Highly crystalline poly(heptazine imides) by mechanochemical synthesis for photooxidation of various organic substrates using an intriguing electron acceptor – Elemental sulfur

摘要: Abstract Low-defect potassium poly(heptazine imide) (PHIK-BM) was engineered for application in photocatalytic oxidation of organic substrates. Mechanochemical pretreatment a mixture 5-aminotetrazole LiCl/KCl eutectics using high-energy ball milling afforded highly homogeneous that, upon sequential thermolysis at 600 °C, gave nanosized particles PHIK–BM. The activity the free-standing PHIK–BM plates assessed benzyl alcohol to benzaldehyde under visible light irradiation elemental sulfur as an electron acceptor. Both quantitative conversion (>99%) and selectivity (>98%) with respect were achieved. developed method extended aliphatic coupled multicomponent Hantzsch 1,4-dihydropyridine synthesis. These 1,4-dihydropyridines also photocatalytically oxidized by corresponding substituted pyridines, very good yields mild metal-free conditions.