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

被引：64

作者：

Savateev, Aleksandr ^{[1
]}

Dontsova, Dariya ^{[1
]}

Kurpil, Bogdan ^{[1
]}

Antonietti, Markus ^{[1
]}

机构：

[1] Max Planck Inst Colloids & Interfaces, Dept Colloid Chem, Res Campus Golm, D-14424 Potsdam, Germany

来源：

JOURNAL OF CATALYSIS | 2017年 / 350卷

关键词：

Carbon nitride; Poly(heptazine imide); Mechanochemistry; Photocatalysis; Hantzsch 1,4-dihydropyridine synthesis; Photocatalytic oxidation; Elemental sulfur; CARBON NITRIDE; HANTZSCH 1,4-DIHYDROPYRIDINES; TRANSFER HYDROGENATION; SOLAR-DRIVEN; OXIDATION; CATALYST; PHOTOCATALYST; ACTIVATION; REDUCTION; NANOTUBES;

D O I：

10.1016/j.jcat.2017.02.029

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Low-defect potassium poly(heptazine imide) (PHIK-BM) was engineered for application in photocatalytic' oxidation of organic substrates. Mechanochemical pretreatment of a mixture of 5-aminotetrazole in LiCl/KCI eutectics using high-energy ball milling afforded a highly homogeneous mixture that, upon sequential thermolysis at 600 degrees C, gave nanosized particles of PHIK-BM. The photocatalytic activity of the free-standing PHIK-BM plates was assessed in the oxidation of benzyl alcohol to benzaldehyde under visible light irradiation using elemental sulfur as an electron acceptor. Both quantitative conversion (>99%) of benzyl alcohol and selectivity (>98%) with respect to benzaldehyde were achieved. The developed method was extended to aliphatic alcohol oxidation coupled with multicomponent Hantzsch 1,4-dihydropyridine synthesis. These 1,4-dihydropyridines were also photocatalytically oxidized by PHIK-BM to the corresponding substituted pyridines, with very good yields and under mild metal-free conditions. (C) 2017 Elsevier Inc. All rights reserved.

引用

页码：203 / 211

页数：9

共 48 条

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