Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 25, Pages 21438-21446Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b04201
Keywords
Carbazolic; gas uptake; iodide sensing; mercury sensing; regeneration; reversibility
Funding
- 973 Program [2012CB821701]
- NSFC [21101102]
- 10 000 Plan for Talents
- Shanxi Province Science Foundation for Youths [2012021008-2]
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A multifunctional carbazolic porous framework (Cz-TPM), with a tetrahedral core, has been synthesized by FeCl3 oxidative coupling polymerization. The BrunauerEmmettTeller surface area of the obtained polymers reaches 713.2 m(2) g(-1). Gas adsorption isotherms show that Cz-TPM exhibits large carbon dioxide (97.9 mg g(-1), 9.8 wt %, 273 K, and 1 bar) and hydrogen uptake capacities (149.3 cm(3) g(-1), 1.34 wt %, 77 K, and 1 bar). Furthermore, Cz-TPM has been found to display tandem visual detection of iodide and mercury, respectively. The Cz-TPM dispersion turns to yellow in the presence of iodide salts and subsequently changes to nearly colorless on addition of Hg2+ salts that could be easily observed by the naked eye. Cz-TPM can detect I- via turn off fluorescence quenching, and then the in situ generated Cz-TPM@I complexes can recognize Hg2+ ions via turn on fluorescence recovery. More importantly, Cz-TPM is stable over common solvents and can be easily recovered by excessive water washing and centrifugation for further repeated use. As far as we know, carbazolic porous organic frameworks enabling detection of I- and Hg2+ have not been reported.
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