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Covalent Triazine Frameworks (CTFs) have provided a unique platform in functional material design for a wide range of applications. Herein, we report a series of new CTFs with two new heteroaromatic building blocks (pyrazole and isoxazole groups) aiming for carbon capture and storage (CCS) and catalysis. The CTFs were synthesized from their respective building blocks [(4,4'-(1H-pyrazole-3,5-diyl)dibenzonitrile (pyz) and 4,4'-(isoxazole-3,5-diyl)dibenzonitrile (isox))] under ionothermal conditions using ZnCl 2 . Both of the building blocks were designed by an organic transformation of an acetylacetone containing dinitrile linkers to pyrazole and isoxazole groups respectively. Due to this organic transformation, (i) linker aromatization, (ii) higher surface areas and nitrogen contents, (iii) higher aromaticity and (iv) higher surface basicity was achieved. Due to these enhanced properties, CTFs were explored for CO 2 uptake and metal free heterogeneous catalysis. Among all, the isox-CTF, synthesized at 400 °C, showed the highest CO 2 uptake (4.92 mmol/g at 273K and 2.98 mmol/g at 298 K at 1 bar). Remarkably, these CTFs showed excellent metal-free catalytic activity for the aerobic oxidation amine at mild reaction conditions. On studying the properties of the CTFs, it was observed that organic transformations and ligand aromatization of the materials are crucial factor to tune the important parameters that influence the CO 2 uptake and the catalytic activity.
This article was published in the following journal.
Name: Chemistry (Weinheim an der Bergstrasse, Germany)
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Open-label, randomized, microdose study
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A building block of penicillin, devoid of significant antibacterial activity. (From Merck Index, 11th ed)
Interruption of sympathetic pathways, by local injection of an anesthetic agent, at any of four levels: peripheral nerve block, sympathetic ganglion block, extradural block, and subarachnoid block.
A nucleoside diphosphate sugar which is formed from UDP-N-acetylglucosamine and phosphoenolpyruvate. It serves as the building block upon which peptidoglycan is formed.
Process for making, building or constructing a physical object from a three-dimensional digital model by laying down many successive thin layers of building material.
Visible morphologic changes in cells infected with viruses. It includes shutdown of cellular RNA and protein synthesis, cell fusion, release of lysosomal enzymes, changes in cell membrane permeability, diffuse changes in intracellular structures, presence of viral inclusion bodies, and chromosomal aberrations. It excludes malignant transformation, which is CELL TRANSFORMATION, VIRAL. Viral cytopathogenic effects provide a valuable method for identifying and classifying the infecting viruses.