[Fe(μ-btzmp)2(btzmp)2](ClO4)2: a doubly-bridged 1D spin-transition bistetrazole-based polymer showing thermal hysteresis behaviour

Manuel Quesada; Huub Kooijman; Patrick Gamez; José Sánchez Costa; Petra J. van Koningsbruggen; Peter Weinberger; Michael Reissner; Anthony L. Spek; Jaap G. Haasnoot; Jan Reedijk

doi:10.1039/b709460d

[Fe(μ-btzmp)₂(btzmp)₂](ClO₄)₂: a doubly-bridged 1D spin-transition bistetrazole-based polymer showing thermal hysteresis behaviour

Manuel Quesada
, Huub Kooijman
, Patrick Gamez
, José Sánchez Costa
, Petra J. van Koningsbruggen
, Peter Weinberger
, Michael Reissner
, Anthony L. Spek
, Jaap G. Haasnoot
, Jan Reedijk

Chemical Engineering & Applied Chemistry

Rijksuniversiteit Groningen
Universiteit Utrecht
Technische Universität Wien
Universiteit Leiden

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

50 Citations (SciVal)

Abstract

The reaction of btzmp (1,2-bis(tetrazol-1-yl)-2-methylpropane) with Fe(ClO₄)₂ generates a 1D polymeric species, [Fe(μ-btzmp)₂(btzmp)₂](ClO₄)₂, showing a steep spin transition (T_½↑ = 136 K and T _½↓ = 133 K) with a 3 K thermal hysteresis. The crystal structure at 100 and 200 K reveals that, in contrast to other bistetrazole based spin-transition systems such as [Fe(endi)₃](BF₄)₂ and [Fe(btzp)₃](ClO₄)₂, the present compound has only two ligands bridging the metallic centres, while the other two coordination positions are occupied by two mono-coordinated (non-bridging) btzmp ligands. This peculiarity confers an unprecedented crystal packing in the series of 1D bistetrazole based polymers. The change in spin state is accompanied by an order/disorder transition of the ClO₄^- counterion. A careful examination of the structural changes occurring upon the spin transition indicates that this order/disorder is most likely affected by the modification of the [tetrazole-centroid]-N_D-Fe angle (which is typical of bistetrazole spin-transition materials). Apart from X-ray analysis, also magnetic susceptibility, Mössbauer and UV-vis spectroscopies have been used to characterise the HS and the LS states of [Fe(µ-btzmp)₂(btzmp)₂](ClO₄)₂.

Original language	English
Pages (from-to)	5434-5440
Number of pages	7
Journal	Dalton Transactions
Issue number	46
Early online date	4 Oct 2007
DOIs	https://doi.org/10.1039/b709460d
Publication status	Published - 4 Oct 2007

Keywords

ClO4
bistetrazole
thermal hysteresis
spin-transition

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10.1039/b709460d

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Quesada, M., Kooijman, H., Gamez, P., Sánchez Costa, J., van Koningsbruggen, P. J., Weinberger, P., Reissner, M., Spek, A. L., Haasnoot, J. G., & Reedijk, J. (2007). [Fe(μ-btzmp)₂(btzmp)₂](ClO₄)₂: a doubly-bridged 1D spin-transition bistetrazole-based polymer showing thermal hysteresis behaviour. Dalton Transactions, (46), 5434-5440. https://doi.org/10.1039/b709460d

@article{4314d9b7a6924a8687e722bb252e60df,

title = "[Fe(μ-btzmp)2(btzmp)2](ClO4)2: a doubly-bridged 1D spin-transition bistetrazole-based polymer showing thermal hysteresis behaviour",

abstract = "The reaction of btzmp (1,2-bis(tetrazol-1-yl)-2-methylpropane) with Fe(ClO4)2 generates a 1D polymeric species, [Fe(μ-btzmp)2(btzmp)2](ClO4)2, showing a steep spin transition (T½↑ = 136 K and T ½↓ = 133 K) with a 3 K thermal hysteresis. The crystal structure at 100 and 200 K reveals that, in contrast to other bistetrazole based spin-transition systems such as [Fe(endi)3](BF4)2 and [Fe(btzp)3](ClO4)2, the present compound has only two ligands bridging the metallic centres, while the other two coordination positions are occupied by two mono-coordinated (non-bridging) btzmp ligands. This peculiarity confers an unprecedented crystal packing in the series of 1D bistetrazole based polymers. The change in spin state is accompanied by an order/disorder transition of the ClO4- counterion. A careful examination of the structural changes occurring upon the spin transition indicates that this order/disorder is most likely affected by the modification of the [tetrazole-centroid]-ND-Fe angle (which is typical of bistetrazole spin-transition materials). Apart from X-ray analysis, also magnetic susceptibility, M{\"o}ssbauer and UV-vis spectroscopies have been used to characterise the HS and the LS states of [Fe(µ-btzmp)2(btzmp)2](ClO4)2.",

keywords = "ClO4, bistetrazole, thermal hysteresis, spin-transition",

author = "Manuel Quesada and Huub Kooijman and Patrick Gamez and \{S{\'a}nchez Costa\}, Jos{\'e} and \{van Koningsbruggen\}, \{Petra J.\} and Peter Weinberger and Michael Reissner and Spek, \{Anthony L.\} and Haasnoot, \{Jaap G.\} and Jan Reedijk",

year = "2007",

month = oct,

day = "4",

doi = "10.1039/b709460d",

language = "English",

pages = "5434--5440",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

number = "46",

}

TY - JOUR

T1 - [Fe(μ-btzmp)2(btzmp)2](ClO4)2

T2 - a doubly-bridged 1D spin-transition bistetrazole-based polymer showing thermal hysteresis behaviour

AU - Quesada, Manuel

AU - Kooijman, Huub

AU - Gamez, Patrick

AU - Sánchez Costa, José

AU - van Koningsbruggen, Petra J.

AU - Weinberger, Peter

AU - Reissner, Michael

AU - Spek, Anthony L.

AU - Haasnoot, Jaap G.

AU - Reedijk, Jan

PY - 2007/10/4

Y1 - 2007/10/4

N2 - The reaction of btzmp (1,2-bis(tetrazol-1-yl)-2-methylpropane) with Fe(ClO4)2 generates a 1D polymeric species, [Fe(μ-btzmp)2(btzmp)2](ClO4)2, showing a steep spin transition (T½↑ = 136 K and T ½↓ = 133 K) with a 3 K thermal hysteresis. The crystal structure at 100 and 200 K reveals that, in contrast to other bistetrazole based spin-transition systems such as [Fe(endi)3](BF4)2 and [Fe(btzp)3](ClO4)2, the present compound has only two ligands bridging the metallic centres, while the other two coordination positions are occupied by two mono-coordinated (non-bridging) btzmp ligands. This peculiarity confers an unprecedented crystal packing in the series of 1D bistetrazole based polymers. The change in spin state is accompanied by an order/disorder transition of the ClO4- counterion. A careful examination of the structural changes occurring upon the spin transition indicates that this order/disorder is most likely affected by the modification of the [tetrazole-centroid]-ND-Fe angle (which is typical of bistetrazole spin-transition materials). Apart from X-ray analysis, also magnetic susceptibility, Mössbauer and UV-vis spectroscopies have been used to characterise the HS and the LS states of [Fe(µ-btzmp)2(btzmp)2](ClO4)2.

AB - The reaction of btzmp (1,2-bis(tetrazol-1-yl)-2-methylpropane) with Fe(ClO4)2 generates a 1D polymeric species, [Fe(μ-btzmp)2(btzmp)2](ClO4)2, showing a steep spin transition (T½↑ = 136 K and T ½↓ = 133 K) with a 3 K thermal hysteresis. The crystal structure at 100 and 200 K reveals that, in contrast to other bistetrazole based spin-transition systems such as [Fe(endi)3](BF4)2 and [Fe(btzp)3](ClO4)2, the present compound has only two ligands bridging the metallic centres, while the other two coordination positions are occupied by two mono-coordinated (non-bridging) btzmp ligands. This peculiarity confers an unprecedented crystal packing in the series of 1D bistetrazole based polymers. The change in spin state is accompanied by an order/disorder transition of the ClO4- counterion. A careful examination of the structural changes occurring upon the spin transition indicates that this order/disorder is most likely affected by the modification of the [tetrazole-centroid]-ND-Fe angle (which is typical of bistetrazole spin-transition materials). Apart from X-ray analysis, also magnetic susceptibility, Mössbauer and UV-vis spectroscopies have been used to characterise the HS and the LS states of [Fe(µ-btzmp)2(btzmp)2](ClO4)2.

KW - ClO4

KW - bistetrazole

KW - thermal hysteresis

KW - spin-transition

UR - https://www.scopus.com/pages/publications/36248963142

UR - http://pubs.rsc.org/en/Content/ArticleLanding/2007/DT/b709460d#!divAbstract

U2 - 10.1039/b709460d

DO - 10.1039/b709460d

M3 - Article

AN - SCOPUS:36248963142

SN - 1477-9226

SP - 5434

EP - 5440

JO - Dalton Transactions

JF - Dalton Transactions

IS - 46

ER -

[Fe(μ-btzmp)₂(btzmp)₂](ClO₄)₂: a doubly-bridged 1D spin-transition bistetrazole-based polymer showing thermal hysteresis behaviour

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