singlet states and their ground states are estimated by means of the Förster-Weller cycles.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
