Matrix effects on the high-spin → low-spin relaxation in [M1-xFex(bpy)3](PF6)2 (M = Cd, Mn and Zn, bpy = 2,2′-bipyridine)

Sabine Schenker; Andreas Hauser; Wei Wang; I. Y. Chan

doi:10.1016/S0009-2614(98)01136-1

Matrix effects on the high-spin → low-spin relaxation in [M_1-xFe_x(bpy)₃](PF₆)₂ (M = Cd, Mn and Zn, bpy = 2,2′-bipyridine)

Sabine Schenker
, Andreas Hauser
, Wei Wang
, I. Y. Chan

University of Geneva
Brandeis University

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

Temperature-dependent laser flash photolysis experiments on the low-spin iron(II) systems [M_1-xFe_x(bpy)₃](PF₆)₂ (M = Cd, Mn and Zn, x ≈ 0.01, bpy = 2,2′-bipyridine) under external pressure are presented. Below 50 K the high-spin → low-spin relaxation is an almost temperature-independent tunnelling process. Above that temperature it tends towards a thermally activated behaviour. A change of the host from cadmium to zinc results in an increase of the low-temperature tunnelling rate constant by two orders of magnitude. An external pressure of 1 kbar accelerates the low-temperature tunnelling process by a factor of 2. [Mn_1-xFe_x(bpy)₃](PF₆)₂ and [Zn_1-xFe_x(bpy)₃](PF₆)₂ show a phase transition at ≈ 1.1 kbar, which increases the tunnelling rate by a factor of about 6.

Original language	English
Pages (from-to)	281-286
Number of pages	6
Journal	Chemical Physics Letters
Volume	297
Issue number	3-4
DOIs	https://doi.org/10.1016/S0009-2614(98)01136-1
State	Published - Nov 27 1998
Externally published	Yes

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@article{7dc2e491a87b4a40b1563be841a3d0fa,

title = "Matrix effects on the high-spin → low-spin relaxation in [M1-xFex(bpy)3](PF6)2 (M = Cd, Mn and Zn, bpy = 2,2′-bipyridine)",

abstract = "Temperature-dependent laser flash photolysis experiments on the low-spin iron(II) systems [M1-xFex(bpy)3](PF6)2 (M = Cd, Mn and Zn, x ≈ 0.01, bpy = 2,2′-bipyridine) under external pressure are presented. Below 50 K the high-spin → low-spin relaxation is an almost temperature-independent tunnelling process. Above that temperature it tends towards a thermally activated behaviour. A change of the host from cadmium to zinc results in an increase of the low-temperature tunnelling rate constant by two orders of magnitude. An external pressure of 1 kbar accelerates the low-temperature tunnelling process by a factor of 2. [Mn1-xFex(bpy)3](PF6)2 and [Zn1-xFex(bpy)3](PF6)2 show a phase transition at ≈ 1.1 kbar, which increases the tunnelling rate by a factor of about 6.",

author = "Sabine Schenker and Andreas Hauser and Wei Wang and Chan, \{I. Y.\}",

year = "1998",

month = nov,

day = "27",

doi = "10.1016/S0009-2614(98)01136-1",

language = "English",

volume = "297",

pages = "281--286",

journal = "Chemical Physics Letters",

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number = "3-4",

}

TY - JOUR

T1 - Matrix effects on the high-spin → low-spin relaxation in [M1-xFex(bpy)3](PF6)2 (M = Cd, Mn and Zn, bpy = 2,2′-bipyridine)

AU - Schenker, Sabine

AU - Hauser, Andreas

AU - Wang, Wei

AU - Chan, I. Y.

PY - 1998/11/27

Y1 - 1998/11/27

N2 - Temperature-dependent laser flash photolysis experiments on the low-spin iron(II) systems [M1-xFex(bpy)3](PF6)2 (M = Cd, Mn and Zn, x ≈ 0.01, bpy = 2,2′-bipyridine) under external pressure are presented. Below 50 K the high-spin → low-spin relaxation is an almost temperature-independent tunnelling process. Above that temperature it tends towards a thermally activated behaviour. A change of the host from cadmium to zinc results in an increase of the low-temperature tunnelling rate constant by two orders of magnitude. An external pressure of 1 kbar accelerates the low-temperature tunnelling process by a factor of 2. [Mn1-xFex(bpy)3](PF6)2 and [Zn1-xFex(bpy)3](PF6)2 show a phase transition at ≈ 1.1 kbar, which increases the tunnelling rate by a factor of about 6.

AB - Temperature-dependent laser flash photolysis experiments on the low-spin iron(II) systems [M1-xFex(bpy)3](PF6)2 (M = Cd, Mn and Zn, x ≈ 0.01, bpy = 2,2′-bipyridine) under external pressure are presented. Below 50 K the high-spin → low-spin relaxation is an almost temperature-independent tunnelling process. Above that temperature it tends towards a thermally activated behaviour. A change of the host from cadmium to zinc results in an increase of the low-temperature tunnelling rate constant by two orders of magnitude. An external pressure of 1 kbar accelerates the low-temperature tunnelling process by a factor of 2. [Mn1-xFex(bpy)3](PF6)2 and [Zn1-xFex(bpy)3](PF6)2 show a phase transition at ≈ 1.1 kbar, which increases the tunnelling rate by a factor of about 6.

UR - https://www.scopus.com/pages/publications/0002196101

U2 - 10.1016/S0009-2614(98)01136-1

DO - 10.1016/S0009-2614(98)01136-1

M3 - Article

AN - SCOPUS:0002196101

SN - 0009-2614

VL - 297

SP - 281

EP - 286

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 3-4

ER -

Matrix effects on the high-spin → low-spin relaxation in [M_1-xFe_x(bpy)₃](PF₆)₂ (M = Cd, Mn and Zn, bpy = 2,2′-bipyridine)

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