Spectroscopic and theoretical studies of fluorescence effects in bio-active: 4-(5-(methyl-1,3,4-thiadiazol-2-yl))benzene-1,3-diol and 4-(5-(methylamino-1,3,4-thiadiazol-2-yl))benzene-1,3-diol compounds: Effect of molecular aggregation and amino group posi

Upper left corner -MTB molecule (without the NH group - only with the CH3 group), lower left corner - fluorescence emission spectra for MTB in the pH range from 1 to 7 (dual fluorescence effect). Upper right corner -MATB molecule (with the NH and CH3 groups), lower right corner - fluorescence emission spectra for MATB at pH from 1 to 7 (two clearly overlapping fluorescence emissions).165