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          Institute: MPI für bioanorganische Chemie     Collection: MPI für bioanorganische Chemie     Display Documents



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ID: 734281.0, MPI für bioanorganische Chemie / MPI für bioanorganische Chemie
An Octanuclear Metallosupramolecular Cage Designed To Exhibit Spin-Crossover Behavior
Authors:Struch, Niklas; Bannwarth, Christoph; Ronson, Tanya K.; Lorenz, Yvonne; Mienert, Bernd; Wagner, Norbert; Engeser, Marianne; Bill, Eckhard; Puttreddy, Rakesh; Rissanen, Kari; Beck, Johannes; Grimme, Stefan; Nitschke, Jonathan R.; Luetzen, Aarne
Language:English
Date of Publication (YYYY-MM-DD):2017
Title of Journal:Angewandte Chemie-International Edition
Journal Abbrev.:Angew.Chem. Int. Ed.
Volume:56
Issue / Number:18
Start Page:4930
End Page:4935
Review Status:Internal review
Audience:Experts Only
Abstract / Description:By employing the subcomponent self-assembly approach utilizing 5,10,15,20-tetrakis(4-aminophenyl)porphyrin or its zinc(II) complex, 1H-4-imidazolecarbaldehyde, and either zinc(II) or iron(II) salts, we were able to prepare O-symmetric cages having a confined volume of ca. 1300 angstrom(3). The use of iron(II) salts yielded coordination cages in the high-spin state at room temperature, manifesting spin-crossover in solution at low temperatures, whereas corresponding zinc(II) salts led to the corresponding diamagnetic analogues. The new cages were characterized by synchrotron X-ray crystallography, high-resolution mass spectrometry, and NMR, Mossbauer, IR, and UV/Vis spectroscopy. The cage structures and UV/Vis spectra were independently confirmed by state-of-the-art DFT calculations. A remarkably high-spin-stabilizing effect through encapsulation of C-70 was observed. The spin-transition temperature T-1/2 is lowered by 20 K in the host-guest complex.
Comment of the Author/Creator:Date: 2017, APR 24 2017
External Publication Status:published
Document Type:Article
Version Comment:Automatic journal name synchronization
Communicated by:N. N.
Affiliations:MPI für bioanorganische Chemie
Identifiers:ISI:000399384700003 [ID No:1]
ISSN:1433-7851 [ID No:2]
DOI:10.1002/anie.201700832 [ID No:3]
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