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J of Incl. Phen. Macr. Chem. 2011 71-3-4-363-369.pdf788KbAdobe PDFView/Open
Title :Photo-switchable spin-crossover iron(III) compound based on intermolecular interactions
Authors :Shimizu, Tetsuya
Komatsu, Yasuka
Kamihata, Hidenobu
Lee, Young Hoon
Fuyuhiro, Akira
Iijima, Seiichiro
Hayami, Shinya
Issue Date :Dec-2011
Citation jtitle :Journal of Inclusion Phenomena and Macrocyclic Chemistry
vol. :71
no. :3-4
start page :363
end page :369
Abstract :Iron(III) spin-crossover compounds, [Fe(qnal)2]CF3SO3・MeOH (1・MeOH) and [Fe(qual)2]CF3SO3・acetone (1・acetone) were prepared and their spin transition properties were characterized by magnetic susceptibility measurement, Mӧssbauer spectroscopy and single crystal analysis. Two iron(III)compounds exhibited abrupt spin transition with thermal hysteresis loop(T1/2↑=115 K and T1/2↓=104 K for 1・MeOH, and T1/2↑=133 K and T1/2↓=130 K for 1・acetone). Single crystal analysis revealed both of the structures in high-spin(HS)and low-spin(LS)states for 1・acetone. The difference of bond length between the HS and LS states for 1・acetone was~0.10 Å, which was corresponding to that of typical iron(III)SCO compounds. Specially, it showed strong intermolecular interactions by π-π stacking formed between the neighbor complexes leading to 2-D sheet. Both 1・MeOH and 1・acetone exhibited LIESST effect when it was illuminated at 1000 nm. We also confirmed that the introduction of strong intermolecular interactions, such as π-π stacking, can play an important role in LIESST effect.
URL :http://link.springer.com/article/10.1007%2Fs10847-011-9960-3
Type Local :雑誌掲載論文
ISSN :09230750
Publisher :Springer
Rights :© 2011 Springer
URI :http://hdl.handle.net/2298/26582
Appears in Collections:Journal Article (Sciende)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2298/26582