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Readily prepared metallo-supramolecular triple helicates designed to exhibit spin-crossover behaviour
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UNSPECIFIED (2004) Readily prepared metallo-supramolecular triple helicates designed to exhibit spin-crossover behaviour. CHEMISTRY-A EUROPEAN JOURNAL, 10 (22). pp. 5737-5750. doi:10.1002/chem.200400518
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Official URL: http://dx.doi.org/10.1002/chem.200400518
Abstract
New dinuclear supramolecular cylinders have been designed to exhibit spin-crossover behaviour, a form of molecular bistability. This has been achieved within the framework of our imine-based approach to supramolecular architecture by switching from pyridylimine systems to imidazolimines. Spin-crossover behaviour is achieved while retaining the simplicity and ease-of-synthesis of our molecular design. The imidazole groups used also introduce additional NH groups that engage in hydrogen-bonding to anions and solvents. In the case of the iron(II) tetrafluoroborate complex this hydrogen bonding links supramolecular cylinders into an extended two-dimensional array. Consistent with this, a sharper spin-crossover transition is observed for this compound than for the corresponding hexafluorophosphate salt. More subtle anion effects are indicated in the perchlorate salt which gives a two-step spin conversion, thereby displaying tristability.
Item Type: | Journal Item | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Journal or Publication Title: | CHEMISTRY-A EUROPEAN JOURNAL | ||||
Publisher: | WILEY-V C H VERLAG GMBH | ||||
ISSN: | 0947-6539 | ||||
Official Date: | 19 November 2004 | ||||
Dates: |
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Volume: | 10 | ||||
Number: | 22 | ||||
Number of Pages: | 14 | ||||
Page Range: | pp. 5737-5750 | ||||
DOI: | 10.1002/chem.200400518 | ||||
Publication Status: | Published |
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