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Molecular adsorption\/desorption experiments indicated that these MOFs are flexible and change their structure upon adsorption\/desorption of organic solvents and gas molecules. These MOFs exhibit unprecedented properties that allow controlling their flexibility by adding a functional group onto the central benzene ring of the organic ligand. For example, the introduction of electron\u2010donating substituents increases the robustness of the resulting MOFs. These MOFs also exhibit flexibility\u2010dependent differences in gas\u2010adsorption and \u2010separation performance. Thus, this study represents the first example of controlling the flexibility of MOFs with the same topological structure via the substituent effect of functional groups introduced into the organic ligand.<\/jats:p>","DOI":"10.1002\/chem.202203442","type":"journal-article","created":{"date-parts":[[2023,2,20]],"date-time":"2023-02-20T01:39:56Z","timestamp":1676857196000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Controlling the Flexibility of Carbazole\u2010Based Metal\u2013Organic Frameworks by Substituent Effects"],"prefix":"10.1002","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9275-9476","authenticated-orcid":false,"given":"Koh","family":"Sugamata","sequence":"first","affiliation":[{"name":"College of Science Department of Chemistry Rikkyo University  3-34-1 Nishi-Ikebukuro 171-8501 Toshima-ku Tokyo 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