| Title: | Stimuli-Responsive Metal-Organic Framework (MOF) with Chemo-Switchable Properties for Colorimetric Detection of CHCl(3) |
| Author(s): | Razavi SAA; Masoomi MY; Morsali A; |
| Address: | "Department of Chemistry, Faculty of Science, Tarbiat Modares University, Tehran, Islamic Republic of Iran" |
| ISSN/ISBN: | 1521-3765 (Electronic) 0947-6539 (Linking) |
| Abstract: | "The ligands 3,6-di(pyridin-4-yl)-1,4-dihydro-1,2,4,5-tetrazine (H(2) DPT), as a pillar spacer, and 4,4'-oxybis(benzoic acid) (H(2) OBA), as a dicarboxylate linker, have been used to develop a dihydrotetrazine-functionalized pillared metal-organic framework (MOF), [Zn(OBA)(H(2) DPT)(0.5) ]?naDMF (TMU-34), as a functionally convertible stimuli-responsive MOF-based sensor. Sonochemically synthesized TMU-34 powder has been employed in the sensing of volatile organic compounds (VOCs). The results show that TMU-34 can act as a solid-state, naked-eye visual chemosensor for the detection of chloroform in the liquid and gas phases. TMU-34, as a chemo-switchable MOF with rapid response, undergoes a significant color change from yellow to pink through reversible dynamic conversion of dihydrotetrazine into tetrazine upon exposure to chloroform in the presence of other VOCs. Whereas other colorimetric MOF-based sensors show a wide range of color changes in the presence of different analytes, TMU-34 undergoes a color change only in the presence of chloroform. A mechanism for the observed color change is proposed on the basis of UV/Vis and (1) H NMR spectroscopic studies. These observations reveal that TMU-34 represents one of the most promising candidates for the highly selective and sensitive detection of chloroform" |
| Keywords: | chemo-switching chemosensing chloroform dihydro-tetrazine metal-organic frameworks sensors; |
| Notes: | "PubMed-not-MEDLINERazavi, Sayed Ali Akbar Masoomi, Mohammad Yaser Morsali, Ali eng Germany 2017/06/18 Chemistry. 2017 Sep 12; 23(51):12559-12564. doi: 10.1002/chem.201702127. Epub 2017 Aug 10" |
