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Four-wave-mixing in the Fe (II) spin-crossover system [Zn1−xFex(ptz)6](BF4)2 (ptz = 1-propyltetrazole)

✍ Scribed by Andreas Hauser

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
535 KB
Volume
202
Category
Article
ISSN
0009-2614

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✦ Synopsis

Making use of the phenomenon of light-induced spin-crossover in the [Zn,_xFe,(ptz)6] (BF& spin-crossover system, very high diffraction efficiencies 7 can be achieved in non-degenerate four-wave-mixing. In the mixed crystal with X= 0.1 and at 76 K, i.e. at a temperature where the system is predominantly in the low-spin state, a value for 9 of 43% was obtained. This is attributed to a phase grating due to the large difference in metal&and bondlength between the low-spin ground state and the light-induced high-spin state. The rate constant for the decay of the laser-induced grating as a function of temperature is found to be exactly twice the one of the high-spin+low-spin relaxhtion, as expected for a dil& system in the absence of cooperative effects.

📜 SIMILAR VOLUMES

The HS → LS relaxation under external pr
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)
✍ Jelena Jeftić; Andreas Hauser 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 373 KB

At low temperatures an external pressure of 1 kbar accelerates the high-spin ~ low-spin relaxation in the [Znl\_xFex(ptz)6](BF4) 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.

Reversibility of light-induced excited s
Reversibility of light-induced excited spin state trapping in the Fe(ptz)6(BF4)2, and the Zn1−xFex(ptz)6(BF4)2 spin-crossover systems
✍ A. Hauser 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 438 KB

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