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Understanding the composition and structure of porous clay heterostructures (PCHs) is of great importance in clarifying the topological design and performance of PCHs in applications. In this paper, we investigated the chemical composition and structural characteristics of PCHs in detail by thermal analysis, major elements analysis, XPS, FTIR, 29Si MAS NMR, XRD, HRTEM, and nitrogen adsorption/desorption...
Several novel azacalix[4]aromatics constituting terphenylene units have been synthesized via sequential nucleophilic aromatic substitution reactions of 5′-t-butyl-(1,1′:3′,1″-terphenyl)-3,3″-diamine 9 and 5′-t-butyl-(1,1′:3′,1″-terphenyl)– 4,4″-diamine 11 with 1,5-difluoro-2,4-dinitrobenzene and cyanuric chloride, respectively. The bridging –NH– functions of the tetra-nitro substituted azacalix[2]arene[2]terphenylenes...
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