Issue 42, 2016

Topological control of 3,4-connected frameworks based on the Cu2-paddle-wheel node: tbo or pto, and why?

Abstract

Two trigonal tritopic ligands with different conformational degree of freedom: conformationally labile H3tcbpa (tris((4-carboxyl)phenylduryl)amine) and conformationally obstructed H3hmbqa (4,4′,4′′-(4,4,8,8,12,12-hexamethyl-8,12-dihydro-4H-benzo[9,1]quino-lizino[3,4,5,6,7-defg]acridine-2,6,10-triyl)tribenzoic acid) are assembled with square-planar paddle-wheel nodes with the aim of selective engineering of the frameworks with tbo and pto underlying net topologies. In the case of H3tcbpa, both topological types were obtained forming non-interpenetrated MOFs namely DUT-63 (tbo) and DUT-64 (pto). Whereas synthesis of DUT-63 proceeds under typical conditions, formation of DUT-64 requires an additional topology directing reagent (topological modifier). Solvothermal treatment of the conformationally hindered H3hmbqa ligand with the Cu-salt results exclusively in DUT-77 material, based on the single pto net. The possibility to insert the salen based metallated pillar ligand into networks with pto topology post-synthetically results in DUT-78 and DUT-79 materials (both ith-d) and opens new horizons for post-synthetic insertion of catalytically active metals within the above-mentioned topological type of frameworks.

Graphical abstract: Topological control of 3,4-connected frameworks based on the Cu2-paddle-wheel node: tbo or pto, and why?

Supplementary files

Article information

Article type
Paper
Submitted
07 Jul 2016
Accepted
12 Aug 2016
First published
12 Aug 2016
This article is Open Access
Creative Commons BY license

CrystEngComm, 2016,18, 8164-8171

Topological control of 3,4-connected frameworks based on the Cu2-paddle-wheel node: tbo or pto, and why?

P. Müller, R. Grünker, V. Bon, M. Pfeffermann, I. Senkovska, M. S. Weiss, X. Feng and S. Kaskel, CrystEngComm, 2016, 18, 8164 DOI: 10.1039/C6CE01513A

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