title: Route to a family of robust, non-interpenetrated metal-organic frameworks with pto-like topology.
abstract: A combination of topological rules and quantum chemical calculations has facilitated the development of a rational metal-organic framework (MOF) synthetic strategy using the tritopic benzene-1,3,5-tribenzoate (btb) linker and a neutral cross-linker 4,4'-bipyridine (bipy). A series of new compounds, namely [M(2)(bipy)](3)(btb)(4) (DUT-23(M), M = Zn, Co, Cu, Ni), [Cu(2)(bisqui)(0.5)](3)(btb)(4) (DUT-24, bisqui = diethyl (R,S)-4,4'-biquinoline-3,3'-dicarboxylate), [Cu(2)(py)(1.5)(H(2)O)(0.5)](3)(btb)(4) (DUT-33, py = pyridine), and [Cu(2)(H(2)O)(2)](3)(btb)(4) (DUT-34), with high specific surface areas and pore volumes (up to 2.03 m(3)  g(-1) for DUT-23(Co)) were synthesized. For DUT-23(Co), excess storage capacities were determined for methane (268 mg g(-1) at 100 bar and 298 K), hydrogen (74 mg g(-1) at 40 bar and 77 K), and n-butane (99 mg g(-1) at 293 K). DUT-34 is a non-cross-linked version of DUT-23 (non-interpenetrated pendant to MOF-14) that possesses open metal sites and can therefore be used as a catalyst. The accessibility of the pores in DUT-34 to potential substrate molecules was proven by liquid phase adsorption. By exchanging the N,N donor 4,4'-bipyridine with a substituted racemic biquinoline, DUT-24 was obtained. This opens a route to the synthesis of a chiral compound, which could be interesting for enantioselective separation.
authors.affiliation: Department of Inorganic Chemistry, Dresden University of Technology, Bergstrasse 66, 01062 Dresden, Germany.
authors.forename: Nicole
authors.initials: N
authors.lastname: Klein
authors.forename: Irena
authors.initials: I
authors.lastname: Senkovska
authors.forename: Igor A
authors.initials: IA
authors.lastname: Baburin
authors.forename: Ronny
authors.initials: R
authors.lastname: Grünker
authors.forename: Ulrich
authors.initials: U
authors.lastname: Stoeck
authors.forename: Maurice
authors.initials: M
authors.lastname: Schlichtenmayer
authors.forename: Barbara
authors.initials: B
authors.lastname: Streppel
authors.forename: Uwe
authors.initials: U
authors.lastname: Mueller
authors.forename: Stefano
authors.initials: S
authors.lastname: Leoni
authors.forename: Michael
authors.initials: M
authors.lastname: Hirscher
authors.forename: Stefan
authors.initials: S
authors.lastname: Kaskel