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The HS → LS relaxation under external pressure in the Fe(II) spin-crossover system [Zn1−xFex(ptz)6](BF4)2(ptz = 1-propyltetrazole, x = 0.1)

✍ Scribed by Jelena Jeftić; Andreas Hauser

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
373 KB
Volume
248
Category
Article
ISSN
0009-2614

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✦ Synopsis

At low temperatures an external pressure of 1 kbar accelerates the high-spin ~ low-spin relaxation in the Znl_xFex(ptz)6 2, x = 0.1, spin-crossover system by one order of magnitude. This is due to the large difference in 0 3 volume between the high-spin and low-spin states of 26 A/molecule. The relative vertical and horizontal shifts of the potential wells of the two states as a function of pressure are estimated to be 130 cm-]/kbar and 10 _3 A/kbar, respectively.

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Fe(ptz)6(BF4)2 (ptz = I-propyltetrazole) is an iron(H) spin-crossover system which shows light-Induced excited spin state trapping. In this paper we show that (a) the same phenomenon can also be observed in Zn, \_ rFeX(ptz)6(BF4)2 (x = 0.1) and is therefore basically a single-ion property, and (b) t