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Takeharu Yoshii, Koki Chida, Hirotomo Nishihara, Fumito Tani, Ordered carbonaceous frameworks: a new class of carbon materials with molecular-level design, CHEMICAL COMMUNICATIONS, 10.1039/d1cc07228e, 2022.03, Ordered carbonaceous frameworks (OCFs) are a new class of carbon materials with a three-dimensional ordered structure synthesized by simple carbonization of metalloporphyrin crystals with polymerizable moieties. Carbonization via solid-state polymerization results in the formation of graphene-based ordered frameworks in which regularly aligned single-atomic metals are embedded. These unique structural features afford molecular-level designability like organic-based frameworks together with high electrical conductivity, thermal/chemical stability, and mechanical flexibility, towards a variety of applications including electrocatalysis and force-driven phase transition. This feature article summarizes the synthetic strategies and characteristics of OCFs in comparison with conventional organic-based frameworks and porous carbons, to discuss the potential applications and further development of the OCF family.. |
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Fumito Tani, Masahiro Narita, Toshihiro Murafuji , Helicene Radicals: Molecules Bearing a Combination of Helical Chirality and Unpaired Electron Spin , ChemPlusChem , 10.1002/cplu.202000452, 2020.09, Chiral helicenes that have helical π-conjugated frameworks comprised of ortho-fused aromatic rings have been intensively investigated for several decades owing to their attractive properties and high potential for a variety of applications. In contrast, studies concerning helicene radicals (open-shell heli- cenes) formed by redox reactions have been severely limited due to inherent high reactivity of organic radicals. However, open-shell helicenes possessing a combination of chirality and
unpaired electron spin(s) delocalized on helical π-conjugated orbital(s) are promising for novel synergic magnetic functions. Recently, several kinds of isolable air-stable helicene radicals have been prepared to enable their detailed analysis of the crystal structures and physicochemical properties. This Minire- view describes the recent advances and future prospects of organic-based helicene radicals categorized into three groups: 1) ionic radicals, 2) neutral radicals, and 3) diradicals.. |
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New reaction intermediates in oxygen activation by multinuclear copper complexes. |
