MOF Decomposition and Introduction of Repairable Defects Using a Photodegradable Strut

Autor: François-Xavier Coudert, Jingjing Yan, John C. MacDonald, Shawn C. Burdette, Alex R. Maag
Přispěvatelé: Worcester Polytechnic Institute, Institut de Recherche de Chimie Paris (IRCP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Ministère de la Culture (MC)
Rok vydání: 2019
Předmět:
Zdroj: Chemistry-A European Journal
Chemistry-A European Journal, Wiley-VCH Verlag, 2019, 25 (35), pp.8393-8400. ⟨10.1002/chem.201901213⟩
ISSN: 1521-3765
0947-6539
DOI: 10.1002/chem.201901213⟩
Popis: International audience; Photoswitchable components can modulate the properties of metal organic frameworks (MOFs); however, photolabile building blocks remain underexplored. A new strut NPDAC (2‐nitro‐1,4‐phenylenediacetic acid) that undergoes photodecarboxylation has been prepared and incorporated into a MOF, using post‐synthetic linker exchange (PSLE) from the structural analogue containing PDAC (p‐phenylenediacetic acid). Irradiation of NPDAC‐MOF leads to MOF decomposition and concomitant formation of amorphous material. In addition to complete linker exchange, MOFs containing a mixture of PDAC and NPDAC can be obtained through partial linker exchange. In NPDAC30‐MOF, which contains approximately 30 % NPDAC, the MOF retains crystallinity after irradiation, but the MOF contains defect sites consistent with loss of decarboxylated NPDAC linkers. The defect sites can be repaired by exposure to additional PDAC or NPDAC linkers at a much faster rate than the initial exchange process. The photoremoval and replacement process may lead to a more general approach to customizable MOF structures.
Databáze: OpenAIRE
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