HIGH-SPIN-]LOW-SPIN RELAXATION KINETICS AND COOPERATIVE EFFECTS IN THE [FE(1-PROPYLTETRAZOLE)6](BF4)2 AND [ZN1-XFEX(1-PROPYLTETRAZOLE)6](BF4)2 SPIN-CROSSOVER SYSTEMS
HIGH-SPIN-]LOW-SPIN RELAXATION KINETICS AND COOPERATIVE EFFECTS IN THE [FE(1-PROPYLTETRAZOLE)6](BF4)2 AND [ZN1-XFEX(1-PROPYLTETRAZOLE)6](BF4)2 SPIN-CROSSOVER SYSTEMS
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DOI：
10.1021/ic00243a036
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发表时间：
1986-11-05
影响因子：
4.6
通讯作者：
SPIERING, H
中科院分区：
文献类型：
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作者：
HAUSER, A;GUTLICH, P;SPIERING, H
[Fe（ptz）6]（BF 4）2（ptz= 1-丙基四唑）和混晶[Zn 1-xFe，（ptz）6]（BF 4）2是Fe（II）自旋交叉化合物，表现出光诱导的自旋激发态俘获。结果表明：（a）当x< 0.1时，（A_6 fHL = 510（12）cm ~（-1）2，A_6 fHL = 5.1（2）cm ~（-1）/K，T= 100 K）和从高自旋激发态的弛豫（Ea= 810（30）cm-1，A~ 105/s）是合适的，并且（B）对于0.2< x< 1，在从高自旋态的弛豫中观察到的合作效应是长程性质的，因此是弹性的而不是电子起源的。
[Fe (ptz) 6](BF4) 2 (ptz= 1-propyltetrazole) and the mixed crystals [Zn1_xFe,(ptz) 6](BF4) 2 are Fe (II) spin-crossover compounds that exhibit light-induced excited-spin-state trapping. It is shown that (a) for x< 0.1 a single-ion treatment of both the spin equilibrium (A6fHL= 510 (12) cm'1 2, ASHL= 5.1 (2) cnr'/K at T= 100 K) and the relaxationfrom the excited high-spin state (Ea= 810 (30) cm" 1, A~ 105/s) is appropriate and (b) for 0.2< x< 1 cooperative effects observed in the relaxation from the high-spin state are of long-range nature and therefore of elastic rather than of electronic origin.