Reversible valence tautomerism induced by a single-shot laser pulse in a cobalt-iron Prussian blue analog

H W Liu; K Matsuda; Z Z Gu; K Takahashi; A L Cui; R Nakajima; A Fujishima; O Sato

doi:10.1103/PhysRevLett.90.167403

Reversible valence tautomerism induced by a single-shot laser pulse in a cobalt-iron Prussian blue analog

Phys Rev Lett. 2003 Apr 25;90(16):167403. doi: 10.1103/PhysRevLett.90.167403. Epub 2003 Apr 22.

Authors

H W Liu¹, K Matsuda, Z Z Gu, K Takahashi, A L Cui, R Nakajima, A Fujishima, O Sato

Affiliation

¹ Kanagawa Academy of Science and Technology, KSP Building East 412, 3-2-1 Sakado, Takatsu-ku, Kawasaki-shi, Kanagawa 213-0012, Japan.

PMID: 12732007
DOI: 10.1103/PhysRevLett.90.167403

Abstract

Reversible valence tautomeric conversion induced by a single-shot laser pulse (8 ns duration) with a photon excitation energy of 2.38 eV has been observed in Na0.36Co1.32Fe(CN)(6).5.6H(2)O. A photoswitching process with accompanying magnetization and color changes was successfully achieved within the pulse duration at high temperature (above 200 K) in a thermal hysteresis loop. This unusual photoeffect originates from an optical charge transfer between Fe and Co atoms and evolves due to a cooperative interaction among the local photoexcited sites.