One-Dimensional CoII and NiII Helical Coordination Polymers Exhibiting Zero-Field Splitting

被引：5

作者：

Seguin, Ana Karina ^{[1
,2
]}

Cruz, Carlos ^{[1
,2
]}

Villafuerte, Katherine ^{[1
]}

Paez-Hernandez, Dayan ^{[1
,3
]}

Venegas-Yazigi, Diego ^{[2
,4
]}

Paredes-Garcia, Veronica ^{[1
,2
]}

机构：

[1] Univ Andres Bello, Dept Ciencias Quim, Santiago 8370146, Chile

[2] CEDENNA, Ctr Desarrollo Nanociencia & Nanotecnol, Santiago 9170022, Chile

[3] Univ Andres Bello, Ctr Appl Nanosci CANS, Santiago 8370146, Chile

[4] Univ Santiago Chile, Dept Quim Mat, Santiago 9170022, Chile

来源：

CRYSTAL GROWTH & DESIGN | 2023年 / 23卷 / 01期

关键词：

BASE LIGANDS SYNTHESIS; CRYSTAL-STRUCTURES; MAGNETIC-PROPERTIES; SLOW RELAXATION; COBALT(II); COMPLEXES; NICKEL(II);

D O I：

10.1021/acs.cgd.2c00728

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two new coordination polymers {[MII(HL)(EtOH)2]-(ClO4)}n, where MII= Co (1) and Ni (2), were synthesized using a Schiff base ligand H2L = 2-{[(E)-1H-imidazol-4-ylmethylidene}amino]benzoic acid. Compounds 1 and 2 are isostructural, presenting a one-dimensional helical chain arrangement. Each metal center has a distorted octahedral geometry bridged by a syn-anti carboxylate group. The fitting of the magnetic susceptibility data in the 1.8-300 K range shows weak intrachain antiferromagnetic interaction for 1 and weak ferromagnetic interaction for 2, with the presence of zero-field splitting (zfs) phenomenon in both compounds. Theoretical calculations confirm the weak intrachain coupling in both compounds, but with a zfs phenomenon dominant at lower temperatures. A positive value for the zfs is also obtained, with a major spin-orbit coupling component.

引用

页码：77 / 86

页数：10

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