Synthesis and Characterization of 1,10-Phenanthroline-mono-N-oxides

N-oxides of N-heteroaromatic compounds find widespread applications in various fields chemistry. Although the strictly planar aromatic structure 1,10-phenanthroline (phen) is expected to induce unique features corresponding N-oxides, so far potential these has not been explored. In fact, appropriate procedure reported for synthesizing derivatives phen. Now, we provide a straightforward method synthesis series mono-N-oxides 1,10-phenanthrolines. The parent were oxidized by green oxidant, peroxomonosulfate ion acidic aqueous solution. products obtained high quality and at good excellent yields. A systematic study reveals clear-cut correlation between basicity electronic effects substituents on ring. UV spectra predicted DFT calculations TD-DFT/TPSSh/def2-TZVP level theory.