The modulator driven polymorphism of Zr(IV) based metal–organic frameworks. (13th January 2017)

• Record Type: Journal Article
• Authors: Drache, Franziska; Bon, Volodymyr; Senkovska, Irena; Getzschmann, Jürgen; Kaskel, Stefan
• Is Part Of: Philosophical transactions. Volume 375:Number 2084(2017)
• Publication Date: 2017-01-13
• Subjects: zirconium -- metal–organic framework -- topology -- polymorphism -- 2 -- 5-thiophenedicarboxylic acid; Physical sciences -- Periodicals; Engineering -- Periodicals; Mathematics -- Periodicals; 500
• DOI: 10.1098/rsta.2016.0027
• Languages: English
• ISSNs: 1364-503X

Abstract

Abstract : The reaction of ZrCl4 and 2, 5-thiophenedicarboxylic acid (H2 tdc) in the presence of trifluoroacetic acid (Htfa) as modulator results in the formation of the new metal–organic framework (MOF) named DUT-126 (DUT = Dresden University of Technology). The nature and concentration of modulators are found to be decisive synthetic parameters affecting the topology of the formed product. DUT-126 (hbr ) extends the series of polymorphs differing in topology, namely DUT-67 (reo ), DUT-68 (bon ) and DUT-69 (bct ) to four, where DUT-67 and DUT-68 show the same eight-connected secondary building units as in DUT-126. In DUT-126, linker molecules have a peculiar orientation, resulting in hbr topology, which is described for the first time in this work for MOFs. DUT-126 contains three pore types, including two micropores surrounding mesoporous channels. DUT-126 is stable against hydrolysis and features permanent porosity with a specific surface area of 1297 m 2 g −1 and a total pore volume of 0.48 cm 3 g −1, calculated from the nitrogen physisorption isotherm measured at 77 K. This article is part of the themed issue 'Coordination polymers and metal–organic frameworks: materials by design'.