Syntheses, structures and magnetic properties of nine coordination polymers based on terphenyl-tetracarboxylic acid ligands

2017 ◽  
Vol 46 (2) ◽  
pp. 430-444 ◽  
Author(s):  
Xinhui Zhou ◽  
Qianqian Chen ◽  
Baolin Liu ◽  
Liang Li ◽  
Tao Yang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Metal Carboxylate ◽  
Tetracarboxylic Acid ◽  
Ferromagnetic Interactions ◽  
Weak Ferromagnetic

Nine coordination polymers based on dinuclear metal units/metal-carboxylate chains and 1,1′:4′,1′′-terphenyl-2′,4,4′′,5′-tetracarboxylic acid have been synthesized and structurally characterized. Complexes 2 and 9 show the weak ferromagnetic interactions.

A series of anionic host coordination polymers based on azoxybenzene carboxylate: structures, luminescence and magnetic properties

2017 ◽  
Vol 46 (41) ◽  
pp. 14192-14200 ◽  
Author(s):  
Xun Feng ◽  
Nan Guo ◽  
Haipeng Chen ◽  
Helin Wang ◽  
Lingyun Yue ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Tetracarboxylic Acid

Series of luminescent or magnetic coordination polymers based on azoxybenzene tetracarboxylic acid and bipyridine have been afforded, and characterized systematically.

Structural diversity and magnetic properties of Co(ii)/Mn(ii)/Ni(ii) coordination polymers constructed from an unsymmetrical tetracarboxylic acid and varying N-donor ligands

CrystEngComm ◽  
2018 ◽  
Vol 20 (30) ◽  
pp. 4258-4267 ◽  
Author(s):  
Qi Yue ◽  
Xu Liu ◽  
Wei-Xiao Guo ◽  
En-Qing Gao
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Structural Diversity ◽  
Donor Ligands ◽  
Tetracarboxylic Acid ◽  
Prepared Complex ◽  
Strong Ferromagnetism

Seven coordination polymers with diverse structures based on an unsymmetrical tetracarboxylate and varying N-donor ligands were prepared. Complex 7 exhibits strong ferromagnetism.

Magnetic properties and luminescence sensing of five coordination polymers based on a rigid terphenyl-tetracarboxylic acid

CrystEngComm ◽  
2017 ◽  
Vol 19 (44) ◽  
pp. 6651-6659 ◽  
Author(s):  
Ling-Ling Gao ◽  
Qian-Nan Zhao ◽  
Miao-Miao Li ◽  
Li-Ming Fan ◽  
Xiao-Yan Niu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Organic Molecules ◽  
Variable Temperature ◽  
Tetracarboxylic Acid ◽  
Small Organic Molecules ◽  
Magnetic Susceptibilities

Five terphenyl-tetracarboxylic acid based on CPs with variable-temperature magnetic susceptibilities and luminescence sensing of small organic molecules.

How Plausible Is Getting Ferromagnetic Interactions by Coupling Blatter’s Radical via Its Fused Benzene Ring?

2020 ◽  
Author(s):  
Rishu Khurana ◽  
Ashima Bajaj ◽  
Md. Ehesan Ali
Keyword(s):  
Magnetic Properties ◽  
Wave Function ◽  
Exchange Interaction ◽  
Benzene Ring ◽  
Steric Hindrance ◽  
Exchange Interactions ◽  
Ferromagnetic Interactions ◽  
Weak Ferromagnetic

In an effort to obtain superior magnetic properties, all the possible isomers of di-Blatter diradical coupled through its fused benzene ring are investigated employing numerous density and wave function-based<i> </i>methods. It reveals that the energetically stable and also experimentally reported diradicals are anti-ferromagnetic in nature due to dominant coexisting exchange interactions between the strongly localized micro-magnetic radical centers. However, due to strong steric hindrance in certain cases, the exchange interaction switches from anti-ferromagnetic to weak ferromagnetic interactions. Moreover, we propose the modified version of <i>spin alternation</i> rule, called here as <i>zonal spin alternation</i> rule, which can be applied successfully to predict exchange interactions in such diradicals.<br>

Structural diversity and magnetic properties of six metal–organic coordination polymers based on semi-rigid V-shape tetracarboxylic acid ligand

2016 ◽  
Vol 1109 ◽  
pp. 161-170 ◽  
Author(s):  
Shanshan Yang ◽  
Yue-Ling Bai ◽  
Feifei Xing ◽  
Yongmei Zhao ◽  
Ming-Xing Li ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Structural Diversity ◽  
Tetracarboxylic Acid ◽  
Acid Ligand ◽  
Metal Organic

Metal–organic frameworks based on the [1,1′:3′,1′′-terphenyl]-3,3′′,5,5′′-tetracarboxylic acid ligand: syntheses, structures and magnetic properties

2014 ◽  
Vol 43 (41) ◽  
pp. 15475-15481 ◽  
Author(s):  
Xiaofeng Lv ◽  
Lu Liu ◽  
Chao Huang ◽  
Li'an Guo ◽  
Jie Wu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Transition Metals ◽  
Coordination Polymers ◽  
Metal Organic Frameworks ◽  
Organic Ligand ◽  
Tetracarboxylic Acid ◽  
Acid Ligand ◽  
Metal Organic

Five coordination polymers containing transition metals (Mn, Co, Ni) and the organic ligand [1,1′:3′,1′′-terphenyl]-3,3′′,5,5′′-tetracarboxylic acid (H4TPTA) were synthesized and characterized. Moreover, the magnetism of complexes 3–5 is also discussed.

scholarly journals Heterobimetallic One-Dimensional Coordination Polymers MICuII (M = Li and K) Based on Ferromagnetically Coupled Di- and Tetracopper(II) Metallacyclophanes

2018 ◽  
Vol 4 (3) ◽  
pp. 38 ◽  
Author(s):  
Tamyris T. da Cunha ◽  
Willian X. C. Oliveira ◽  
Emerson F. Pedroso ◽  
Francesc Lloret ◽  
Miguel Julve ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Coordination Polymers ◽  
Complex Anion ◽  
Spin Hamiltonian ◽  
One Dimensional ◽  
Carboxylate Oxygen ◽  
Out Of Plane ◽  
Ferromagnetic Interactions ◽  
Oxygen Atoms

The synthesis, crystal structure and magnetic properties of the coordination polymers of formula [EDAP{Li6(H2O)8[(Cu2(μ-mpba)2)2(H2O)2]}]n (1) and [(EDAP)2{K(H2O)4[Cu2(μ-mpba)2(H2O)2]}Cl·2H2O]n (2), in which mpba = N,N′-1,3-phenylenebis(oxamate) and EDAP2+ = 1,1′-ethylenebis(4-aminopyridinium) are described. Both compounds have in common the presence of the [Cu2(mpba)2]4− tetraanionic unit which is a [3,3] metallacyclophane motif in which the copper(II) ions are five-coordinate in a distorted square pyramidal surrounding. The complex anion in 1 is dimerized through double out-of-plane copper to outer carboxylate-oxygen atoms resulting in the centrosymmetric tetracopper(II) fragment [Cu4(μ-mpba)4(H2O)2]8− which act as a ligand toward six hydrated lithium(I) cations leading to anionic ladder-like double chains whose charge is neutralized by the EDAP2+ cations. In the case of 2, each dicopper(II) entity acts as a ligand towards tetraquapotassium(I) units to afford anionic zig zag single chains of formula {K(H2O)4[Cu2(μ-mpba)2(H2O)2]}n3n− plus EDAP2+ cations and non-coordinate chloride anions. Cryomagnetic measurements on polycrystalline samples 1 and 2 show the occurrence of ferromagnetic interactions between the copper(II) ions across the –Namidate–(C–C–C)phenyl–Namidate– exchange pathway [J = +10.6 (1) and +8.22 cm−1 (2)] and antiferromagnetic ones through the double out-of-plane carboxylate-oxygen atoms [j = −0.68 cm−1 (1), the spin Hamiltonian being defined as H = − J ( S C u 1 · S C u 2 + S C u 2 i · S C u 1 i ) − j ( S C u 2 · S C u 2 i ) ].

Five Mn(II) Coordination Polymers Based on 2,3′,5,5′-Biphenyl Tetracarboxylic Acid: Syntheses, Structures, and Magnetic Properties

2015 ◽  
Vol 15 (2) ◽  
pp. 966-974 ◽  
Author(s):  
Ying Zhao ◽  
Xin-Hong Chang ◽  
Guang-Zhen Liu ◽  
Lu-Fang Ma ◽  
Li-Ya Wang
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Tetracarboxylic Acid

Syntheses, Crystal Structures and Magnetic Properties of Two Nickel(II) Compounds with 4,4´- Bipyridine Ligands

2014 ◽  
Vol 69 (1) ◽  
pp. 62-70 ◽  
Author(s):  
Xiao-Ke Yu ◽  
Xiang-Sheng Zhai ◽  
Yue-Qing Zheng ◽  
Hong-Lin Zhu
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Benzoic Acid ◽  
Crystal Structures ◽  
Hydrothermal Reactions ◽  
Binuclear Structure ◽  
Polymeric Chains ◽  
Ferromagnetic Interactions ◽  
Weak Ferromagnetic

Hydrothermal reactions of 4,4´-bipyridine, benzoic acid/p-methylbenzoic acid, Ni(NO3)2 · 6H2O and NH4OH yielded [Ni(bpy)1.5(H2O)2(BA)2]·H2O (1) and [Ni(bpy)(HMBA)(MBA)2]n (2) (bpy = 4,4´-bipyridine, HBA = benzoic acid, HMBA = p-methylbenzoic acid). The Ni(II) ions of compound 1 are six-coordinated and bridged by 4,4´-bipyridine ligands to form a binuclear structure while complex 2 features polymeric chains which are connected by 4,4´-bipyridine molecules. Variabletemperature magnetic susceptibility measurements from 300 to 30 K showed the presence of weak ferromagnetic interactions between the Ni(II) (S = 1) ions via the 4,4´-bipyridine bridges.

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