Here, two new kinds of porous polymers (denoted as TPT-CMP and BFT-CMP), comprising full sp2-carbon skeletons connected through vinylidene linkages, are synthesized by acid-catalyzed Knoevenagel condensation of ethene-1,1,2,2-tetrayl-tetrakis-1,1′-biphenyl-4-carbaldehyde and 9,9′-bifluoren...
Our results indicate that sp2-diamond is more stable than previously proposed K4-carbon and T-carbon, and cubic-graphite is even more stable than superhard M-carbon, W-carbon and Z-carbon.The calculations on vibrational properties show that both structures are dynamically stable. Interestingly, ...
conjugated polymerscovalent organic frameworksNADH regenerationphotocatalysistwo-dimensional materialsThe synthesis of fully conjugated sp2 -carbon covalent organic frameworks (COF) is extremely challenging given the difficulty of the formation of very stable carbon-carbon double bonds (-C=C-). Here, we ...
sp2 Carbon-Hydrogen Bond (C-H) Functionalization(sp2碳氢键(C-H)功能化) 下载文档 收藏 打印 转格式 89阅读文档大小:3.14M113页cocobohe上传于2020-03-27格式:PDF Pd-Catalyzed C-H Bond Functionalization on the Indole and Pyrrole Nucleus 热度: ...
sp2 carbonIn this work, we report a novel two-dimensional (2D) sp carbon-linked conjugated polymer framework (2D CCP-HATN) with a nitrogen-doped skeleton, a periodical dual-pore structure and high chemical stability. The chemical identity of the polymer backbone consisting of hexaazatri...
The second is nucleophilic 1,3-substitution on sp- and sp2-carbon of acetylenic, allenic, and cumulenic derivatives which is a three step process. The third mechanism is electrophilic 1,3-subsitutions. The example of this mechanism is the reduction of acetylenic halides with a zinc–copper ...
William Suggs J, Cox SD (1981) Directed cleavage of sp 2 - sp carbon–carbon bonds. J Organomet Chem 221:199–201Suggs, J. W.; Cox, S. D. Directed Cleavage of Sp2-Sp Carbon-Carbon Bonds. J. Organomet. Chem. 1981, 221, 199-201....
A sp2-carbon-linked covalent organic framework (COF) containing tetraphenylethene units was successfully synthesized by using 2,2'-(1,4-phenylene)diacetonitrile and 4′,4‴,4‴'',4‴'''-(Ethene-1,1,2,2-tetrayl)tetrakis(([1,1′-biphenyl]-4-carbaldehyde)) as monomers. After being ...
several examples ofsp2-carbon COFs have been reported, such assp2c-COF34, TP-COF35, Por-sp2c-COF33, and g-C34N6-COF36. However, their application for the detection or extraction of UO22+has not been explored. More importantly, the exploration of COFs for fluorescence detection of UO22...
The sp2c-COF is a semiconductor with a discrete band gap of 1.9 electron volts and can be chemically oxidized to enhance conductivity by 12 orders of magnitude. The generated radicals are confined on the pyrene knots, enabling the formation of a paramagnetic carbon structure with high spin ...