The lattice dynamics of the Fe(tpa) (NCS)2 complex : light-induced excited spin state trapping effect |
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Authors: | Z Yu Y F Hsia X Z You H Spiering P Gutlich |
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Affiliation: | (1) Coordination Chemistry Institute, 210093 Nanjing, People's Republic of China;(2) Physics Department, Nanjing University, 210093 Nanjing, People's Republic of China;(3) Institut fur Anorganische Chemie, Universitat Mainz, D-55099, Germany |
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Abstract: | A light-induced excited spin state trapping (LIESST) experiment for a thermal gradual spin crossover complex, Fetris (2-pyridylmethyl)
amine(NCS)2 or Fe(tpa) (NCS)2, was attempted for the first time. The high spin (HS) state after light inducement stayed metastable
over a period of days without relaxation at 10 K. Intersystem relaxation from a high to a low spin (LS) complex occurred at
50 K after bleaching at 10 K. Investigation of the Mossbauer spectra of the LIESST and relaxation experiment indicated that
the Debye–Waller factor was a correlation parameter of the HS fraction and that the co-operative effect played a role in the
relaxation process for such a solid compound.
This revised version was published online in November 2006 with corrections to the Cover Date. |
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