Fe(III) clusters built with tripodal alcohol ligands

L F  Jones; D M  Low; M  Helliwell; J  Raftery; D  Collison; G  Aromi; J  Cano; T  Mallah; W  Wernsdorfer; E K  Brechin; E J L  Mcinnes

doi:10.1016/j.poly.2005.08.034

Fe(III) clusters built with tripodal alcohol ligands

L F Jones, D M Low, M Helliwell, J Raftery, D Collison, G Aromi, J Cano, T Mallah, W Wernsdorfer, E K Brechin, E J L Mcinnes

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

Abstract / Description of output

Reaction of the tripodal ligand 1,1,1-tris(hydroxymethyl)ethane (H(3)thme) with a variety of Fe(III) precursors under both ambient and solvothermal conditions has led to the isolation of a number of new complexes ranging in nuclearity from 4 to 16. These include the rhomb or diamond-like clusters [Fe-4(thme)(2)Cl-4(O2CR)(2)(R'OH)(2)] (1, R = Me, R' = Et; 2, R = Ph, R' = Me; 3, R = CMe3, R' = Me); the related nonanuclear and undecanuclear clusters [Fe9O4(O2CCMe3)(13)(thme)(2)] (4) and [NEt4][Fe11O4(O2CPh)(10)(thme)(4)(dmhp)(2)Cl-4] (5) (dmhp = 4,6-dimethyl-2-hydroxypyrimidine) and the octametallic and hexadecametallic wheels [Fe-8(O2CR)12(thme)41 (6, R = Ph; 7, R = CMe3) and [Fe-16(EtO)(4)(O2CPh)(16)(Hthme)(12)](NO3)(4) (8). Magnetic studies reveal the presence of dominant antiferromagnetic interactions between the Fe centres in all eight complexes which results in the presence of small spin ground states for complexes 1-4 and 6-8. For 5 however, these stabilise an S = 11/2 spin ground state with an axial zero-field splitting parameter of D = -0.46 cm(-1). Single crystal hysteresis loops in magnetisation versus external magnetic field measurements show the temperature and sweep rate dependence indicative of single-molecule magnetism behaviour. (c) 2005 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	325-333
Number of pages	9
Journal	Polyhedron
Volume	25
Issue number	2
DOIs	https://doi.org/10.1016/j.poly.2005.08.034
Publication status	Published - 23 Jan 2006

Keywords / Materials (for Non-textual outputs)

iron
clusters
single-molecule magnets
SINGLE-MOLECULE MAGNETS
SOLVOTHERMAL SYNTHESIS
COMPLEX
ANISOTROPY
FAMILY
SPIN

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10.1016/j.poly.2005.08.034

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@article{5cfa0ae6efc6489a96243678faa2bd79,

title = "Fe(III) clusters built with tripodal alcohol ligands",

abstract = "Reaction of the tripodal ligand 1,1,1-tris(hydroxymethyl)ethane (H(3)thme) with a variety of Fe(III) precursors under both ambient and solvothermal conditions has led to the isolation of a number of new complexes ranging in nuclearity from 4 to 16. These include the rhomb or diamond-like clusters [Fe-4(thme)(2)Cl-4(O2CR)(2)(R'OH)(2)] (1, R = Me, R' = Et; 2, R = Ph, R' = Me; 3, R = CMe3, R' = Me); the related nonanuclear and undecanuclear clusters [Fe9O4(O2CCMe3)(13)(thme)(2)] (4) and [NEt4][Fe11O4(O2CPh)(10)(thme)(4)(dmhp)(2)Cl-4] (5) (dmhp = 4,6-dimethyl-2-hydroxypyrimidine) and the octametallic and hexadecametallic wheels [Fe-8(O2CR)12(thme)41 (6, R = Ph; 7, R = CMe3) and [Fe-16(EtO)(4)(O2CPh)(16)(Hthme)(12)](NO3)(4) (8). Magnetic studies reveal the presence of dominant antiferromagnetic interactions between the Fe centres in all eight complexes which results in the presence of small spin ground states for complexes 1-4 and 6-8. For 5 however, these stabilise an S = 11/2 spin ground state with an axial zero-field splitting parameter of D = -0.46 cm(-1). Single crystal hysteresis loops in magnetisation versus external magnetic field measurements show the temperature and sweep rate dependence indicative of single-molecule magnetism behaviour. (c) 2005 Elsevier Ltd. All rights reserved.",

keywords = "iron, clusters, single-molecule magnets, SINGLE-MOLECULE MAGNETS, SOLVOTHERMAL SYNTHESIS, COMPLEX, ANISOTROPY, FAMILY, SPIN",

author = "Jones, {L F} and Low, {D M} and M Helliwell and J Raftery and D Collison and G Aromi and J Cano and T Mallah and W Wernsdorfer and Brechin, {E K} and Mcinnes, {E J L}",

year = "2006",

month = jan,

day = "23",

doi = "10.1016/j.poly.2005.08.034",

language = "English",

volume = "25",

pages = "325--333",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Pergamon Press",

number = "2",

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TY - JOUR

T1 - Fe(III) clusters built with tripodal alcohol ligands

AU - Jones, L F

AU - Low, D M

AU - Helliwell, M

AU - Raftery, J

AU - Collison, D

AU - Aromi, G

AU - Cano, J

AU - Mallah, T

AU - Wernsdorfer, W

AU - Brechin, E K

AU - Mcinnes, E J L

PY - 2006/1/23

Y1 - 2006/1/23

N2 - Reaction of the tripodal ligand 1,1,1-tris(hydroxymethyl)ethane (H(3)thme) with a variety of Fe(III) precursors under both ambient and solvothermal conditions has led to the isolation of a number of new complexes ranging in nuclearity from 4 to 16. These include the rhomb or diamond-like clusters [Fe-4(thme)(2)Cl-4(O2CR)(2)(R'OH)(2)] (1, R = Me, R' = Et; 2, R = Ph, R' = Me; 3, R = CMe3, R' = Me); the related nonanuclear and undecanuclear clusters [Fe9O4(O2CCMe3)(13)(thme)(2)] (4) and [NEt4][Fe11O4(O2CPh)(10)(thme)(4)(dmhp)(2)Cl-4] (5) (dmhp = 4,6-dimethyl-2-hydroxypyrimidine) and the octametallic and hexadecametallic wheels [Fe-8(O2CR)12(thme)41 (6, R = Ph; 7, R = CMe3) and [Fe-16(EtO)(4)(O2CPh)(16)(Hthme)(12)](NO3)(4) (8). Magnetic studies reveal the presence of dominant antiferromagnetic interactions between the Fe centres in all eight complexes which results in the presence of small spin ground states for complexes 1-4 and 6-8. For 5 however, these stabilise an S = 11/2 spin ground state with an axial zero-field splitting parameter of D = -0.46 cm(-1). Single crystal hysteresis loops in magnetisation versus external magnetic field measurements show the temperature and sweep rate dependence indicative of single-molecule magnetism behaviour. (c) 2005 Elsevier Ltd. All rights reserved.

AB - Reaction of the tripodal ligand 1,1,1-tris(hydroxymethyl)ethane (H(3)thme) with a variety of Fe(III) precursors under both ambient and solvothermal conditions has led to the isolation of a number of new complexes ranging in nuclearity from 4 to 16. These include the rhomb or diamond-like clusters [Fe-4(thme)(2)Cl-4(O2CR)(2)(R'OH)(2)] (1, R = Me, R' = Et; 2, R = Ph, R' = Me; 3, R = CMe3, R' = Me); the related nonanuclear and undecanuclear clusters [Fe9O4(O2CCMe3)(13)(thme)(2)] (4) and [NEt4][Fe11O4(O2CPh)(10)(thme)(4)(dmhp)(2)Cl-4] (5) (dmhp = 4,6-dimethyl-2-hydroxypyrimidine) and the octametallic and hexadecametallic wheels [Fe-8(O2CR)12(thme)41 (6, R = Ph; 7, R = CMe3) and [Fe-16(EtO)(4)(O2CPh)(16)(Hthme)(12)](NO3)(4) (8). Magnetic studies reveal the presence of dominant antiferromagnetic interactions between the Fe centres in all eight complexes which results in the presence of small spin ground states for complexes 1-4 and 6-8. For 5 however, these stabilise an S = 11/2 spin ground state with an axial zero-field splitting parameter of D = -0.46 cm(-1). Single crystal hysteresis loops in magnetisation versus external magnetic field measurements show the temperature and sweep rate dependence indicative of single-molecule magnetism behaviour. (c) 2005 Elsevier Ltd. All rights reserved.

KW - iron

KW - clusters

KW - single-molecule magnets

KW - SINGLE-MOLECULE MAGNETS

KW - SOLVOTHERMAL SYNTHESIS

KW - COMPLEX

KW - ANISOTROPY

KW - FAMILY

KW - SPIN

U2 - 10.1016/j.poly.2005.08.034

DO - 10.1016/j.poly.2005.08.034

M3 - Article

SN - 0277-5387

VL - 25

SP - 325

EP - 333

JO - Polyhedron

JF - Polyhedron

IS - 2

ER -

Fe(III) clusters built with tripodal alcohol ligands

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

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