Slow magnetic relaxation in mixed-valence coordination polymer, containing Co(III) cluster and Co(II) nodes

Zhu, Jing-Yan; Liu, Baolin; Zhang, Weibing; Jiang, Jun; Li, Xinhua

doi:10.1016/j.molstruc.2021.129934

Cited by 4 publications

(2 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fitted peaks can be attributed to Co 3+ and Co 2+ , implying the existence of cobalt centers with different oxidation states ( Figure S3 ). 65 , 66 The integrated area of Co 3+ peaks is close to that of Co 2+ , indicating that the Co(II)/Co(III) ratio in the crystal lattice is nearly 1:1. The asymmetric unit of this coordination polymer ( Figure 5 ) contains two distinct Co(II) and Co(III) atoms (Co1, Co2), one μ 3 -pdba 2– linker, two μ-Hbiim – linkers, and one terminal Hbiim – moiety.…”

Section: Resultsmentioning

confidence: 85%

“…The fitted peaks can be attributed to Co 3+ and Co 2+ , implying the existence of cobalt centers with different oxidation states (Figure S3). 65,66 The integrated area of Co 3+ peaks is close to 5b). Topologically, the 2D layer is composed of the 5linked Co1 and 2-linked Co2 centers, the 3-connected μ 3pdba 2− nodes, and the 2-linked μ-Hbiim − ligands (Figure 5c).…”

Section: [Co(μ 3 -Pdba)(phen)]•2h 2 O} N (2) and {[Ni(μ 3 -Pdba)-(phe...mentioning

confidence: 74%

See 1 more Smart Citation

Coordination Polymers Constructed from an Adaptable Pyridine-Dicarboxylic Acid Linker: Assembly, Diversity of Structures, and Catalysis

et al. 2022

View full text Add to dashboard Cite

4,4′-(Pyridine-3,5-diyl)dibenzoic acid (H2pdba) was explored as an adaptable linker for assembling a diversity of new manganese(II), cobalt(II/III), nickel(II), and copper(II) coordination polymers (CPs): [Mn(μ4-pdba)(H2O)] n (1), {[M(μ3-pdba)(phen)]·2H2O} n (M = Co (2), Ni (3)), {[Cu2(μ3-pdba)2(bipy)]·2H2O} n (4), {[Co(μ3-pdba)(bipy)]·2H2O} n (5), [Co2(μ3-pdba)(μ-Hbiim)2(Hbiim)] n (6), and [M(μ4-pdba)(py)] n (M = Co (7), Ni (8)). The CPs were hydrothermally synthesized using metal(II) chloride precursors, H2pdba, and different coligands functioning as crystallization mediators (phen: 1,10-phenanthroline; bipy: 2,2′-bipyridine, H2biim: 2,2′-biimidazole; py: pyridine). Structural networks of 1–8 range from two-dimensional (2D) metal–organic layers (1–3, 5–8) to three-dimensional (3D) metal–organic framework (MOF) (4) and disclose several types of topologies: sql (in 1), hcb (in 2, 3, 5), tfk (in 4), 3,5L66 (in 6), and SP 2-periodic net (6,3)Ia (in 7, 8). Apart from the characterization by standard methods, catalytic potential of the obtained CPs was also screened in the Knoevenagel condensation of benzaldehyde with propanedinitrile to give 2-benzylidenemalononitrile (model reaction). Several reaction parameters were optimized, and the substrate scope was explored, revealing the best catalytic performance for a 3D MOF 4. This catalyst is recyclable and can lead to substituted dinitrile products in up to 99% product yields. The present study widens the use of H2pdba as a still poorly studied linker toward designing novel functional coordination polymers.

show abstract

Section: Resultsmentioning

confidence: 85%

“…The fitted peaks can be attributed to Co 3+ and Co 2+ , implying the existence of cobalt centers with different oxidation states (Figure S3). 65,66 The integrated area of Co 3+ peaks is close to 5b). Topologically, the 2D layer is composed of the 5linked Co1 and 2-linked Co2 centers, the 3-connected μ 3pdba 2− nodes, and the 2-linked μ-Hbiim − ligands (Figure 5c).…”

Section: [Co(μ 3 -Pdba)(phen)]•2h 2 O} N (2) and {[Ni(μ 3 -Pdba)-(phe...mentioning

confidence: 74%