Photomagnetic Properties of an Iron(II) Low-Spin Complex with an Unusually Long-Lived Metastable LIESST State
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- 作者：José ; Sá ; nchez Costa ; Cherif Balde ; Chiara Carbonera ; Dominique Denux ; Alain Wattiaux ; Cé ; dric Desplanches ; Jean-Pierre Ader ; Philipp Gü ; tlich ; Jean-Franç ; ois Lé ; tard
- 刊名：Inorganic Chemistry
- 出版年：2007
- 出版时间：May 14, 2007
- 年：2007
- 卷：46
- 期：10
- 页码：Gütlich, and Jea
- 全文大小：146K
- 年卷期：v.46,no.10(May 14, 2007)
- ISSN：1520-510X
文摘
A comprehensive study of the photomagnetic behavior of the [Fe(L222N5)(CN)2]
H2O complex has been carried out.This complex is characterized by a low-spin (LS) iron(II)-metal center up to 400 K and exhibits at 10 K thewell-known Light-Induced Excited Spin State Trapping (LIESST) effect. The critical LIESST temperature (T(LIESST))has been measured to be 105 K. The kinetics of the transition from the metastable high-spin (HS) state to thelow-spin state have been determined and used for reproducing the experimental T(LIESST) curve. This studyrepresents a second example of a fully low-spin iron(II)-metal complex up to 400 K, which can be photoexcitedat low temperature with an atypical long-lived metastable HS state. This underlines the preponderant role of theinner coordination sphere for stabilizing the lifetime of the photoinduced HS state.
H2O complex has been carried out.This complex is characterized by a low-spin (LS) iron(II)-metal center up to 400 K and exhibits at 10 K thewell-known Light-Induced Excited Spin State Trapping (LIESST) effect. The critical LIESST temperature (T(LIESST))has been measured to be 105 K. The kinetics of the transition from the metastable high-spin (HS) state to thelow-spin state have been determined and used for reproducing the experimental T(LIESST) curve. This studyrepresents a second example of a fully low-spin iron(II)-metal complex up to 400 K, which can be photoexcitedat low temperature with an atypical long-lived metastable HS state. This underlines the preponderant role of theinner coordination sphere for stabilizing the lifetime of the photoinduced HS state.