Photoswitching of Nitroprussides |
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Authors: | Rusanov V Stankov Sv Trautwein A X |
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Institution: | 1.Department of Atomic Physics, University of Sofia, Faculty of Physics, 5 James Bourchier Blvd., 1126, Sofia, Bulgaria ;2.Institut für Physik, Universit?t zu Lübeck, Ratzeburger Allee 160, 23538, Lübeck, Germany ; |
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Abstract: | For 25 years the two metastable electronic states (SI and SII), accessible in the nitroprusside anion Fe(CN)5NO]2− (NP) by irradiation with blue polarized light, have been the subject of intense investigations from several research groups.
This review article summarizes the most important experimental results in the field of photochromatic effects investigated
by nuclear resonant methods. The experimentally determined data have been compared with the results derived from density functional
theory calculations. The majority of results convincingly indicates: (i) the SI state is represented by the isonitrosyl conformation
(Fe-O-N) of the (NO+)-group and (ii) the SII state is represented by a dynamic conformation, in which a bending vibration of Fe-O-N as well as
a rotation of the (NO+)-group around the main molecular axis simultaneously occur. A possible formation of a new third metastable state observed
in rare-earth nitroprussides, which is stable at room temperature, will be discussed.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | photoswitching optical bistability structural changes density-functional theory nuclear resonant methods |
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