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Template‐ and Metal‐Free Synthesis of Nitrogen‐Rich Nanoporous “Noble” Carbon Materials by Direct Pyrolysis of a Preorganized Hexaazatriphenylene Precursor
Author(s) -
Walczak Ralf,
Kurpil Bogdan,
Savateev Aleksandr,
Heil Tobias,
Schmidt Johannes,
Qin Qing,
Antonietti Markus,
Oschatz Martin
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201804359
Subject(s) - carbonization , noble metal , nanoporous , pyrolysis , microporous material , materials science , chemical engineering , carbon fibers , adsorption , molecule , condensation , nitrogen , thermal decomposition , porosity , metal , inorganic chemistry , nanotechnology , chemistry , organic chemistry , metallurgy , physics , engineering , composite number , composite material , thermodynamics
The targeted thermal condensation of a hexaazatriphenylene‐based precursor leads to porous and oxidation‐resistant (“noble”) carbons. Simple condensation of the pre‐aligned molecular precursor produces nitrogen‐rich carbons with C 2 N‐type stoichiometry. Despite the absence of any porogen and metal species involved in the synthesis, the specific surface areas of the molecular carbons reach up to 1000 m 2 g −1 due to the significant microporosity of the materials. The content and type of nitrogen species is controllable by the carbonization temperature whilst porosity remains largely unaffected at the same time. The resulting noble carbons are distinguished by a highly polarizable micropore structure and have thus high adsorption affinity towards molecules such as H 2 O and CO 2 . This molecular precursor approach opens new possibilities for the synthesis of porous noble carbons under molecular control, providing access to the special physical properties of the C 2 N structure and extending the known spectrum of classical porous carbons.