Construction, structures, and magnetic studies of two cobalt(ii) and nickel(ii) coordination polymers displaying bex topology

Wu, Si-Tong1; Ruan, Zhijun1; Tian, Zhengfang1; Shi, Le2; Yang, Jiong3; Shao, Dong1

2024-09-01

10.1039/d4ce00935e

CRYSTENGCOMM   影响因子和分区

1466-8033

The synthesis, structures, adsorption, and magnetic properties of two two-dimensional (2D) coordination polymers, [M(btca)(1/2)(bpe)(1/2)(H2O)(2)](n) (M = Ni2+ (1) and Co2+ (2); H(4)btca = 1,2,4,5-benzenetetracarboxylic acid; bpe = 1,2-di(4-pyridyl)ethane) constructed by mixed bipyridyl-tetracarboxylate ligands were reported. Single-crystal X-ray diffraction studies reveal the 3D hydrogen-bonded networks sustained by O-H & ctdot;O H bonds between the 2D layers. The 2D structure topology of the compounds is a new {4.62}2{42.62.82} bex topology while the 3D framework is different because of the distinct H bond interactions. Both compounds exhibit high thermal stability above 150 degrees C. N-2 adsorption measurements reveal that both compounds are non-porous structures, while compound 1 exhibits CO2 adsorption, possibly due to structural expansion after CO2 accommodation. Magnetic investigations indicated that framework 2 exhibits field-induced slow magnetic relaxation due to the large magnetic anisotropy of Co2+ ions (zero-field splitting parameter D = 42.1 cm(-1)), while framework 1 shows simple paramagnetism with a small D of -11.3 cm(-1). This work not only provides two new coordination polymers but also a potential bipyridyl-tetracarboxylate approach for the design and construction of single-ion magnet (SIM) frameworks.

SCI

英语

其他

Huanggang Normal University["2042021033","202210204"] ; Chutian Scholars Program of Hubei Province, Huanggang Normal University[T2023026] ; Science and Technology Innovation Team Plan for the Youths in Universities of Hubei Province[2023AFB010]

Chemistry ; Crystallography

Chemistry, Multidisciplinary ; Crystallography

WOS:001325181700001

ROYAL SOC CHEMISTRY

Web of Science

1.Huanggang Normal Univ, Coll Chem & Chem Engn, Hubei Key Lab Proc & Applicat Catalyt Mat, Huanggang 438000, Peoples R China
2.Zhejiang Normal Univ, Key Lab, Minist Educ Adv Catalysis Mat, Zhejiang Key Lab React Chem Solid Surfaces, Jinhua, Peoples R China
3.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China

Wu, Si-Tong,Ruan, Zhijun,Tian, Zhengfang,et al. Construction, structures, and magnetic studies of two cobalt(ii) and nickel(ii) coordination polymers displaying bex topology[J]. CRYSTENGCOMM,2024.

Wu, Si-Tong,Ruan, Zhijun,Tian, Zhengfang,Shi, Le,Yang, Jiong,&Shao, Dong.(2024).Construction, structures, and magnetic studies of two cobalt(ii) and nickel(ii) coordination polymers displaying bex topology.CRYSTENGCOMM.

Wu, Si-Tong,et al."Construction, structures, and magnetic studies of two cobalt(ii) and nickel(ii) coordination polymers displaying bex topology".CRYSTENGCOMM (2024).