期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 35, 页码 13450-13457出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta04623a
关键词
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资金
- Ghent Univ. (GOA) [01G00710]
- Scientific Research-Foundation Flanders (FWO)
- Spanish Ministry of Economy and Competitiveness [MAT2013-44463-R]
- Junta de Andalucia [P10-FQM-6181]
- Junta de Andalucia (Andalucia Talent Hub)
- FEDER Funds
- ACT-C
- Japan Science and Technology Agency (JST)
- BMBF [OptiMat 03SF0492C]
- HHU SFF fund
- University of Cordoba
A highly photoluminescent (PL) porous covalent triazine-based framework (PCTF-8) is synthesized from tetra(4-cyanophenyl) ethylene by using trifluoromethanesulfonic acid as the catalyst at room temperature. Due to triazine units in the framework, the PCTF-8 exhibits excellent thermal stability (>400 degrees C). The Brunauer-Emmett-Teller (BET) specific surface area of PCTF-8 is 625 m(2) g(-1) which is lower than the one obtained from the synthesis under Lewis acid conditions (ZnCl2). At 1 bar and 273 K, the PCTF-8 adsorbs a significant amount of CO2 (56 cm(3) g(-1)) and CH4 (17 cm(3) g(-1)) which is highly comparable to nanoporous 1,3,5-triazine frameworks (NOP-1-6, 29-56 cm(3) g(-1)). This nitrogen rich framework exhibits good ideal selectivity (61 : 1 (85% N-2 : 15% CO2) at 273 K, 1 bar). Thus, it can be used as a promising candidate for potential applications in post-combustion CO2 capture and sequestration technologies. In addition, photoluminescence properties as well as the sensing behaviour towards nitroaromatics have been demonstrated. The fluorescence emission intensity of PCTF-8 is quenched by ca. 71% in the presence of 2,4,6-trinitrophenol (TNP). From time-resolved studies, a static quenching behaviour was found. This high photoluminescence property is used for hydrogen evolving organic photocatalysis from water in the presence of a sacrificial electron donor and a cocatalyst.
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