Syntheses, crystal structures, electronic spectra and magnetic properties of two ion-pair charge transfer complexes based on [Ni(mnt)2]−

Xiao Yi Xu; Xuan Rong Chen; Qing Cheng Yang; Chen Xue; Jian Qing Tao; Jian Lan Liu; Xiao Ming Ren

doi:10.1016/j.molstruc.2016.08.052

Syntheses, crystal structures, electronic spectra and magnetic properties of two ion-pair charge transfer complexes based on [Ni(mnt)₂]⁻

Xiao Yi Xu, Xuan Rong Chen, Qing Cheng Yang, Chen Xue, Jian Qing Tao, Jian Lan Liu, Xiao Ming Ren

School of Chemistry and Moleculai Engineering

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

1 Scopus citations

Abstract

Two new bimetallic ion-pair complexes 1 and 2 with general formula [M(phen)₃][Ni(mnt)₂]₂ (phen = 1, 10-phenanthroline, mnt²⁻ = maleonitriledithiolate; M = Ni²⁺, Fe²⁺ for 1 and 2), have been prepared and characterized by IR, elemental analysis, single crystal X-ray diffraction, UV-vis-NIR spectra and magnetic measurements. The structural determination reveals that the crystals of two ion-pair complexes, with monoclinic space group C2/c, have similar cell parameters and the [M(phen)₃]²⁺ cations and the [Ni(mnt)₂]^- anions are packed by forming alternate layers. Thermogravimetric (TG) analyses revealed that 1 and 2 are thermally stable up to ∼170 °C. UV-vis-NIR spectra discloses that two complexes exhibit sizable absorption in near-IR region because of ion-pair charge transfer (IPCT) transitions in 1 and 2. Investigation of the magnetic properties 1 shows Curie-Weiss-type paramagnetic behavior in the temperature range 2–400 K. For 2, the paramagnetic behavior above ∼40 K indicated the [Fe(phen)₃]²⁺ ion has a low-spin state and the weak Curie-Weiss type tail below 40 K results from a trace amount of paramagnetic [Ni(mnt)₂]^- species.

Original language	English
Pages (from-to)	57-63
Number of pages	7
Journal	Journal of Molecular Structure
Volume	1128
DOIs	https://doi.org/10.1016/j.molstruc.2016.08.052
State	Published - 15 Jan 2017

Keywords

Bis(maleonitriledithiolate) nickelate
Crystal structure
Electronic spectra
Magnetic property

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10.1016/j.molstruc.2016.08.052

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title = "Syntheses, crystal structures, electronic spectra and magnetic properties of two ion-pair charge transfer complexes based on [Ni(mnt)2]−",

abstract = "Two new bimetallic ion-pair complexes 1 and 2 with general formula [M(phen)3][Ni(mnt)2]2 (phen = 1, 10-phenanthroline, mnt2− = maleonitriledithiolate; M = Ni2+, Fe2+ for 1 and 2), have been prepared and characterized by IR, elemental analysis, single crystal X-ray diffraction, UV-vis-NIR spectra and magnetic measurements. The structural determination reveals that the crystals of two ion-pair complexes, with monoclinic space group C2/c, have similar cell parameters and the [M(phen)3]2+ cations and the [Ni(mnt)2]- anions are packed by forming alternate layers. Thermogravimetric (TG) analyses revealed that 1 and 2 are thermally stable up to ∼170 °C. UV-vis-NIR spectra discloses that two complexes exhibit sizable absorption in near-IR region because of ion-pair charge transfer (IPCT) transitions in 1 and 2. Investigation of the magnetic properties 1 shows Curie-Weiss-type paramagnetic behavior in the temperature range 2–400 K. For 2, the paramagnetic behavior above ∼40 K indicated the [Fe(phen)3]2+ ion has a low-spin state and the weak Curie-Weiss type tail below 40 K results from a trace amount of paramagnetic [Ni(mnt)2]- species.",

keywords = "Bis(maleonitriledithiolate) nickelate, Crystal structure, Electronic spectra, Magnetic property",

author = "Xu, {Xiao Yi} and Chen, {Xuan Rong} and Yang, {Qing Cheng} and Chen Xue and Tao, {Jian Qing} and Liu, {Jian Lan} and Ren, {Xiao Ming}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

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day = "15",

doi = "10.1016/j.molstruc.2016.08.052",

language = "英语",

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pages = "57--63",

journal = "Journal of Molecular Structure",

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T1 - Syntheses, crystal structures, electronic spectra and magnetic properties of two ion-pair charge transfer complexes based on [Ni(mnt)2]−

AU - Xu, Xiao Yi

AU - Chen, Xuan Rong

AU - Yang, Qing Cheng

AU - Xue, Chen

AU - Tao, Jian Qing

AU - Liu, Jian Lan

AU - Ren, Xiao Ming

PY - 2017/1/15

Y1 - 2017/1/15

N2 - Two new bimetallic ion-pair complexes 1 and 2 with general formula [M(phen)3][Ni(mnt)2]2 (phen = 1, 10-phenanthroline, mnt2− = maleonitriledithiolate; M = Ni2+, Fe2+ for 1 and 2), have been prepared and characterized by IR, elemental analysis, single crystal X-ray diffraction, UV-vis-NIR spectra and magnetic measurements. The structural determination reveals that the crystals of two ion-pair complexes, with monoclinic space group C2/c, have similar cell parameters and the [M(phen)3]2+ cations and the [Ni(mnt)2]- anions are packed by forming alternate layers. Thermogravimetric (TG) analyses revealed that 1 and 2 are thermally stable up to ∼170 °C. UV-vis-NIR spectra discloses that two complexes exhibit sizable absorption in near-IR region because of ion-pair charge transfer (IPCT) transitions in 1 and 2. Investigation of the magnetic properties 1 shows Curie-Weiss-type paramagnetic behavior in the temperature range 2–400 K. For 2, the paramagnetic behavior above ∼40 K indicated the [Fe(phen)3]2+ ion has a low-spin state and the weak Curie-Weiss type tail below 40 K results from a trace amount of paramagnetic [Ni(mnt)2]- species.

AB - Two new bimetallic ion-pair complexes 1 and 2 with general formula [M(phen)3][Ni(mnt)2]2 (phen = 1, 10-phenanthroline, mnt2− = maleonitriledithiolate; M = Ni2+, Fe2+ for 1 and 2), have been prepared and characterized by IR, elemental analysis, single crystal X-ray diffraction, UV-vis-NIR spectra and magnetic measurements. The structural determination reveals that the crystals of two ion-pair complexes, with monoclinic space group C2/c, have similar cell parameters and the [M(phen)3]2+ cations and the [Ni(mnt)2]- anions are packed by forming alternate layers. Thermogravimetric (TG) analyses revealed that 1 and 2 are thermally stable up to ∼170 °C. UV-vis-NIR spectra discloses that two complexes exhibit sizable absorption in near-IR region because of ion-pair charge transfer (IPCT) transitions in 1 and 2. Investigation of the magnetic properties 1 shows Curie-Weiss-type paramagnetic behavior in the temperature range 2–400 K. For 2, the paramagnetic behavior above ∼40 K indicated the [Fe(phen)3]2+ ion has a low-spin state and the weak Curie-Weiss type tail below 40 K results from a trace amount of paramagnetic [Ni(mnt)2]- species.

KW - Bis(maleonitriledithiolate) nickelate

KW - Crystal structure

KW - Electronic spectra

KW - Magnetic property

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DO - 10.1016/j.molstruc.2016.08.052

M3 - 文章

AN - SCOPUS:84983670698

SN - 0022-2860

VL - 1128

SP - 57

EP - 63

JO - Journal of Molecular Structure

JF - Journal of Molecular Structure

ER -

Syntheses, crystal structures, electronic spectra and magnetic properties of two ion-pair charge transfer complexes based on [Ni(mnt)₂]⁻

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Keywords

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