Synthesis, structure, and magnetic properties of heterotrimetallic tetranuclear complexes

Kong Qiu Hu; Shu Qi Wu; Ai Li Cui; Hui Zhong Kou

doi:10.1007/s11243-014-9854-5

Synthesis, structure, and magnetic properties of heterotrimetallic tetranuclear complexes

Kong Qiu Hu, Shu Qi Wu, Ai Li Cui, Hui Zhong Kou

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9 Citations (Scopus)

Abstract

Two novel heterotrimetallic tetranuclear complexes [Cu(H ₂L)(CH₃OH)]₂Gd(DMF)Fe(CN)₆· 2H₂O·DMF (1) and [Cu(H₂L)(CH₃OH)] ₂Tb(H₂O)_0.57(DMF)_0.43Fe(CN) ₆·5.5H₂O (2) are reported (H₄L = N,N-ethylenebis(3-hydroxysalicylidene)). The central Ln(III) ion is surrounded by two neutral [Cu(H₂L)(CH₃OH)] moieties, forming a Cu₂Ln trinuclear unit. The [Fe(CN)₆]^3- anion is weakly coordinated to one Cu(II) ion of [Cu(H₂L)(CH₃OH)] through a cyanide nitrogen atom with the N-Cu distance of ca. 3.2 â.. Magnetic susceptibility measurements indicate the presence of overall ferromagnetic interactions in complexes 1 and 2. The magnetic coupling constant in complex 1 is J _Cu1Gd1 = 4.54 cm^-1 and J _Cu2Gd1 = 7.97 cm^-1 based on $$ \hat{H} = - 2J-{\text{Cu1Gd1}} \hat{S}-{\text{Cu1Gd1}} - 2J-{\text{Cu2Gd1}} \hat{S}-{\text{Cu2Gd1}} $$ H ^ = - 2 J Cu1Gd1 S ^ Cu1Gd1 - 2 J Cu2Gd1 S ^ Cu2Gd1. Dynamic AC magnetic susceptibility studies reveal that complex 2 shows frequency-dependent out-of-phase signals, typical of single molecule magnet behavior. The energy barrier for complex 2 under a 2 kOe applied DC magnetic field is 13 K.

Original language	English
Pages (from-to)	713-718
Number of pages	6
Journal	Transition Metal Chemistry
Volume	39
Issue number	6
DOIs	https://doi.org/10.1007/s11243-014-9854-5
Publication status	Published - Sept 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Inorganic Chemistry
Metals and Alloys
Materials Chemistry

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10.1007/s11243-014-9854-5

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@article{cf62cda4a622475cbeb2ecbe43c85342,

title = "Synthesis, structure, and magnetic properties of heterotrimetallic tetranuclear complexes",

abstract = "Two novel heterotrimetallic tetranuclear complexes [Cu(H 2L)(CH3OH)]2Gd(DMF)Fe(CN)6· 2H2O·DMF (1) and [Cu(H2L)(CH3OH)] 2Tb(H2O)0.57(DMF)0.43Fe(CN) 6·5.5H2O (2) are reported (H4L = N,N-ethylenebis(3-hydroxysalicylidene)). The central Ln(III) ion is surrounded by two neutral [Cu(H2L)(CH3OH)] moieties, forming a Cu2Ln trinuclear unit. The [Fe(CN)6]3- anion is weakly coordinated to one Cu(II) ion of [Cu(H2L)(CH3OH)] through a cyanide nitrogen atom with the N-Cu distance of ca. 3.2 {\^a}.. Magnetic susceptibility measurements indicate the presence of overall ferromagnetic interactions in complexes 1 and 2. The magnetic coupling constant in complex 1 is J Cu1Gd1 = 4.54 cm-1 and J Cu2Gd1 = 7.97 cm-1 based on $$ \hat{H} = - 2J-{\text{Cu1Gd1}} \hat{S}-{\text{Cu1Gd1}} - 2J-{\text{Cu2Gd1}} \hat{S}-{\text{Cu2Gd1}} $$ H ^ = - 2 J Cu1Gd1 S ^ Cu1Gd1 - 2 J Cu2Gd1 S ^ Cu2Gd1. Dynamic AC magnetic susceptibility studies reveal that complex 2 shows frequency-dependent out-of-phase signals, typical of single molecule magnet behavior. The energy barrier for complex 2 under a 2 kOe applied DC magnetic field is 13 K.",

author = "Hu, {Kong Qiu} and Wu, {Shu Qi} and Cui, {Ai Li} and Kou, {Hui Zhong}",

note = "Funding Information: Acknowledgments This work was supported by 973 program (2013CB933403) and the National Natural Science Foundation of China (Project No.: 91222104 and 21171103). CCDC 961195 (1) and 961196 (2) contains the supplementary crystallographic data for this paper. The data can be obtained free of charge from the Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/ cif .",

year = "2014",

month = sep,

doi = "10.1007/s11243-014-9854-5",

language = "English",

volume = "39",

pages = "713--718",

journal = "Transition Metal Chemistry",

issn = "0340-4285",

publisher = "Springer Netherlands",

number = "6",

}

TY - JOUR

T1 - Synthesis, structure, and magnetic properties of heterotrimetallic tetranuclear complexes

AU - Hu, Kong Qiu

AU - Wu, Shu Qi

AU - Cui, Ai Li

AU - Kou, Hui Zhong

N1 - Funding Information: Acknowledgments This work was supported by 973 program (2013CB933403) and the National Natural Science Foundation of China (Project No.: 91222104 and 21171103). CCDC 961195 (1) and 961196 (2) contains the supplementary crystallographic data for this paper. The data can be obtained free of charge from the Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/ cif .

PY - 2014/9

Y1 - 2014/9

N2 - Two novel heterotrimetallic tetranuclear complexes [Cu(H 2L)(CH3OH)]2Gd(DMF)Fe(CN)6· 2H2O·DMF (1) and [Cu(H2L)(CH3OH)] 2Tb(H2O)0.57(DMF)0.43Fe(CN) 6·5.5H2O (2) are reported (H4L = N,N-ethylenebis(3-hydroxysalicylidene)). The central Ln(III) ion is surrounded by two neutral [Cu(H2L)(CH3OH)] moieties, forming a Cu2Ln trinuclear unit. The [Fe(CN)6]3- anion is weakly coordinated to one Cu(II) ion of [Cu(H2L)(CH3OH)] through a cyanide nitrogen atom with the N-Cu distance of ca. 3.2 â.. Magnetic susceptibility measurements indicate the presence of overall ferromagnetic interactions in complexes 1 and 2. The magnetic coupling constant in complex 1 is J Cu1Gd1 = 4.54 cm-1 and J Cu2Gd1 = 7.97 cm-1 based on $$ \hat{H} = - 2J-{\text{Cu1Gd1}} \hat{S}-{\text{Cu1Gd1}} - 2J-{\text{Cu2Gd1}} \hat{S}-{\text{Cu2Gd1}} $$ H ^ = - 2 J Cu1Gd1 S ^ Cu1Gd1 - 2 J Cu2Gd1 S ^ Cu2Gd1. Dynamic AC magnetic susceptibility studies reveal that complex 2 shows frequency-dependent out-of-phase signals, typical of single molecule magnet behavior. The energy barrier for complex 2 under a 2 kOe applied DC magnetic field is 13 K.

AB - Two novel heterotrimetallic tetranuclear complexes [Cu(H 2L)(CH3OH)]2Gd(DMF)Fe(CN)6· 2H2O·DMF (1) and [Cu(H2L)(CH3OH)] 2Tb(H2O)0.57(DMF)0.43Fe(CN) 6·5.5H2O (2) are reported (H4L = N,N-ethylenebis(3-hydroxysalicylidene)). The central Ln(III) ion is surrounded by two neutral [Cu(H2L)(CH3OH)] moieties, forming a Cu2Ln trinuclear unit. The [Fe(CN)6]3- anion is weakly coordinated to one Cu(II) ion of [Cu(H2L)(CH3OH)] through a cyanide nitrogen atom with the N-Cu distance of ca. 3.2 â.. Magnetic susceptibility measurements indicate the presence of overall ferromagnetic interactions in complexes 1 and 2. The magnetic coupling constant in complex 1 is J Cu1Gd1 = 4.54 cm-1 and J Cu2Gd1 = 7.97 cm-1 based on $$ \hat{H} = - 2J-{\text{Cu1Gd1}} \hat{S}-{\text{Cu1Gd1}} - 2J-{\text{Cu2Gd1}} \hat{S}-{\text{Cu2Gd1}} $$ H ^ = - 2 J Cu1Gd1 S ^ Cu1Gd1 - 2 J Cu2Gd1 S ^ Cu2Gd1. Dynamic AC magnetic susceptibility studies reveal that complex 2 shows frequency-dependent out-of-phase signals, typical of single molecule magnet behavior. The energy barrier for complex 2 under a 2 kOe applied DC magnetic field is 13 K.

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U2 - 10.1007/s11243-014-9854-5

DO - 10.1007/s11243-014-9854-5

M3 - Article

AN - SCOPUS:84929086600

SN - 0340-4285

VL - 39

SP - 713

EP - 718

JO - Transition Metal Chemistry

JF - Transition Metal Chemistry

IS - 6

ER -

Synthesis, structure, and magnetic properties of heterotrimetallic tetranuclear complexes

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