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(a) On-off optical switching of the density of the high-spin species measured at . The gray horizontal bar represents the on-off action of the excitation light at . (b) Excitation power density dependence of in the “on phase” at .
X-ray powder diffraction patterns of at under photoexcitation (: black curve) and without photoexcitation (gray curve).
(a) Cell volume of at against excitation power density . Closed and open circles stand for the LS phase and the on phase, respectively. (b) Mass fraction of the on phase against . A broken straight line is merely the guide for the eyes.
(Color) (a) Ball and stick picture of the molecule. Isodensity surface contour of the molecule in (b) the LS phase at , (c) the on phase at , and (d) the HS phase at , determined by the MEM/Rietveld analysis.
Geometry of the octahedron of . (, 2, and 3) is the bond distance. ∑ is defined by the sum of the absolute values of the deviation from 90° of the 12 cis angles of the octahedron. and are the cell volume and the volume of the octahedron, respectively. These values were determined by the Rietveld analysis of the x-ray powder diffraction patterns. and atoms are located on 1,10-phenanthroline, while are on ion.
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