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Defect/Edge‐Selective Functionalization of Carbon Materials by “Direct” Friedel–Crafts Acylation Reaction
Author(s) -
Seo JeongMin,
Tan LoonSeng,
Baek JongBeom
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201606317
Subject(s) - materials science , friedel–crafts reaction , surface modification , graphene , oxidizing agent , acylation , carbon nanotube , graphite , nitric acid , sulfuric acid , graphite oxide , carbon fibers , oxide , organic chemistry , chemical engineering , nanotechnology , chemistry , composite material , catalysis , composite number , engineering , metallurgy
Popularly utilized oxidation media, via nitric acid/sulfuric acid mixtures, are too corrosive and oxidizing to preserve structural integrity of highly ordered graphitic materials (carbon nanotubes (CNTs) and graphene). Here, for the most commonly used oxidation method, the important advantages of defect/edge‐selective functionalization of carbon materials (CNTs/graphene/graphite) in a polyphosphoric acid (PPA)/phosphorous pentoxide (P 2 O 5 ) medium are elucidated. The optimized PPA/P 2 O 5 medium is a mild acid that is not only less corrosive than popularly utilized oxidation media, but also has a strong capability to drive Friedel–Crafts acylation by covalently modifying carbon materials. With a broader spectrum of functional groups accessible, the PPA/P 2 O 5 ‐driven Friedel–Crafts acylation offers more options for tailoring the properties and processing of carbon materials.