Crystal structures, magnetic and dielectric features of two new isostructural one-dimensional platinum-bis-dithiolene molecular solids

Wei Hua Ning; Lu Zhai; Xiao Ming Ren

doi:10.1016/j.synthmet.2014.12.001

Crystal structures, magnetic and dielectric features of two new isostructural one-dimensional platinum-bis-dithiolene molecular solids

Wei Hua Ning, Lu Zhai, Xiao Ming Ren

School of Chemistry and Moleculai Engineering

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

5 Scopus citations

Abstract

Two new one-dimensional (1-D) molecular solids, [CH₂ = CH-BzPy][Pt(mnt)₂] (1) and [CH₂ = CH-BzPy-d₅][Pt(mnt)₂] (2) where CH₂ = CH-BzPy-d₅⁺ = 1-N-(4-vinylbenzyl) pyridinium-d₅ and mnt^2- = maleonitriledithiolate, were synthesized and characterized. A structural phase transition undergoes with T_C ≈ 335 K in the crystals of 1 and 2, which were confirmed by variable-temperature magnetic susceptibility and DSC measurements. Crystals of 1 and 2 are isostructural in both high- and low-temperature phases. Besides the strong similarity in crystal structures, they show quite analogous magnetic and dielectric features. Above T_C, the magnetic behavior is failed to follow the S = Heisenberg linear chain model; below T_C, a spin gap is opened for 1 and 2. The thermally-assisted dielectric relaxation occurs above ca. 280 K for 1 and 2, and this relaxation process is related to the dipole motion of the disordered CH₂CH groups in the cation under an ac electrical field.

Original language	English
Pages (from-to)	255-262
Number of pages	8
Journal	Synthetic Metals
Volume	199
DOIs	https://doi.org/10.1016/j.synthmet.2014.12.001
State	Published - Mar 2015

Keywords

Dielectric relaxation
One-dimensional magnetic chain
Platinum-bis-dithiolene
Spin-Peierls transition

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10.1016/j.synthmet.2014.12.001

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@article{ec6af3885a9249e781cf6c57f4a0d6ee,

title = "Crystal structures, magnetic and dielectric features of two new isostructural one-dimensional platinum-bis-dithiolene molecular solids",

abstract = "Two new one-dimensional (1-D) molecular solids, [CH2 = CH-BzPy][Pt(mnt)2] (1) and [CH2 = CH-BzPy-d5][Pt(mnt)2] (2) where CH2 = CH-BzPy-d5+ = 1-N-(4-vinylbenzyl) pyridinium-d5 and mnt2- = maleonitriledithiolate, were synthesized and characterized. A structural phase transition undergoes with TC ≈ 335 K in the crystals of 1 and 2, which were confirmed by variable-temperature magnetic susceptibility and DSC measurements. Crystals of 1 and 2 are isostructural in both high- and low-temperature phases. Besides the strong similarity in crystal structures, they show quite analogous magnetic and dielectric features. Above TC, the magnetic behavior is failed to follow the S = Heisenberg linear chain model; below TC, a spin gap is opened for 1 and 2. The thermally-assisted dielectric relaxation occurs above ca. 280 K for 1 and 2, and this relaxation process is related to the dipole motion of the disordered CH2CH groups in the cation under an ac electrical field.",

keywords = "Dielectric relaxation, One-dimensional magnetic chain, Platinum-bis-dithiolene, Spin-Peierls transition",

author = "Ning, {Wei Hua} and Lu Zhai and Ren, {Xiao Ming}",

note = "Publisher Copyright: {\textcopyright} 2014 Published by Elsevier B.V.",

year = "2015",

month = mar,

doi = "10.1016/j.synthmet.2014.12.001",

language = "英语",

volume = "199",

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TY - JOUR

T1 - Crystal structures, magnetic and dielectric features of two new isostructural one-dimensional platinum-bis-dithiolene molecular solids

AU - Ning, Wei Hua

AU - Zhai, Lu

AU - Ren, Xiao Ming

PY - 2015/3

Y1 - 2015/3

N2 - Two new one-dimensional (1-D) molecular solids, [CH2 = CH-BzPy][Pt(mnt)2] (1) and [CH2 = CH-BzPy-d5][Pt(mnt)2] (2) where CH2 = CH-BzPy-d5+ = 1-N-(4-vinylbenzyl) pyridinium-d5 and mnt2- = maleonitriledithiolate, were synthesized and characterized. A structural phase transition undergoes with TC ≈ 335 K in the crystals of 1 and 2, which were confirmed by variable-temperature magnetic susceptibility and DSC measurements. Crystals of 1 and 2 are isostructural in both high- and low-temperature phases. Besides the strong similarity in crystal structures, they show quite analogous magnetic and dielectric features. Above TC, the magnetic behavior is failed to follow the S = Heisenberg linear chain model; below TC, a spin gap is opened for 1 and 2. The thermally-assisted dielectric relaxation occurs above ca. 280 K for 1 and 2, and this relaxation process is related to the dipole motion of the disordered CH2CH groups in the cation under an ac electrical field.

AB - Two new one-dimensional (1-D) molecular solids, [CH2 = CH-BzPy][Pt(mnt)2] (1) and [CH2 = CH-BzPy-d5][Pt(mnt)2] (2) where CH2 = CH-BzPy-d5+ = 1-N-(4-vinylbenzyl) pyridinium-d5 and mnt2- = maleonitriledithiolate, were synthesized and characterized. A structural phase transition undergoes with TC ≈ 335 K in the crystals of 1 and 2, which were confirmed by variable-temperature magnetic susceptibility and DSC measurements. Crystals of 1 and 2 are isostructural in both high- and low-temperature phases. Besides the strong similarity in crystal structures, they show quite analogous magnetic and dielectric features. Above TC, the magnetic behavior is failed to follow the S = Heisenberg linear chain model; below TC, a spin gap is opened for 1 and 2. The thermally-assisted dielectric relaxation occurs above ca. 280 K for 1 and 2, and this relaxation process is related to the dipole motion of the disordered CH2CH groups in the cation under an ac electrical field.

KW - Dielectric relaxation

KW - One-dimensional magnetic chain

KW - Platinum-bis-dithiolene

KW - Spin-Peierls transition

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DO - 10.1016/j.synthmet.2014.12.001

M3 - 文章

AN - SCOPUS:84915815274

SN - 0379-6779

VL - 199

SP - 255

EP - 262

JO - Synthetic Metals

JF - Synthetic Metals

ER -

Crystal structures, magnetic and dielectric features of two new isostructural one-dimensional platinum-bis-dithiolene molecular solids

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Keywords

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