Abstract
The structural difference between five sulfa drug compounds and their Ru(III) complexes with 1:2 molar ratio were examined using the positron annihilation Doppler broadening (PADB) spectroscopy. The PADB measurements were performed with a HPGe -ray spectrometer. The change of defect structure due to the Ru(III) complexation process was confirmed. The correlation between the DP line-shape parameters (S and W) and the previous reported results of the microanalytical, physicochemical, biological and positron annihilation lifetime (PAL) measurements of sulfa drug Ru(III) complexes were examined.