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Palmer U, Puchta R. Wirt-Gast-Komplexe von [bfu.bfu.bfu]: Vorhersage von Ionenselektivitäten mittels quantenchemischer Rechnungen XIII. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2020. [DOI: 10.1515/znb-2020-0065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The CH2–O–C2H4–O–CH2 moieties in Lehn’s cryptand [2.2.2] have been substituted by 2,2′-bifurane groups to get the cryptand [bfu.bfu.bfu]. The ion selectivity of this new cryptand was investigated by DFT calculations (RB3LYP/LANL2DZp, RB3LYP/LACVP*, RBP86/LANL2DZp and RBP86/LACVP*) based on model equations and analysis of the [M ⊂ bfu.bfu.bfu]
n+ cryptate structures. The cryptand [bfu.bfu.bfu] is best suited for the alkali cations Na+ and K+, and the alkaline earth cation Sr2+ followed by Ca2+. The cavity of [bfu.bfu.bfu] is thus similar to that in [phen.phen.phen] or [bpy.bpy.bpy]. The selectivity of [bfu.bfu.bfu] is due to the flexibility of the OCCO und CN···NC dihedral angles. The results are independent of the selected DFT methods.
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Affiliation(s)
- Ursula Palmer
- Anorganische Chemie, Department Chemie und Pharmazie , Universität Erlangen-Nürnberg , Egerlandstr. 1, 91058 Erlangen , Germany
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- Anorganische Chemie, Department Chemie und Pharmazie , Universität Erlangen-Nürnberg , Egerlandstr. 1, 91058 Erlangen , Germany
- Computer Chemie Center, Department Chemie und Pharmazie , Universität Erlangen-Nürnberg , Nägelsbachstr. 25, 91052 Erlangen , Germany
- Zentralinstitut für Scientific Computing (ZISC) , Universität Erlangen-Nürnberg , Martensstr. 5a, 91058 Erlangen , Germany
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