Fast tunneling Jahn-Teller isomer of the [Mn12O 12(O2CC6H4-2-CH3) 16(H2O)4]· S single-molecule magnet

Evan M. Rumberger; Enrique Del Barco; Jon Lawrence; Stephen Hill; Andrew D. Kent; Lev N. Zakharov; Arnold L. Rheingold; David N. Hendrickson

doi:10.1016/j.poly.2005.03.126

Fast tunneling Jahn-Teller isomer of the [Mn₁₂O ₁₂(O₂CC₆H₄-2-CH₃) ₁₆(H₂O)₄]· S single-molecule magnet

Evan M. Rumberger, Enrique Del Barco, Jon Lawrence, Stephen Hill, Andrew D. Kent, Lev N. Zakharov, Arnold L. Rheingold, David N. Hendrickson

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

Abstract

The single-crystal X-ray structure of the single-molecule magnet [Mn ₁₂O₁₂(O₂CC₆H₄-2-CH ₃)₁₆(H₂O)₄]·CH ₂Cl₂·2H₂O (complex 1) is reported. Complex 1 is a new example of a "Jahn-Teller isomer", since it has two Mn(III) ions with abnormally oriented Jahn-Teller elongation axes. Complex 1 has a lower activation energy (U_eff = 29 K) for magnetization reversal relative to other reported [Mn₁₂O₁₂] type molecules (e.g., U_eff = 70 K for Mn₁₂Ac). Single-crystal low temperature magnetization measurements are reported that confirm that complex 1 is a single-molecule magnet. High-field electron paramagnetic resonance measurements were performed on a single crystal to give the spin Hamiltonian parameters.

Original language	English (US)
Pages (from-to)	2557-2561
Number of pages	5
Journal	Polyhedron
Volume	24
Issue number	16-17
DOIs	https://doi.org/10.1016/j.poly.2005.03.126
State	Published - Nov 17 2005

Keywords

Nanomagnet
Quantum tunneling of magnetization
Single-molecule magnet
Superparamagnet

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.poly.2005.03.126

Cite this

@article{08752064f1824e88ae819bf8dce543d0,

title = "Fast tunneling Jahn-Teller isomer of the [Mn12O 12(O2CC6H4-2-CH3) 16(H2O)4]· S single-molecule magnet",

abstract = "The single-crystal X-ray structure of the single-molecule magnet [Mn 12O12(O2CC6H4-2-CH 3)16(H2O)4]·CH 2Cl2·2H2O (complex 1) is reported. Complex 1 is a new example of a {"}Jahn-Teller isomer{"}, since it has two Mn(III) ions with abnormally oriented Jahn-Teller elongation axes. Complex 1 has a lower activation energy (Ueff = 29 K) for magnetization reversal relative to other reported [Mn12O12] type molecules (e.g., Ueff = 70 K for Mn12Ac). Single-crystal low temperature magnetization measurements are reported that confirm that complex 1 is a single-molecule magnet. High-field electron paramagnetic resonance measurements were performed on a single crystal to give the spin Hamiltonian parameters.",

keywords = "Nanomagnet, Quantum tunneling of magnetization, Single-molecule magnet, Superparamagnet",

author = "Rumberger, {Evan M.} and Barco, {Enrique Del} and Jon Lawrence and Stephen Hill and Kent, {Andrew D.} and Zakharov, {Lev N.} and Rheingold, {Arnold L.} and Hendrickson, {David N.}",

note = "Funding Information: This work was supported by the National Science Foundation (CHE0350615, DMR0103290 and DMR0239481). S.H. is a Cottrell scholar of the Research Corporation.",

year = "2005",

month = nov,

day = "17",

doi = "10.1016/j.poly.2005.03.126",

language = "English (US)",

volume = "24",

pages = "2557--2561",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier Ltd",

number = "16-17",

}

TY - JOUR

T1 - Fast tunneling Jahn-Teller isomer of the [Mn12O 12(O2CC6H4-2-CH3) 16(H2O)4]· S single-molecule magnet

AU - Rumberger, Evan M.

AU - Barco, Enrique Del

AU - Lawrence, Jon

AU - Hill, Stephen

AU - Kent, Andrew D.

AU - Zakharov, Lev N.

AU - Rheingold, Arnold L.

AU - Hendrickson, David N.

N1 - Funding Information: This work was supported by the National Science Foundation (CHE0350615, DMR0103290 and DMR0239481). S.H. is a Cottrell scholar of the Research Corporation.

PY - 2005/11/17

Y1 - 2005/11/17

N2 - The single-crystal X-ray structure of the single-molecule magnet [Mn 12O12(O2CC6H4-2-CH 3)16(H2O)4]·CH 2Cl2·2H2O (complex 1) is reported. Complex 1 is a new example of a "Jahn-Teller isomer", since it has two Mn(III) ions with abnormally oriented Jahn-Teller elongation axes. Complex 1 has a lower activation energy (Ueff = 29 K) for magnetization reversal relative to other reported [Mn12O12] type molecules (e.g., Ueff = 70 K for Mn12Ac). Single-crystal low temperature magnetization measurements are reported that confirm that complex 1 is a single-molecule magnet. High-field electron paramagnetic resonance measurements were performed on a single crystal to give the spin Hamiltonian parameters.

AB - The single-crystal X-ray structure of the single-molecule magnet [Mn 12O12(O2CC6H4-2-CH 3)16(H2O)4]·CH 2Cl2·2H2O (complex 1) is reported. Complex 1 is a new example of a "Jahn-Teller isomer", since it has two Mn(III) ions with abnormally oriented Jahn-Teller elongation axes. Complex 1 has a lower activation energy (Ueff = 29 K) for magnetization reversal relative to other reported [Mn12O12] type molecules (e.g., Ueff = 70 K for Mn12Ac). Single-crystal low temperature magnetization measurements are reported that confirm that complex 1 is a single-molecule magnet. High-field electron paramagnetic resonance measurements were performed on a single crystal to give the spin Hamiltonian parameters.

KW - Nanomagnet

KW - Quantum tunneling of magnetization

KW - Single-molecule magnet

KW - Superparamagnet

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