Readily prepared metallo-supramolecular triple helicates designed to exhibit spin-crossover behaviour. Tuna, F., Lees, M., R., Clarkson, G., J., & Hannon, M., J. Chemistry-a European Journal, 10(22):5737-5750, 2004. Website abstract bibtex 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.
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title = {Readily prepared metallo-supramolecular triple helicates designed to exhibit spin-crossover behaviour},
type = {article},
year = {2004},
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pages = {5737-5750},
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notes = {ISI Document Delivery No.: 871OA<br/>Times Cited: 38<br/>Cited Reference Count: 117<br/>Tuna, F Lees, MR Clarkson, GJ Hannon, MJ<br/>Wiley-blackwell<br/>Malden},
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.},
bibtype = {article},
author = {Tuna, F and Lees, M R and Clarkson, G J and Hannon, M J},
journal = {Chemistry-a European Journal},
number = {22}
}
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