Rational synthesis and dimensionality tuning of MOFs from preorganized heterometallic molecular complexes
Abstract
Rational synthesis of a series of new heterometallic MOFs was carried out by the judicious choice of the corresponding pivalate complexes [Li2M2(piv)(6)(py)(2)] (M = Zn2+, Co2+, piv(-) = pivalate anion and py = pyridine) as a source of secondary building units, {LiM(O2CR)(3)} and an organic tricarboxylate linker as a node defining the dimensionality of the framework by the orientation of the carboxylic group in or out of the central aromatic ring plane. Thus the trimesate (btc(3-)) linker results in 3D srs topology frameworks with intersecting systems or isolated channels, and 1,3,5-benzenetribenzoate (btb(3-)) results in layered hcb isostructural compounds additionally stabilized with H-pi interactions between the layers. The layered compounds demonstrate a permanent porosity with a BET surface area of up to 688 m(2)center dot g(-1) with the possibility of selective gas adsorption (CO2 over N-2 and CH4). Zn-Based coordination polymers show notable color changes and drastic (up to 30 times) quenching of luminescence upon inclusion of different nitroaromatics.
Domains
Coordination chemistry
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Sapianik et al. - 2019 - Rational synthesis and dimensionality tuning of MO.pdf (1.21 Mo)
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