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Light-induced bistability in the 2D coordination network {[Fe(bbtr)3][BF4]2}∞: wavelength-selective addressing of molecular spin states.
Autorzy
Rok wydania
2013
Czasopismo
Numer woluminu
19
Strony
11418-11428
DOI
10.1002/chem.201301257
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Where as the neat polymeric FeII compound {[Fe(bbtr)3][ClO4]2}∞ (bbtr=1,4‐di(1,2,3‐triazol‐1‐yl)butane) shows an abrupt spin transition centered at 107 K facilitated by a crystallographic symmetry breaking, in the covalently linked 2D coordination network of {[Fe(bbtr)3][BF4]2}∞, FeII stays in the high‐spin state down to 10 K. However, strong cooperative effects of elastic origin result in reversible, persistent, and wavelength‐selective photoswitching between the low‐spin and high‐spin manifolds. This compound thus shows true light‐induced bistability below 100 K. The persistent bidirectional optical switching behavior is discussed as a function of temperature, irradiation time, and intensity. Crystallographic studies reveal a photoinduced symmetry breaking and serve to establish the correlation between structure and cooperative effects. The static and kinetic behavior is explicated within the framework of the mean‐field approximation.
Słowa kluczowe
cooperative effects, Iron, photoinduced bistability, photoswitching, Spin crossover
Adres publiczny
http://dx.doi.org/10.1002/chem.201301257
Strona internetowa wydawcy
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