Homochiral Dy2 Schiff Base Complexes Based on (R)/(S)-Chlocyphos: Single-Molecule Magnet Behaviours, Proton Conductivities and MCD Effects

Cai Ming Liu; Hua Hong Zou; Yi Quan Zhang; Xiang Hao; Xiao Ming Ren

doi:10.1002/cjoc.202401318

Homochiral Dy₂ Schiff Base Complexes Based on (R)/(S)-Chlocyphos: Single-Molecule Magnet Behaviours, Proton Conductivities and MCD Effects

Cai Ming Liu, Hua Hong Zou, Yi Quan Zhang, Xiang Hao, Xiao Ming Ren

School of Chemistry and Moleculai Engineering

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

1 Scopus citations

Abstract

Chiral proton conductive single-molecule magnets (SMMs) are multifunctional molecular materials that can combine conductor, magnet, and chirality at the nanoscale, but there are still significant challenges to their synthesis. Herein, the hydrazone Schiff base ligand (E)-N′-(2-hydroxybenzylidene)-3-aminopyrazine-2-carbohydrazide (H₂L_Schiff) and the homochiral ligands (R)-(+)-chlocyphos/ (S)-(−)-chlocyphos (R-HL)/(S-HL) were chosen to assemble a pair of Dy₂ enantiomers [Dy₂(R-L)₂(L_Schiff)₂(DMA)₂]·2.5H₂O (R-1) (DMA = N,N-dimethylacetamide) and [Dy₂(S-L)₂(L_Schiff)₂(DMA)₂]·2.5H₂O (S-1) at room temperature. Magnetic investigation indicated that they are field-induced SMMs, with a U_eff/k value of 42.2 K at 1000 Oe, and there is ferromagnetic coupling within the molecule; these magnetic properties may be explained by the ab initio calculations. The presence of a hydrogen bonding network confers the enantiomers proton conductivities. Moreover, R-1 and S-1 show prominent magnetic circular dichroism (MCD) effects at room temperature.

Original language	English
Pages (from-to)	1051-1058
Number of pages	8
Journal	Chinese Journal of Chemistry
Volume	43
Issue number	9
DOIs	https://doi.org/10.1002/cjoc.202401318
State	Published - 1 May 2025

Keywords

Ab initio calculations
Chiral complex
Chiral phosphate
Conducting materials
Dy(III) complex
MCD spectrum
Proton conductivity
Single-molecule magnet

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title = "Homochiral Dy2 Schiff Base Complexes Based on (R)/(S)-Chlocyphos: Single-Molecule Magnet Behaviours, Proton Conductivities and MCD Effects",

abstract = "Chiral proton conductive single-molecule magnets (SMMs) are multifunctional molecular materials that can combine conductor, magnet, and chirality at the nanoscale, but there are still significant challenges to their synthesis. Herein, the hydrazone Schiff base ligand (E)-N′-(2-hydroxybenzylidene)-3-aminopyrazine-2-carbohydrazide (H2LSchiff) and the homochiral ligands (R)-(+)-chlocyphos/ (S)-(−)-chlocyphos (R-HL)/(S-HL) were chosen to assemble a pair of Dy2 enantiomers [Dy2(R-L)2(LSchiff)2(DMA)2]·2.5H2O (R-1) (DMA = N,N-dimethylacetamide) and [Dy2(S-L)2(LSchiff)2(DMA)2]·2.5H2O (S-1) at room temperature. Magnetic investigation indicated that they are field-induced SMMs, with a Ueff/k value of 42.2 K at 1000 Oe, and there is ferromagnetic coupling within the molecule; these magnetic properties may be explained by the ab initio calculations. The presence of a hydrogen bonding network confers the enantiomers proton conductivities. Moreover, R-1 and S-1 show prominent magnetic circular dichroism (MCD) effects at room temperature.",

keywords = "Ab initio calculations, Chiral complex, Chiral phosphate, Conducting materials, Dy(III) complex, MCD spectrum, Proton conductivity, Single-molecule magnet",

author = "Liu, {Cai Ming} and Zou, {Hua Hong} and Zhang, {Yi Quan} and Xiang Hao and Ren, {Xiao Ming}",

note = "Publisher Copyright: {\textcopyright} 2025 SIOC, CAS, Shanghai, & WILEY-VCH GmbH.",

year = "2025",

month = may,

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doi = "10.1002/cjoc.202401318",

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TY - JOUR

T1 - Homochiral Dy2 Schiff Base Complexes Based on (R)/(S)-Chlocyphos

T2 - Single-Molecule Magnet Behaviours, Proton Conductivities and MCD Effects

AU - Liu, Cai Ming

AU - Zou, Hua Hong

AU - Zhang, Yi Quan

AU - Hao, Xiang

AU - Ren, Xiao Ming

PY - 2025/5/1

Y1 - 2025/5/1

N2 - Chiral proton conductive single-molecule magnets (SMMs) are multifunctional molecular materials that can combine conductor, magnet, and chirality at the nanoscale, but there are still significant challenges to their synthesis. Herein, the hydrazone Schiff base ligand (E)-N′-(2-hydroxybenzylidene)-3-aminopyrazine-2-carbohydrazide (H2LSchiff) and the homochiral ligands (R)-(+)-chlocyphos/ (S)-(−)-chlocyphos (R-HL)/(S-HL) were chosen to assemble a pair of Dy2 enantiomers [Dy2(R-L)2(LSchiff)2(DMA)2]·2.5H2O (R-1) (DMA = N,N-dimethylacetamide) and [Dy2(S-L)2(LSchiff)2(DMA)2]·2.5H2O (S-1) at room temperature. Magnetic investigation indicated that they are field-induced SMMs, with a Ueff/k value of 42.2 K at 1000 Oe, and there is ferromagnetic coupling within the molecule; these magnetic properties may be explained by the ab initio calculations. The presence of a hydrogen bonding network confers the enantiomers proton conductivities. Moreover, R-1 and S-1 show prominent magnetic circular dichroism (MCD) effects at room temperature.

AB - Chiral proton conductive single-molecule magnets (SMMs) are multifunctional molecular materials that can combine conductor, magnet, and chirality at the nanoscale, but there are still significant challenges to their synthesis. Herein, the hydrazone Schiff base ligand (E)-N′-(2-hydroxybenzylidene)-3-aminopyrazine-2-carbohydrazide (H2LSchiff) and the homochiral ligands (R)-(+)-chlocyphos/ (S)-(−)-chlocyphos (R-HL)/(S-HL) were chosen to assemble a pair of Dy2 enantiomers [Dy2(R-L)2(LSchiff)2(DMA)2]·2.5H2O (R-1) (DMA = N,N-dimethylacetamide) and [Dy2(S-L)2(LSchiff)2(DMA)2]·2.5H2O (S-1) at room temperature. Magnetic investigation indicated that they are field-induced SMMs, with a Ueff/k value of 42.2 K at 1000 Oe, and there is ferromagnetic coupling within the molecule; these magnetic properties may be explained by the ab initio calculations. The presence of a hydrogen bonding network confers the enantiomers proton conductivities. Moreover, R-1 and S-1 show prominent magnetic circular dichroism (MCD) effects at room temperature.

KW - Ab initio calculations

KW - Chiral complex

KW - Chiral phosphate

KW - Conducting materials

KW - Dy(III) complex

KW - MCD spectrum

KW - Proton conductivity

KW - Single-molecule magnet

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U2 - 10.1002/cjoc.202401318

DO - 10.1002/cjoc.202401318

M3 - 文章

AN - SCOPUS:105001657980

SN - 1001-604X

VL - 43

SP - 1051

EP - 1058

JO - Chinese Journal of Chemistry

JF - Chinese Journal of Chemistry

IS - 9

ER -

Homochiral Dy₂ Schiff Base Complexes Based on (R)/(S)-Chlocyphos: Single-Molecule Magnet Behaviours, Proton Conductivities and MCD Effects

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Keywords

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