Kurpil, BogdanSavateev, AleksandrPapaefthimiou, VasilikiZafeiratos, SpyridonHeil, TobiasOzenler, SibelAntonietti, Markus2021-01-082021-01-0820170926-33731873-3883http://doi.org/10.1016/j.apcatb.2017.06.036https://hdl.handle.net/20.500.12846/242Ozenler, Sibel/0000-0002-8498-6799; Antonietti, Markus/0000-0002-8395-7558; PAPAEFTHYMIOU, VASILIKI/0000-0001-8341-6658; Zafeiratos, Spyridon/0000-0001-8165-2585; Heil, Tobias/0000-0003-4458-7387WOS:000405158000061Pyrazine rings are a fundamental part of folic acid and flavine - cofactors that participate in natural electron transfer processes. Electron deficient carbon nitrides, more specifically poly(heptazine imides) (PHI), emulating the structure of these pyrazine based cofactors were synthesized polymerizing 3-amino-1,2,4-triazole-5-thiol with hexaazatriphenylene-hexacarbonitrile or hexaazatriphenylene-hexaamide at 550 degrees C in the eutectic mixture of KCl/LiCl. The role of hexaazatriphenylene units is 1) to create electron deficient acceptor sites in the structure of semiconductor; 2) widen the spectral coverage up to near infrared region. The significantly increased oxidative power of such doped PHI was demonstrated by running oxygen evolution from water, 0.59 mu mol h(-1), under visible light irradiation in the absence of any metal co-catalyst. (C) 2017 Elsevier B.V. All rights reserved.eninfo:eu-repo/semantics/closedAccessPoly(Heptazine Imide)Hexaazatriphenylene-HexacarbonitrileCarbon NitrideWater OxidationWater ReductionArticle21710.1016/j.apcatb.2017.06.036622628Q1Q1WOS:0004051580000612-s2.0-85020825584