Solvent-induced formation of two gadolinium clusters demonstrating strong magnetocaloric effects and ferroelectric properties

被引：22

作者：

Wang, Yu-Xia ^{[1
]}

Xu, Qiutong ^{[1
]}

Ren, Peng ^{[2
]}

Shi, Wei ^{[1
]}

Cheng, Peng ^{[1
]}

机构：

[1] Nankai Univ, Coll Chem, Dept Chem, Key Lab Adv Energy Mat Chem MOE, Tianjin 300071, Peoples R China

[2] Harbin Inst Technol Shenzhen, Sch Sci, Shenzhen 518055, Peoples R China

来源：

DALTON TRANSACTIONS | 2019年 / 48卷 / 06期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

METAL-ORGANIC FRAMEWORK; MAGNETIC-FIELD; TRANSITION; COMPLEXES; DESIGN; RELAXATION; POLYMERS; BEHAVIOR; COOLERS; CAGES;

D O I：

10.1039/c8dt04267e

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two gadolinium clusters, [Gd-2(H3L)(2)(NO3)(2)](NO3)(2) (1) and [Gd-3(HL)(H2L)(NO3)(4)]center dot C2H5OH (2) (H4L = N,N,N', N'-tetrakis(2-hydroxyethyl) ethylenediamine), were synthesized and characterized with different solvents. The magnetic properties of 1 and 2 were recorded and studied in detail. 1 is a centrosymmetric binuclear Gd-2 cluster, adopting a P (1) over bar space group (point group (1) over bar), and exhibits a strong magnetocaloric effect (MCE) entropy with -Delta S-m of 27.50 J kg(-1) K-1. 2 crystallizes in the Pna2(1) space group (polar point group mm2) through solvent modulation and contains an asymmetric trinuclear Gd-3 cluster. Magnetic and ferroelectric investigations of 2 reveal a large change in the magnetocaloric effect entropy with -Delta S-m of 30.22 J kg(-1) K-1, ferroelectric hysteresis and dielectric anomalies.

引用

页码：2228 / 2233

页数：6