Effects of metal dilution on the spin-crossover behavior and light induced bistability of iron(II) in [Fe_xNi_1−x(bpp)₂](NCSe)₂

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• 作者：Ché ; rif Baldé ; ^a ; ^b ; ^c ; ^{cbalde@univ-zig.sn} ; Cé ; dric Desplanches^b ; ^c ; Jean Franç ; ois Lé ; tard^b ; ^c ; Guillaume Chastanet^b ; ^c ; ^{guillaume.chastanet@icmcb.cnrs.fr}
• 关键词：Spin crossover (SCO) ; Dilution effects ; Metal-coordination chemistry ; LIESST ; Iron
• 刊名：Polyhedron
• 出版年：2017
• 出版时间：17 February 2017
• 年：2017
• 卷：123
• 期：Complete
• 页码：138-144
• 全文大小：1358 K
• 卷排序：123

文摘

In this paper, we discuss the effects of metal dilution on the spin-crossover behavior of iron(II) solid solutions [FexNi1−x(bpp)2](NCSe)2 (bpp = 2,6-bis(pyrazol-3-yl)pyridine), including chemical synthesis, physical properties and light induced bistability aspects. For all the materials investigated, the thermal spin-crossover properties, T1/2, were measured and the stability of the photoinduced high-spin states was probed through determination of the T(LIESST) values associated with the light-induced excited spin-state trapping (LIESST) effect. It was found that T1/2 decreases with the metal dilution while T(LIESST) remains globally unchanged. These results were discussed and compared with previous results obtained in the same series with Zn(II) and Mn(II) used to substitute Fe(II). This comparison gives insights on the effect of the diluting ion size on the [T(LIESST), T1/2] temperatures.