Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 42, Issue 2, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.202000469
Keywords
adsorption removal; microporous organic polymers; nitroaromatic explosives; photocatalytic degradation; sensing
Categories
Funding
- Institute of Minerals & Materials Technology (IMMT) under Council of Scientific & Industrial Research (CSIR)
- Science and Engineering Research Board (SERB), Govt. of India [YSS/2015/001772]
- CSIR
- UGC
- SERB, New Delhi
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ACzMOP is a highly multitasking 3D polycarbazole-based microporous organic polymer with excellent physicochemical stability and sensitivity, capable of detecting and removing nitroaromatic contaminants efficiently.
A highly multitasking 3D polycarbazole based microporous organic polymer (ACzMOP) is rationally prepared via a low-cost FeCl3 catalyzed polymerization route utilizing a newly developed Td -symmetric adamantane core tetracarbazolic monomer. The nitrogen-rich ACzMOP integrated with photo-redox active electron-rich pi-conjugated polycarbazole modules featuring large BET surface area of 1568 m (2 )g (-1), pore volume of 1.58 cc g (-1), excellent physicochemical stability, and strong fluorescence in both aqueous and solid phases. Aqueous suspension including ACzMOP coated paper strip is highly responsive to the aqueous solution of nitroaromatics especially 2,4-dinitrotoluene, an unavoidable intermediate of 2,4,6-trinitrotoluene contamination, with ultra-trace level detection capability (up to 0.32 ppb). The thin layer of solid polymer is capable of detecting nitroaromatic vapors, especially nitrotoluenes in a very sensitive manner. Moreover, the polymer exhibit record uptake of nitrotoluenes and nitrophenols with maximum uptake capability up to 510 mg g (-1 ) setting a new benchmark among known porous materials. The polymer efficiently degrades toxic 4-nitrophenol to the value-added 4-aminophenol precursor (TOF = 0.143 h (-1)) via photocatalytic pathway. For the very first time, ACzMOP as a single material system is capable of efficiently sensing and removing all sorts of nitroaromatic contaminations with regenerability under mild washing/vacuum conditions.
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