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A photoluminescent covalent triazine framework: CO2 adsorption, light-driven hydrogen evolution and sensing of nitroaromatics
Univ Ghent, Ctr Ordered Mat Organomet & Catalysis, Dept Inorgan & Phys Chem, Krijgslaan 281-S3, B-9000 Ghent, Belgium.;Univ Dusseldorf, Inst Anorgan Chem & Strukturchem, D-40204 Dusseldorf, Germany..
Univ Ghent, Ctr Ordered Mat Organomet & Catalysis, Dept Inorgan & Phys Chem, Krijgslaan 281-S3, B-9000 Ghent, Belgium.;Univ Cordoba, Fac Sci, Dept Organ Chem, Nanochem & Fine Chem Res Inst IUIQFN, Campus Rabanales,Marie Curie Bldg,Ctra Nal 4, E-14071 Cordoba, Spain..
Univ Dusseldorf, Inst Anorgan Chem & Strukturchem, D-40204 Dusseldorf, Germany..
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
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2016 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 4, no 35, 13450-13457 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2016. Vol. 4, no 35, 13450-13457 p.
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Materials Chemistry
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URN: urn:nbn:se:uu:diva-304548DOI: 10.1039/c6ta04623aISI: 000382656500012OAI: oai:DiVA.org:uu-304548DiVA: diva2:1033361
Available from: 2016-10-06 Created: 2016-10-06 Last updated: 2017-11-30Bibliographically approved

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