The complex is formed according to the reaction: Fe3+ + SCN- ↔ Fe(NCS)2+ Addition of Fe3+ or SCN- will push the equilibrium to the right, forming more complex and intensifying the color; while ...

Using electron paramagnetic resonance (EPR) spectroscopy, Fe3+ and Cr3+ defects were detected in as-received STO samples. After annealing the samples, Fe3+ defects were not detected in both the SrO ...