共 47 条
Multimetastability in a Spin-Crossover Compound Leading to Different High-Spin-to-Low-Spin Relaxation Dynamics
被引:25
作者:

Craig, Gavin A.
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机构:
Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain

Sanchez Costa, Jose
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机构:
Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain

Teat, Simon J.
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机构:
Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain

Roubeau, Olivier
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h-index: 0
机构:
CSIC, ICMA, E-50009 Zaragoza, Spain Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain

Yufit, Dmitry S.
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h-index: 0
机构:
Univ Durham, Dept Chem, Durham DH1 3LE, England Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain

Howard, Judith A. K.
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机构:
Univ Durham, Dept Chem, Durham DH1 3LE, England Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain

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机构:
[1] Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain
[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA
[3] CSIC, ICMA, E-50009 Zaragoza, Spain
[4] Univ Durham, Dept Chem, Durham DH1 3LE, England
关键词:
FE(II) COORDINATION-COMPOUNDS;
WIDE THERMAL HYSTERESIS;
IRON(II) COMPLEX;
STATE;
TRANSITION;
TEMPERATURE;
SYSTEM;
LIGAND;
L=2,6-DI(PYRAZOL-1-YL)PYRIDINE;
PHOTOMAGNETISM;
D O I:
10.1021/ic400776x
中图分类号:
O61 [无机化学];
学科分类号:
070301 ;
081704 ;
摘要:
The relaxation kinetics of both the thermally trapped and photoinduced high-spin (HS) states of the spin-crossover compound [Fe(H4L)(2)](ClO4)(2)center dot H2O center dot 2(CH3)(2)CO (1) were measured and found to differ significantly. Calorimetry measurements then demonstrated that relaxation of the thermally trapped phase was concurrent with two separate processes, not previously detected as such. Determination of the photogenerated HS structure revealed a new metastable HS state of the system, much closer structurally to the low-spin phase than the thermally trapped one. This difference is proposed as the root of the disparate kinetic behavior, which is proposed to require two processes in the case of the structurally more complex thermally trapped state. Therefore, light irradiation is shown as a mechanism to decouple effectively the structural and magnetic phase transitions that occur in I during the course of its spin crossover.
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页码:7203 / 7209
页数:7
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