Readily prepared metallo-supramolecular triple helicates designed to exhibit spin-crossover behaviour
UNSPECIFIED (2004) Readily prepared metallo-supramolecular triple helicates designed to exhibit spin-crossover behaviour. CHEMISTRY-A EUROPEAN JOURNAL, 10 (22). pp. 5737-5750. ISSN 0947-6539Full text not available from this repository.
Official URL: http://dx.doi.org/10.1002/chem.200400518
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|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||CHEMISTRY-A EUROPEAN JOURNAL|
|Publisher:||WILEY-V C H VERLAG GMBH|
|Date:||19 November 2004|
|Number of Pages:||14|
|Page Range:||pp. 5737-5750|
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