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Journal articles on the topic 'Cobalt(II) coordination polymer'

Author: Grafiati

Published: 5 June 2025

Last updated: 24 June 2025

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1

Khunur, Mohammad Misbah, and Yuniar Ponco Prananto. "Synthesis and Structure of 2D Cobalt(II)-tartrate Hydrate Coordination Polymers Crystallised from Aqueous Solution." Bulletin of Chemical Reaction Engineering & Catalysis 13, no. 2 (2018): 213. http://dx.doi.org/10.9767/bcrec.13.2.1342.213-219.

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Cobalt(II)-tartrate hydrate coordination polymer is successfully crystallisedfrom aqueous solution at room temperature. Unlike previous methods, diammonium tartrate was used and reacted directly with an aqueous solution of cobalt(II). Single crystal X-ray and ATR-IR analyses were performed toward the synthesized crystal. The crystal structure displaysa (6,3) 2D sheet which then grow into a 3D hydrogen-bonded network. Tetra- and hexa-dentate dianionic tartaric ligands are observed in the crystal structure, in which the hexadentate ligand connects four different cobalt centres. This method is considered feasible, affordable, and simple for the production of functional polymeric cobalt(II)-tartrate hydrate. Copyright © 2018 BCREC Group. All rights reservedReceived: 17th July 2017; Revised: 30th October 2017; Accepted: 30th October 2017; Available online: 11st June 2018; Published regularly: 1st August 2018How to Cite: Khunur, M.M., Prananto, Y.P. (2018). Synthesis and Structure of 2D Cobalt(II)-tartrate Hydrate Coordination Polymers Crystallised from Aqueous Solution. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2): 213-219 (doi:10.9767/bcrec.13.2.1342.213-219)

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2

Dzesse T., Christelle N., Felicite Majoumo-Mbe, Emmanuel N. Nfor, and Susan A. Bourne. "A homochiral coordination polymer of cobalt(II) and L-serine." Acta Crystallographica Section C Structural Chemistry 77, no. 12 (2021): 764–69. http://dx.doi.org/10.1107/s2053229621011347.

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A one-dimensional chiral cobalt(II) coordination polymer, namely, catena-poly[[[(S)-2-amino-3-hydroxypropanoato-κ2 N,O 1]cobalt(II)]-μ-(S)-2-amino-3-hydroxypropanoato-κ4 O 1,O 3:N,O 1′], [Co(C3H6NO3)2] n or Δ-[Co(L-Ser-κ2 N,O)2] n (L-Ser = L-serine) (1), has been synthesized and characterized using elemental and thermal analyses, IR spectroscopy and single-crystal and powder X-ray diffraction techniques. The asymmetric unit of 1 consists of two serine anions which are coordinated to a Co2+ ion to give three chelate rings. These extend the structure into a helical chain with pendant chelate rings which participate in interchain hydrogen bonding. The ability of 1 to undergo transmetallation was evaluated. Among a range of divalent metal ions, only copper(II) partially replaced cobalt(II).

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3

Głuchowska, Halina, Renata Łyszczek, Liliana Mazur, and Alexander M. Kirillov. "Structural and Thermal Investigations of Co(II) and Ni(II) Coordination Polymers Based on biphenyl-4,4′-dioxydiacetate Linker." Materials 14, no. 13 (2021): 3545. http://dx.doi.org/10.3390/ma14133545.

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Two coordination polymers, [Co(µ4-L)(H2O)2]n (1) and [Ni(µ-L)(H2O)4]n (2), were solvothermally assembled from the corresponding metal(II) chlorides and biphenyl-4,4-dioxydiacetic acid (H2L) as a flexible dicarboxylate linker. The cobalt(II) compound 1 featured a layer-pillared 3D metal-organic network with a cds topology, while the nickel(II) derivative 2 represented a linear chain 1D coordination polymer with a 2C1 topology. The µ4− and µ-L2− linkers exhibited different denticity and coordination modes in the synthesized compounds, thus contributing to their structural diversity. The dimensionality of 1 and 2 had an influence on their thermal stability and decomposition processes, which were investigated in detail by TG-DSC and TG-FTIR methods. Thermal decomposition products of coordination polymers were also analyzed by PXRD, confirming the formation of Co3O4/CoO and NiO as final materials. The obtained compounds broaden a family of coordination polymers assembled from flexible dicarboxylate linkers.

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4

Kansız, S., G. Kaştaş, M. K. Gümüş, N. Dege, and R. Aydın. "SYNTHESIS, STRUCTURAL CHARACTERIZATION, AND SUPRAMOLECULAR ASSEMBLY OF A ONE-DIMENSIONAL COBALT(II) COORDINATION POLYMER WITH SUCCINATO AND ISONICOTINAMIDE LIGANDS." Журнал структурной химии 66, no. 4 (2025): 142957. https://doi.org/10.26902/jsc_id142957.

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A novel one-dimensional coordination polymer, catena-poly[μ-succinatobis(isonicotinamide-κN)diaquacobalt(II)], [Co(suc)(ina)₂(H₂O)₂]n (suc = succinate, ina = isonicotinamide), was synthesized via the reaction of cobalt(II) chloride hexahydrate, sodium hydroxide, succinic acid, and isonicotinamide in aqueous methanol. Structural characterization using single-crystal X-ray diffraction, FT-IR spectroscopy, and thermal analysis revealed that Co(II) exhibits an octahedral coordination geometry, with succinate bridging the cobalt centers to form a one-dimensional polymeric chain. Extensive hydrogen bonding stabilizes the three-dimensional supramolecular architecture.

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5

Giuseppe, Bruno, Nicolò Francesco, Grassi Giovanni, Saccà Alessandro та Viviana Mollica Nardo. "Poly[(μ4-decanedioato)cobalt(II)]". Acta Crystallographica Section E Structure Reports Online 70, № 5 (2014): m159. http://dx.doi.org/10.1107/s1600536814006011.

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In the title compound, [Co(C10H16O4)]n, the CoIIatom is bonded in a slightly distorted tetrahedral environment by four O atoms from the bridging sebacate dications, comprising two separate half-ligands which lie across crystallographic inversion centres. In the three-dimensional network coordination polymer, there are two different spatial extensions of CoIIatoms, one with the CoIIatoms lying parallel to (100) [Co...Co = 4.653 (1) Å], the other lying parallel to (010) [Co...Co = 4.764 (1) Å].

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6

Li, Bai-Ling, Jun-Ku Wang, Jin-Sheng Gao, Ying-Hui Yu, and Dong-Sheng Ma. "A semi-rigid tricarboxylate ligand based Co(ii) coordination polymer: construction and applications in multiple sensing." New Journal of Chemistry 44, no. 9 (2020): 3664–71. http://dx.doi.org/10.1039/c9nj05766h.

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7

Zaręba, J. K., J. Janczak, M. Samoć, and M. Nyk. "Spectrally-resolved third-harmonic generation and the fundamental role of O–H⋯Cl hydrogen bonding in Oh, Td-cobalt(ii) tetraphenylmethane-based coordination polymers." Dalton Transactions 46, no. 29 (2017): 9349–57. http://dx.doi.org/10.1039/c7dt01518f.

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8

Pariyar, Anand, Siddharth Gopalakrishnan, Joseph Stansbery, et al. "A 1-D coordination polymer route to catalytically active Co@C nanoparticles." RSC Advances 6, no. 45 (2016): 38533–40. http://dx.doi.org/10.1039/c6ra04650a.

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Pyrolysis of a 1-D polymeric cobalt(ii) coordination complex ([Co(BDC)(Mim)<sub>2</sub>]<sub>n</sub>, H<sub>2</sub>BDC = benzenedicarboxylic acid; Mim = N-methylimidazole) results in the formation of carbon embedded fcc cobalt nanoparticle composites, Co@C.

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9

Fischer, Andrei I., Vladislav V. Gurzhiy, Julia V. Aleksandrova та Maria I. Pakina. "Crystal structure of a CoIIcoordination polymer:catena-poly[[μ-aqua-bis(μ-2-methylpropanoato)-κ2O:O′;κ2O:O-cobalt(II)] monohydrate]". Acta Crystallographica Section E Crystallographic Communications 73, № 3 (2017): 318–21. http://dx.doi.org/10.1107/s2056989017001360.

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In the title cobalt(II) coordination polymer with isobutyrate ligands, {[Co{CH(CH3)2CO2}2(H2O)]·H2O}n, the Co2+ion is hexacoordinated in a slightly distorted octahedral coordination environment defined by two O atoms from two bridging water molecules and four O atoms from four bridging carboxylate ligands. The carboxylates adopt two different coordination modes, μ-(κ2O:O′) and μ-(κ2O:O), forming a one-dimensional polymeric chain extending along [010]. The intra-chain cobalt...cobalt separation is 3.2029 (2) Å. The polymeric chains are linked by hydrogen bonds involving the water molecules of solvation, giving a two-dimensional network structure lying parallel to (100).

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10

Trunova, O. K., L. I. Zheleznova, V. V. Dyakonenko, L. I. Sliusarchuk, O. О. Shtokvysh, and O. V. Berzenina. "Crystal structure of the mixed-ligand complex of Co(II) with succinic acid and pyridine." Voprosy Khimii i Khimicheskoi Tekhnologii, no. 1 (February 2025): 45–54. https://doi.org/10.32434/0321-4095-2025-158-1-45-54.

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A new mixed-ligand complex {[Со(С4Н4О4)2Ру]2H2O}n was synthesized via the interaction of equimolar amounts of cobalt nitrate and sodium succinate in the presence of pyridine at pH 5.5–6.0. The complex was investigated by X-ray structure analysis, elemental analysis, UV/VIS and IR spectroscopies, and differential thermal analysis. The complex is a one-dimensional coordination polymer and crystallizes in the orthorhombic space group Pbca with unit cell parameters a=11.8945 Å, b=8.9064 Å, c=15.1116 Å, ===900. The atom of cobalt has a slightly distorted octahedral N2O4 environment and forms Co–N bonds with two molecules of pyridine and Co–O bonds with the carboxyl groups of two symmetric succinic acid molecules. The coordination number Co(II) is supplemented up to 6 by two water molecules, which are located in the axial plane of the coordination polyhedron. Due to the monodentate coordination of two symmetrically independent carboxylate oxygen atoms of one succinic acid molecule, one-dimensional coordination polymer chains are formed. Polymer chains in the crystal are united by intermolecular hydrogen bonds, which leads to the formation of layers packed in the crystal parallel to the (001) plane. Hirschfeld surface analysis and two-dimensional fingerprint plots were used to analyze the intermolecular interactions present in the crystal.

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11

Jiang, Wen-Hong, Han-Zhong Zhang, Guang-Feng Hou, Dong-Sheng Ma, Bin Liu, and Ying-Hui Yu. "Five Co(ii) coordination polymers with different counter anions based on [3,5-di(4H-1,2,4-triazol-4-yl)benzoato]− ligand: directed synthesis, structures and magnetic properties." RSC Adv. 7, no. 72 (2017): 45641–51. http://dx.doi.org/10.1039/c7ra07089f.

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12

Nakane, Tomohiro, Shinobu Aoyagi, and Wataru Fujita. "Magnetic and thermal studies of a coordination polymer: bis(glycolato)nickel(ii)." New Journal of Chemistry 44, no. 25 (2020): 10519–24. http://dx.doi.org/10.1039/d0nj01450h.

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13

Palion-Gazda, Joanna, Tomasz Klemens, Barbara Machura, Julia Vallejo, Francesc Lloret, and Miguel Julve. "Single ion magnet behaviour in a two-dimensional network of dicyanamide-bridged cobalt(ii) ions." Dalton Transactions 44, no. 7 (2015): 2989–92. http://dx.doi.org/10.1039/c4dt03574g.

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The 2D coordination polymer of dca-bridged cobalt(ii), [Co(dca)<sub>2</sub>(atz)<sub>2</sub>]<sub>n</sub>, exhibits slow relaxation of the magnetization at low temperatures being thus a new example of single-ion magnet (SIM).

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14

Škugor Rončević, Ivana, Marijo Buzuk, Boris-Marko Kukovec, Vesna Sokol, Maša Buljac, and Nives Vladislavić. "Electrochemical Properties and Perspectives of Nickel(II) and Cobalt(II) Coordination Polymers-Aspects and an Application in Electrocatalytic Oxidation of Methanol." Crystals 13, no. 5 (2023): 718. http://dx.doi.org/10.3390/cryst13050718.

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The electrochemical sensing potential of two isostructural one-dimensional nickel(II) and cobalt(II) coordination polymers with 4,4′-bipyridine (4,4′-bpy) and 6-oxonicotinate (6-Onic), namely, {[Ni(4,4′-bpy)(H2O)4](6-Onic)2×2H2O}n and {[Co(4,4′-bpy)(H2O)4](6-Onic)2×2H2O}n, was investigated along with the polymers’ potential applications in the catalytic oxidation of methanol. The highly oxidative species from redox pairs Ni(II)/Ni(III) and Co(II)/Co(III) in these compounds represent catalytically active centres for oxidation of small molecules. A glassy carbon electrode (GCE) modified with a Ni polymer showed stability and reproducibility in 0.1 M NaOH, while the oxidation current inc 2reased with the increasing methanol concentration, suggesting that the Ni-polymer-modified electrode possess good sensing ability with respect to methanol. The GC electrode modified with the Co polymer is not reproducible and cannot be used for electroanalytical purposes under these experimental conditions. The GC electrode modified with the Ni polymer was successfully applied in the determination of methanol. This method showed favourable linear concentration dependence with a good sensitivity of 2.65 and 11.0 mA mM−1, a wide concentration range (0.001–4 mM), and a detection limit of 0.8 μM, which indicates its excellent application potential for methanol oxidation and thus its determination.

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15

Liu, Xiangyu, Xiufang Ma, Peipei Cen, et al. "One-dimensional cobalt(ii) coordination polymer featuring single-ion-magnet-type field-induced slow magnetic relaxation." New Journal of Chemistry 42, no. 12 (2018): 9612–19. http://dx.doi.org/10.1039/c8nj01236a.

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Single-ion-magnet-type field-induced double magnetic relaxation was observed in a one-dimensional cobalt(ii) coordination polymer which shows easy-axis anisotropy with D = −33.9 cm<sup>−1</sup> and an energy barrier of U<sub>eff</sub> = 38.8 K.

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16

Mansour, Anissa, Yassin Belghith, Mohamed Salah Belkhiria, Anna Bujacz, Vincent Guérineau та Habib Nasri. "Synthesis, crystal structures and spectroscopic characterization of Co(II) bis(4,4′-bipyridine) with meso-porphyrins α,β,α,β-tetrakis(o-pivalamidophenyl) porphyrin (α,β,α,β-TpivPP) and tetraphenylporphyrin (TPP)". Journal of Porphyrins and Phthalocyanines 17, № 11 (2013): 1094–103. http://dx.doi.org/10.1142/s1088424613500843.

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The reaction of the starting materials [ Co II ( Porph )] (Porph = α,α,α,α-tetrakis(o-pivalamidophenyl)porphyrin (TpivPP) and the meso-tetraphenylporphyrin (TPP)) with an excess of 4,4′-bipyridine in chlorobenzene leads to the creation of two cobalt(II) derivatives: [ Co II (α,β,α,β- TpivPP )(4,4′- bpy )2]· C 6 H 5 Cl · C 6 H 14(1) and [ Co II ( TPP )(4,4′- bpy )2]·2 bpy (2). These compounds have been characterized by UV-vis, IR, 1 H NMR and MALDI-TOF spectroscopy. The proton NMR spectra of (1) and (2) clearly indicated that these derivatives are paramagnetic while the UV-vis data confirmed creation of a new six-coordinated or penta-coordinated Co ( II )-meso-porphyrin complexes by displaying red shifted Soret bands. The determined X-ray structures of (1) and (2) show that in the solid state these species are considered as coordination polymers which consist of 1D chains of alternating [ Co II ( Porph )] and 4,4′-bipyridine molecules located at the axial positions of the cobalt(II) coordination sphere. The coordination geometry of Co ( II ) in (1) and (2) is octahedral; the porphyrin (TpivPP or TPP) acts as a tetradentate chelating ligand with four nitrogen atoms from the pyrrole moieties occupying the equatorial positions along the porphyrin core. The N -donor atoms of the 4,4′-bipyridine create the axial ligands. It is noteworthy that for complex (1) the starting porphyrin is the α,α,α,α-TpivPP atropisomer but the final coordination polymer contains the α,β,α,β-TpivPP conformer.

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17

Vušak, Darko, Neven Smrečki, Biserka Prugovečki, et al. "Cobalt, nickel and copper complexes with glycinamide: structural insights and magnetic properties." RSC Advances 9, no. 38 (2019): 21637–45. http://dx.doi.org/10.1039/c9ra03693h.

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18

Karthikeyan, Ammasai, Packianathan Thomas Muthiah, and Franc Perdih. "Supramolecular architectures in CoIIand CuIIcomplexes with thiophene-2-carboxylate and 2-amino-4,6-dimethoxypyrimidine ligands." Acta Crystallographica Section C Structural Chemistry 72, no. 5 (2016): 442–50. http://dx.doi.org/10.1107/s2053229616006148.

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The coordination chemistry of mixed-ligand complexes continues to be an active area of research since these compounds have a wide range of applications. Many coordination polymers and metal–organic framworks are emerging as novel functional materials. Aminopyrimidine and its derivatives are flexible ligands with versatile binding and coordination modes which have been proven to be useful in the construction of organic–inorganic hybrid materials and coordination polymers. Thiophenecarboxylic acid, its derivatives and their complexes exhibit pharmacological properties. Cobalt(II) and copper(II) complexes of thiophenecarboxylate have many biological applications, for example, as antifungal and antitumor agents. Two new cobalt(II) and copper(II) complexes incorporating thiophene-2-carboxylate (2-TPC) and 2-amino-4,6-dimethoxypyrimidine (OMP) ligands have been synthesized and characterized by X-ray diffraction studies, namely (2-amino-4,6-dimethoxypyrimidine-κN)aquachlorido(thiophene-2-carboxylato-κO)cobalt(II) monohydrate, [Co(C5H3O2S)Cl(C6H9N3O2)(H2O)]·H2O, (I), andcatena-poly[copper(II)-tetrakis(μ-thiophene-2-carboxylato-κ2O:O′)-copper(II)-(μ-2-amino-4,6-dimethoxypyrimidine-κ2N1:N3)], [Cu2(C5H3O2S)4(C6H9N3O2)]n, (II). In (I), the CoIIion has a distorted tetrahedral coordination environment involving one O atom from a monodentate 2-TPC ligand, one N atom from an OMP ligand, one chloride ligand and one O atom of a water molecule. An additional water molecule is present in the asymmetric unit. The amino group of the coordinated OMP molecule and the coordinated carboxylate O atom of the 2-TPC ligand form an interligand N—H...O hydrogen bond, generating anS(6) ring motif. The pyrimidine molecules also form a base pair [R22(8) motif]viaa pair of N—H...N hydrogen bonds. These interactions, together with O—H...O and O—H...Cl hydrogen bonds and π–π stacking interactions, generate a three-dimensional supramolecular architecture. The one-dimensional coordination polymer (II) contains the classical paddle-wheel [Cu2(CH3COO)4(H2O)2] unit, where each carboxylate group of four 2-TPC ligands bridges two square-pyramidally coordinated CuIIions and the apically coordinated OMP ligands bridge the dinuclear copper units. Each dinuclear copper unit has a crystallographic inversion centre, whereas the bridging OMP ligand has crystallographic twofold symmetry. The one-dimensional polymeric chains self-assembleviaN—H...O, π–π and C—H...π interactions, generating a three-dimensional supramolecular architecture.

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19

Wang, Yujing. "Cobalt(II) Coordination Polymer Based on Dicarboxylate and Nitrogen-Containing Ligands." Asian Journal of Chemistry 26, no. 20 (2014): 7073–74. http://dx.doi.org/10.14233/ajchem.2014.17401.

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20

Min, Dongwon, Seung Soo Yoon, Ji Hwa Lee, Myungkoo Suh, and Soon W. Lee. "A three-dimensional cobalt(II)-coordination polymer based on 3,5-pyridinedicarboxylate." Inorganic Chemistry Communications 4, no. 6 (2001): 297–300. http://dx.doi.org/10.1016/s1387-7003(01)00197-6.

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21

Wen, Wu, Xie Jimin, and Xuan Yawen. "Coordination polymer incorporating cobalt(II) and glycine acid: structure and magnetism." Journal of Coordination Chemistry 62, no. 3 (2009): 373–79. http://dx.doi.org/10.1080/00958970802283065.

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22

AL-Fayaad, Hydar A., Rashid G. Siddique, Kasun S. Athukorala Arachchige, and Jack K. Clegg. "A Two-Dimensional Coordination Polymer Formed from Cobalt(II) and an Extended Dipyridyl Ligand." Australian Journal of Chemistry 73, no. 6 (2020): 547. http://dx.doi.org/10.1071/ch19468.

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The synthesis of the extended dipyridyl ligand 4,4′-(2,5-dimethyl-1,4-phenylene)dipyridine (L) in an improved yield via the palladium catalysed Suzuki coupling of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (1) and 1,4-dibromo-2,5-dimethylbenzene (2) is reported along with its use to form a two-dimensional coordination polymer [Co2L2(OAc)4(H2O)2]n. The coordination polymer consists of one-dimensional chains of octahedral cobalt ions bridged by acetate ligands which are connected to form two dimensional sheets with square lattice (sql) topology via the dipyridyl ligands (L). The structure contains small voids totalling ~6.6% of the unit cell volume. The crystal structures 1, L, L·2H2O, and L·2HNO3 are also reported.

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23

Hsu, Shih-Chen, Pei-Shiuan Chiang, Hsin-Kuan Liu, Sheng-Han Lo, and Chia-Her Lin. "Multi-Dimensional Cobalt(II) and Nickel(II) Coordination Polymers." Journal of the Chinese Chemical Society 59, no. 1 (2012): 18–27. http://dx.doi.org/10.1002/jccs.201100492.

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24

Talukder, Pritha, Amitabha Datta, Samiran Mitra та Georgina Rosair. "A New One-Dimensional Coordination Polymer [Co(CCl3COO)2(CH3OH)2(μ-4,4’-bipy)]n: Synthesis and Structural Aspects". Zeitschrift für Naturforschung B 60, № 1 (2005): 33–36. http://dx.doi.org/10.1515/znb-2005-0106.

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A new one-dimensional coordination polymer [Co(CCl3COO)2(CH3OH)2(μ-4,4’-bipy)]n (1), has been synthesised and its crystal structure determined by single-crystal X-ray diffraction. The structure consists of a one-dimensional linear chain of cobalt(II) centres linked by bridging 4,4’-bipyridine units. The Co(II) ion lies at an inversion centre forming an elongated octahedral coordination sphere. There is an intramolecular hydrogen bond [2.02(5) Å ] between a trichloroacetate oxygen and a methanolic hydrogen forming a planar six-membered ring.

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25

Springsteen, Caleb H., та Robert L. LaDuca. "catena-Poly[[bis(thiocyanato-κN)cobalt(II)]-μ-di-4-pyridylamine-κ2 N:N′]". Acta Crystallographica Section E Structure Reports Online 63, № 11 (2007): m2705. http://dx.doi.org/10.1107/s1600536807049276.

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In the title compound, [Co(NCS)2(C10H9N3)], a CoII atom with tetrahedral coordination is bound by two N-donor thiocyanate anions and two N-donor atoms from two crystallographically distinct di-4-pyridylamine (dpa) ligands whose central NH units lie on twofold axes. The dpa ligands link the Co atoms into one-dimensional [Co(NCS)2(dpa)] n coordination polymer chains that propagate along the b-axis direction.

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26

Karushev, Mikhail. "A Novel Cobalt Metallopolymer with Redox-Matched Conjugated Organic Backbone via Electropolymerization of a Readily Available N4 Cobalt Complex." Polymers 13, no. 10 (2021): 1667. http://dx.doi.org/10.3390/polym13101667.

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Fast and reversible cobalt-centered redox reactions in metallopolymers are the key to using these materials in energy storage, electrocatalytic, and sensing applications. Metal-centered electrochemical activity can be enhanced via redox matching of the conjugated organic backbone and cobalt centers. In this study, we present a novel approach to redox matching via modification of the cobalt coordination site: a conductive electrochemically active polymer was electro-synthesized from [Co(Amben)] complex (Amben = N,N′-bis(o-aminobenzylidene)ethylenediamine) for the first time. The poly-[Co(Amben)] films were investigated by cyclic voltammetry, electrochemical quartz crystal microbalance (EQCM), in situ UV-vis-NIR spectroelectrochemistry, and in situ conductance measurements between −0.9 and 1.3 V vs. Ag/Ag+. The polymer displayed multistep redox processes involving reversible transfer of the total of 1.25 electrons per repeat unit. The findings indicate consecutive formation of three redox states during reversible electrochemical oxidation of the polymer film, which were identified as benzidine radical cations, Co(III) ions, and benzidine di-cations. The Co(II)/Co(III) redox switching is retained in the thick polymer films because it occurs at potentials of high polymer conductivity due to the optimum redox matching of the Co(II)/Co(III) redox pair with the organic conjugated backbone. It makes poly-[Co(Amben)] suitable for various practical applications based on cobalt-mediated redox reactions.

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27

Cheng, Shu-Yuan, Qinguo Zhang, Quan Tang, Michelle C. Neary, and Shengping Zheng. "Diverse Cobalt(II) and Iron(II/III) Coordination Complexes/Polymers Based on 4′-Pyridyl: 2,2′;6′,2″-Terpyridine: Synthesis, Structures, Catalytic and Anticancer Activities." Chemistry 6, no. 5 (2024): 1099–110. http://dx.doi.org/10.3390/chemistry6050064.

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The success of platinum-based chemotherapeutic drugs for clinical cancer treatments has inspired tremendous research efforts on developing new metallic anticancer agents with improved cytotoxic activity and reduced side effects. 2,2′;6′,2″-Terpyridine and its 4′-substituted derivatives have showed great potential as ligand compartments for designing new anticancer drug candidates involving base metals. In this work, we synthesized a series of cobalt and iron coordination compounds based on 4′-pyridyl-2,2′;6′,2″-terpyridine, including homoleptic complexes, a dinuclear bridged complex and 1- and 2-dimensional coordination polymers/networks. The polymorphism of two homoleptic CoII and FeII complexes has been described along with the structural characterization of a CoII coordination polymer and dinuclear FeIII complex by X-ray crystallography. These compounds were tested preliminarily as precatalysts for the regioselective hydrosilylation of styrene. Their cytotoxic activities against two human breast cancer cell lines (MCF-7 and MDA-MB 468) and a normal breast epithelial cell line (MCF-10A) were investigated in order to observe the best-performing drug candidates.

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28

Mondal, Amit Kumar, Arpan Mondal, and Sanjit Konar. "Slow Magnetic Relaxation in a One-Dimensional Coordination Polymer Constructed from Hepta-Coordinate Cobalt(II) Nodes." Magnetochemistry 6, no. 4 (2020): 45. http://dx.doi.org/10.3390/magnetochemistry6040045.

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A one-dimensional coordination polymer was synthesized employing hepta-coordinate CoII as nodes and dicyanamide as linkers. Detailed direct current (DC) and alternating current (AC) magnetic susceptibility measurements reveal the presence of field-induced slow magnetic relaxation behavior of the magnetically isolated seven-coordinate CoII center with an easy-plane magnetic anisotropy. Detailed ab initio calculations were performed to understand the magnetic relaxation processes. To our knowledge, the reported complex represents the first example of slow magnetic relaxation in a one-dimensional coordination polymer constructed from hepta-coordinate CoII nodes and dicyanamide linkers.

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29

Demessence, Aude, Guillaume Rogez, Richard Welter, and Pierre Rabu. "Structure and Magnetic Properties of a New Cobalt(II) Thiophenedicarboxylate Coordination Polymer Showing Unprecedented Coordination." Inorganic Chemistry 46, no. 9 (2007): 3423–25. http://dx.doi.org/10.1021/ic070046u.

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30

Oliynyk, L. P., О. І. Makota, ,. Z. M. Komarenska, and S. I. Gerasimchuk. "RESEARCH OF COMPLEX FORMATION OF POLYETHYLENIMINE WITH COPPER (II), NICKEL (II), COBALT (II) IONS." Chemistry, Technology and Application of Substances 5, no. 2 (2022): 16–23. http://dx.doi.org/10.23939/ctas2022.02.016.

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There is described the influence of polyethylenimine globule structure on complexation with copper (II), nickel (II) and cobalt (II) ions. There are determined the values of the coordination number with the change of the pH of the solution for the complexes of ethylenediamine, diethylenetriamine and polyethylenimine with metal ions. It is investigated that the complexation of these metal ions with low molecular weight amines passes through three stages and with PEI through two stages. It is shown that the content of free nitrogen atoms in PEI, which do not react with metal ions, increases with increasing concentration of PEI in solution. The number of monomer units associated with metal ions depends on the size of the globule of the macromolecule, as well as the reaction process. The complexation reaction in solution is determined by the diffusion of metal ions into the polymer globule. If the reaction takes place in a diffusion field at a low polymer concentration, the rate of complexation is proportional to the concentration of macromolecules and the concentration of metal ions in solution.

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31

Zhang, Xian-Fa, Shan Gao, Li-Hua Huo та Hui Zhao. "A two-dimensional cobalt(II) coordination polymer: poly[chloro(μ-imidazole-1,3-diyldiacetato-κ4O:O′:O′′:O′′′)cobalt(II)]". Acta Crystallographica Section E Structure Reports Online 62, № 12 (2006): m3359—m3361. http://dx.doi.org/10.1107/s1600536806047775.

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32

Saelim, Thawanrat, Kittipong Chainok, Filip Kielar, and Nanthawat Wannarit. "Crystal structure of a novel one-dimensional zigzag chain-like cobalt(II) coordination polymer constructed from 4,4′-bipyridine and 2-hydroxybenzoate ligands." Acta Crystallographica Section E Crystallographic Communications 76, no. 8 (2020): 1302–6. http://dx.doi.org/10.1107/s2056989020009482.

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A novel one-dimensional zigzag chain-like CoII coordination polymer constructed from 4,4′-bipyridine (4,4′-bpy) and 2-hydroxybenzoate (2-OHbenz) ligands, namely, catena-poly[[(4,4′-bipyridine-κN)(μ-2-hydroxybenzoato-κ2 O:O′)(2-hydroxybenzoato-κ2 O,O′)cobalt(II)]-μ-4,4′-bipyridine-κ2 N:N′-[aquahemi(μ-4,4′-bipyridine-κ2 N:N′)(2-hydroxybenzoato-κO(2-hydroxybenzoato-κ2 O:O′)cobalt(II)], [Co2(C7H5O3)4(C10H8N2)2.5(H2O)] n , has been synthesized by reacting cobalt(II) nitrate trihydrate, 4,4′-bpy and 2-hydroxybenzoic acid in a mixture of water and methanol at room temperature. There are two independent CoII centers, Co1 and Co2, in the asymmetric unit, revealing a distorted octahedral geometry with chromophore types of [CoN2O4] and [CoN2O3O′], respectively. The Co1 ions are doubly bridged by 2-OHbenz ligands with syn–anti coordination mode, generating a dinuclear unit. The bridging 4,4′-bpy ligands connect these dinuclear units and the mononuclear Co2 chromophores, providing a one-dimensional alternating zigzag chain-like structure. In the crystal, intermolecular hydrogen bonds, C—H...π and π–π stacking interactions are observed and these help to consolidate the packing. In addition, the physical properties of the title compound are reported.

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33

Ma, Jian-Fang, Jin Yang, and Jing-Fu Liu. "A novel cobalt(II) coordination polymer containing the fumarate anion ando-phenanthroline." Acta Crystallographica Section C Crystal Structure Communications 59, no. 8 (2003): m304—m306. http://dx.doi.org/10.1107/s0108270103012101.

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34

Zhang, Guoqi, Jing Wu, Sihan Li, Sean Cass, and Shengping Zheng. "Markovnikov-Selective Hydroboration of Vinylarenes Catalyzed by a Cobalt(II) Coordination Polymer." Organic Letters 20, no. 24 (2018): 7893–97. http://dx.doi.org/10.1021/acs.orglett.8b03431.

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35

Ndifon, Peter T., Moise O. Agwara, Awawou G. Paboudam, et al. "Synthesis, characterisation and crystal structure of a cobalt(II)-hexamethylenetetramine coordination polymer." Transition Metal Chemistry 34, no. 7 (2009): 745–50. http://dx.doi.org/10.1007/s11243-009-9257-1.

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36

Nakane, Tomohiro, Shota Yoneyama, Takeshi Kodama, et al. "Magnetic, thermal, and neutron diffraction studies of a coordination polymer: bis(glycolato)cobalt(ii)." Dalton Transactions 48, no. 1 (2019): 333–38. http://dx.doi.org/10.1039/c8dt04358b.

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The two-dimensional quadratic lattice magnet, bis(glycolato)cobalt(ii) ([Co(HOCH<sub>2</sub>CO<sub>2</sub>)<sub>2</sub>]), showed antiferromagnetic ordering at 15.2 K and an abrupt increase in magnetisation at H = 22 600 Oe and 2 K, thereby acting as a metamagnet.

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37

Zhang, Guoqi, Sihan Li, Jing Wu, et al. "Highly efficient and selective hydroboration of terminal and internal alkynes catalysed by a cobalt(ii) coordination polymer." Organic Chemistry Frontiers 6, no. 18 (2019): 3228–33. http://dx.doi.org/10.1039/c9qo00834a.

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38

Huang-Fu, You-Jing, Hui Pan, Xi-Cai Hao, Yan Bai, and Dong-Bin Dang. "Hydrothermal Synthesis and Crystal Structure of a One-dimensional Cobalt (II) Coordination Polymer with Two Organic Ligands." Zeitschrift für Naturforschung B 69, no. 6 (2014): 699–703. http://dx.doi.org/10.5560/znb.2014-3342.

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A new Co(II) coordination polymer [Co(Hdpa)2(dpdo)(H2O)2] (1) (H2dpa=2,2`-biphenyldicarboxylic acid, dpdo=4,4`-bipyridine-N,N`-dioxide) has been synthesized and characterized by IR and UV=Vis spectroscopy, elemental analysis, and single-crystal X-ray structure analysis. The Co(II) atom has a distorted octahedral coordination environment with a set of oxygen donors from two Hdpa- ligands, two dpdo ligands and two coordinated water molecules. Adjacent cobalt centers are bridged by dpdo ligands thereby generating a chain. In the solid state, the chains further interact with each other and form a 3D supramolecular network via C-H···π interactions and multiform hydrogen bonds.

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39

Li, Guo-Bi, Qing-Yuan Yang, Rong-Kai Pan, and Sheng-Gui Liu. "Diverse cobalt(ii) coordination polymers for water/ethanol separation and luminescence for water sensing applications." CrystEngComm 20, no. 27 (2018): 3891–97. http://dx.doi.org/10.1039/c8ce00709h.

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N,N′-Bis(3-pyridylmethyl)pyromellitic diimide has four conformations, which lead to four types of cobalt(ii) coordination polymers. Such coordination networks can be used for luminescent water sensing and water/ethanol separation.

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40

Xia, Chang-Kun, Wen Wu, Qiu-Yun Chen та Ji-Min Xie. "catena-Poly[[[2-(2-pyridyl)-1H-benzimidazole]cobalt(II)]-μ-benzene-1,4-dicarboxylato]". Acta Crystallographica Section E Structure Reports Online 63, № 11 (2007): m2726. http://dx.doi.org/10.1107/s1600536807049264.

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In the title coordination polymer, [Co(C8H4O4)(C12H9N3)] n , the CoII atom exists in an octahedral coordination environment formed by four carboxylate O atoms from two benzene-1,4-dicarboxylate ligands, and two N atoms from the 2-(2-pyridyl)benzimidazole ligand. Bridging by the benzene-1,4-dicarboxylate ligand leads to a zigzag chain structure, and intermolecular N—H...O hydrogen bonds as well as π–π interactions between the pyridyl ring and the benzene ring of the 2-(2-pyridyl)benzimidazole ligand (centroid–centroid distances = 3.678 and 3.697 Å) link the chains into a three-dimensional framework.

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41

(Mrs.), P. R. SHUKLA, AHMAD NIHAL, and B. AWASTHI B. "Studies on Coordination Polymers. Part-II. Polymeric Complexes of Di(o-amino- phenyl)disulphide with Nickel(II), Cobalt(II), Manganese(II) and Chromium(III)." Journal of Indian Chemical Society Vol. 67, May 1990 (1990): 418–20. https://doi.org/10.5281/zenodo.6203162.

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Department of Chemistry, Lucknow University, Lucknow-226 007 <em>Manuscript received 6 February 1989, revised 7 December 1989, accepted 21 December 1989</em> Studies on Coordination Polymers. Part-II. Polymeric Complexes of Di(<em>o</em>-amino-phenyl) disulphide with Nickel(II),Cobalt(II), Manganese(II) and Chromium(III).          

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42

Fan, Yan, Dong-Cheng Hu, Xiao-Qiang Yao, Yun-Xia Yang, and Jia-Cheng Liu. "Four cobalt(ii) complexes based on a new tricarboxylate with a naphthalene ring and different N-containing ligands: synthesis, crystal structures and magnetic properties." New Journal of Chemistry 40, no. 6 (2016): 5010–18. http://dx.doi.org/10.1039/c6nj00065g.

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43

Roy, Subhasis, Somnath Choubey, Kishalay Bhar, et al. "Counter anion dependent gradual spin transition in a 1D cobalt(ii) coordination polymer." Dalton Transactions 44, no. 17 (2015): 7774–76. http://dx.doi.org/10.1039/c5dt00056d.

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One Co(ii) SCO coordination polymer [Co(enbzpy)(μ<sub>1,5</sub>-dca)]<sub>n</sub>(PF<sub>6</sub>)<sub>n</sub> (1·PF<sub>6</sub>) has been isolated and characterised structurally and magnetostructurally. Contrasting magnetic behavior of 1·PF<sub>6</sub> in comparison to 1·ClO<sub>4</sub> has been analysed in terms of structural factors.

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44

Du, Zhong-Xiang, and Jun-Xia Li. "A cobalt(II) coordination polymer constructed with the 2-carboxy-phenoxyacetate linker showing a corrugated layer structure: synthesis, structure analysis and magnetic properties." Zeitschrift für Naturforschung B 75, no. 6-7 (2020): 577–81. http://dx.doi.org/10.1515/znb-2020-0042.

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AbstractA new binary CoII coordination polymer, [Co(2-cpa)2(H2O)]n (1) has been synthesized by a hydrothermal reaction of cobalt(II) acetate tetrahydrate and 2-carboxy-phenoxyacetic acid (2-H2cpa) in the presence of potassium hydroxide. Structural analysis revealed that the central CoII ion is in an octahedral geometry coordinated with one aqua and five oxygen atoms of three 2-carboxy-phenoxyacetate (2-cpa) ligands. The 2-cpa anions function as pentadentate double bridging chelate-μ3 linkers binding neighboring CoII ions together, to form an unusual corrugated (4,4)-connected layer. Variable-temperature magnetic susceptibility data in the 2–300 K temperature range indicates a weak antiferromagnetic coupling between adjacent cobalt(II) ions.

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45

Tang, Long, Feng Fu, Ji-Jiang Wang, Qi-Rui Liu та Hang-Hang Zhao. "A one-dimensional cobalt(II) coordination polymer based on 2,4′-oxydibenzoic acid: poly[[[diaquabis[2-(4-carboxyphenoxy)benzoato-κO1]cobalt(II)]-μ-4,4′-bipyridine-κ2N:N′] dihydrate]". Acta Crystallographica Section C Structural Chemistry 70, № 7 (2014): 654–58. http://dx.doi.org/10.1107/s2053229614012066.

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The reaction of CoSO4with 2,4-oxydibenzoic acid (H2oba) and 4,4′-bipyridine (bipy) under hydrothermal condition yielded a new one-dimensional cobalt(II) coordination polymer, {[Co(C14H9O5)2(C10H8N2)(H2O)2]·2H2O}n, which was characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis, magnetic properties and single-crystal X-ray diffraction. The CoIIions are connected by bipy ligands into infinite one-dimensional chains. The Hoba−ligands extend out from the two sides of the one-dimensional chain. O—H...O hydrogen bonding extends these chains into a two-dimensional supramolecular architecture.

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46

Kong, Jiao-Jiao, Yu-Xuan Jiang, Jia-Chen Zhang, Dong Shao, and Xing-Cai Huang. "Two-dimensional magnetic materials of cobalt(ii) triangular lattices constructed by a mixed benzimidazole–dicarboxylate strategy." CrystEngComm 21, no. 15 (2019): 2596–604. http://dx.doi.org/10.1039/c9ce00129h.

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47

Saalfrank, Rolf W., Oliver Struck, Karl Peters, and Hans Georg von Schnering. "Synthese, Reaktivität und Struktur von Semicorrinatcobalt-Komplexen [1] / Synthesis, Reactivity and Structure of Cobalt Semicorrinate Complexes [1]." Zeitschrift für Naturforschung B 49, no. 10 (1994): 1415–24. http://dx.doi.org/10.1515/znb-1994-1019.

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AbstractRecently we have shown that reaction of copper(II) acetate with pyrrolidines 3 (HL1) and 4 (HL2) leads to the formation of the 2D-coordination polymer 1 and the helical 1 D-polymer 2. Ligands of semicorrin type 9 (HL3-5) exhibit similar structural motives compared with the tridentate pyrrolidine ligands 3 and 4. Reaction of semicorrin 9a (HL3) with Co(II) acetate yields the mononuclear chelate complex 10a (CoL32), whereas in the presence of oxygen the formation of the oxidation product 14 [CoL32(OAc)] is observed. The chiral semicorrin ligands 9b, c (HL4, HL5) react with metal(II) acetates to give the complexes 10b,c-13b,c via diastereospecific complexation. The structures of the cobalt complexes have been established by single-crystal X-ray diffraction.

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48

Škugor Rončević, Ivana, Nives Vladislavić, Nabanita Chatterjee, Vesna Sokol, Clive L. Oliver, and Boris-Marko Kukovec. "Structural and Electrochemical Studies of Cobalt(II) and Nickel(II) Coordination Polymers with 6-Oxonicotinate and 4,4′-Bipyridine." Chemosensors 9, no. 12 (2021): 352. http://dx.doi.org/10.3390/chemosensors9120352.

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The 6-oxonicotinate (6-Onic) salts of a one-dimensional cationic cobalt(II) or nickel(II) coordination polymers with 4,4′-bipyridine (4,4′-bpy), namely {[Co(4,4′-bpy)(H2O)4](6-Onic)2·2H2O}n (1) and {[Ni(4,4′-bpy)(H2O)4](6-Onic)2·2H2O}n (2), were prepared hydrothermally by reactions of cobalt(II) nitrate hexahydrate or nickel(II) nitrate hexahydrate, respectively, 6-hydroxynicotinic acid and 4,4′-bipyridine in a mixture of ethanol and water. In the hydrogen-bonded frameworks of 1 and 2, the one-dimensional polymeric chains of {[M(4,4′-bpy)(H2O)4]2+}n (M = Co, Ni), the 6-oxonicotinate anions and the lattice water molecules were assembled via strong intermolecular O–H···O and N–H···O hydrogen bonds and π–π interactions, leading to the formation of the representative hydrogen-bond ring motifs: trimeric R23(10) motif, the centrosymmetric tetrameric R24(8) and R24(12) motifs and the pentameric R45(12) motif. The isostructural coordination polymers 1 and 2 exhibited a different electrochemical behavior, as observed by cyclic voltammetry, which can be attributed to the nature of the metal ions (cobalt(II) vs. nickel(II)).

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49

Chen, Quan-Li, Xian-Wen Wang, Yong-Hua Zhang, and Jing-Zhong Chen. "Structure and Magnetic Properties of a Single-strand Helical Cobalt(II) Coordination Polymer." Zeitschrift für Naturforschung B 64, no. 3 (2009): 335–38. http://dx.doi.org/10.1515/znb-2009-0315.

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The one-dimensional helical chain-like coordination polymer [Co(bpdc)(H2O)3]・H2O (1) has been synthesized by hydrothermal reaction of pdon with Co(NO3)2・6H2O and Na2B4O7 (bpdc = 2,2ʹ-bipyridyl-3,3ʹ-dicarboxylate, pdon = 1,10-phenanthroline-5,6-dione). 1 crystallizes in the monoclinic space group P21/n with the cell parameters: a = 9.987(1), b = 9.238(1), c = 16.080(2) Å, β = 97.471(1)°, V = 1471.0(3) Å3, Z = 4. The bpdc ligand has resulted from an in situ carbon-carbon bond cleavage in the pdon ligand. The Co(II) atom is surrounded by two nitrogen atoms of the bpdc pyridyl groups and four O atoms, of which three belong to coordinated water molecules and one to a bpdc carboxylate group. The six-coordinated Co(II) atom adopts a distorted octahedral geometry. Compound 1 displays antiferromagnetic interactions. Above 30 K, χm −1 obeys the Curie- Weiss law with C = 3.12 cm3 K mol−1 andΘ = −10.6 K.

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50

Ma, Xiaohui, Yaru Liu, Weiming Song, et al. "A difunctional azido-cobalt(ii) coordination polymer exhibiting slow magnetic relaxation behaviour and high-energy characteristics with good thermostability and insensitivity." Dalton Transactions 47, no. 35 (2018): 12092–104. http://dx.doi.org/10.1039/c8dt02335b.

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As a difunctional material, an azido-Co(ii) coordination polymer with a high-nitrogen content exhibits both molecule-based magnetic behaviour and high-energy performance with superior thermostability and insensitivity.

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