Studies on Magnetic and Dielectric Properties of Antiferromagnetically Coupled Dinuclear Cu(II) in a One-Dimensional Cu(II) Coordination Polymer

Jana, Srikanta; Ray, Apurba; Chandra, Angeera; Fallah, M. Salah El; Das, Sachindranath; Sinha, Chittaranjan

doi:10.1021/acsomega.9b02650

Cited by 13 publications

(6 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…55 K, and then χ M T decreases sharply, giving a minimum value of 0.753 cm 3 K mol –1 at 2 K (Figure ). The drop in χ M T at low temperature (<50 K) indicates the presence of a very weak antiferromagnetic coupling between the copper(II) ions . The 1/χ M curve in the range 2–50 K (Figure S10) obeys the Curie–Weiss law with the negative Weiss constant Θ = −1.22 K.…”

Section: Resultsmentioning

confidence: 96%

A Cu(II) Metal Organic Framework with a Tetranuclear Core: Structure, Magnetism, and Supercapacitor Activity

Jana

Saha

Chandra

et al. 2022

Crystal Growth & Design

Self Cite

View full text Add to dashboard Cite

A Cu(II) coordinated metal–organic framework, {[Cu4(BTC)2(4-APy)2(μ3-OH)2]·[(CH3OH)0.5]2·(H2O)2} n (Cu-MOF), has been synthesized by the solvo-diffusion of Cu(NO3)2 to an alcoholic solution of 4-aminopyridine (4-APy) and 1,3,5-benzenetricarboxylic acid (H3BTC) in equimolar proportion. A single-crystal X-ray structure determination suggests that the four-Cu(II)-connected motif ([CuII]4) via edge sharing of two Cu3–O cores and bridging by six acetato functions of the BTC3– connector generates two five-coordinated distorted-square-pyramidal CuO5 units and two distorted-square-planar CuO4 units; the Cu(II) knot in the latter one (CuO4) is coordinated by pyridyl-N of 4-APy. The remaining donor centers of acetato-O of BTC3– bind adjacent [CuII]4 core to form an infinite 3D network structure. The coordination of CH3OH and H2O forms different hydrogen bonds to make a strong superstructure. A surface morphology determination shows a nanoflower pattern. The hybrid material Cu-MOF exhibits a very high specific capacitance, 547 F g–1, at a scan rate of 2 mV s–1 with excellent recycling stability (retains 97.4% after 5000 cycles). The χM T value for Cu-MOF at 300 K is 1.735 cm3 mol–1 K for four copper(II) ions, which is as expected for four isolated copper(II) ions with g = 2.15. The χM T values are almost constant until ca. 55 K, and then χM T decreases sharply, giving a minimum value of 0.753 cm3 K mol–1 at 2 K.

show abstract

Section: Resultsmentioning

confidence: 96%

A Cu(II) Metal Organic Framework with a Tetranuclear Core: Structure, Magnetism, and Supercapacitor Activity

Jana

Saha

Chandra

et al. 2022

Crystal Growth & Design

Self Cite

View full text Add to dashboard Cite

show abstract

“…The bond lengths and bond angles of compounds 1 and 2 are listed in Tables S2 and S3. These complexes are capable of forming higher dimensional structures through various classical and nonclassical supramolecular (van der Waals, aliphatic, aromatic C–H−π) interactions (3.066–3.454 Å (Figures a–c and b,c). − Compound 1 crystallizes in the monoclinic C 12/ c 1 space group, with Z = 8, whereas 2 crystallizes in the monoclinic P 21 /c space group, with Z = 4 (Table S1).…”

Section: Resultsmentioning

confidence: 99%

Tetrameric and Polymeric Zn(II) Coordination Complexes of 4-Diallylaminobenzoic Acid and Their Applications in the Electroreduction of CO₂ and Schottky Diode Behavior

Jana

Datta

Maity

et al. 2021

Crystal Growth & Design

Self Cite

View full text Add to dashboard Cite

Electrochemical reduction of CO 2 into C-fuels using metal and metal oxides nanoparticles, molecular complexes, etc. is a challenging task in view of a sustainable environment, renewable energy sources, and transformation of waste-to-wealth. Zn(II), d 10 redoxinnocent coordination complexes have recently been used as efficient and selective catalysts in the electroreduction of CO 2 . Toward this goal, we have synthesized two complexes, tetranuclear (0D) [Zn 4 (μ 4 -O)(DABA) 6 ] (1) and polynuclear (1D) [Zn 2 (DABA) 4 (4,4′-BPY)] n (2), in one pot (HDABA = 4-diallylamino-benzoic acid and 4,4′-BPY = 4,4′-bipyridine) and characterized them by single-crystal X-ray diffraction measurements and other spectroscopic data. The electroreduction of CO 2 (CO 2 RR) using complexes 1 and 2 as catalysts produced HCOOH, HCHO, and CH 3 OH. The reduced products are identified by 13 C NMR spectral data. It is observed that compound 1 is catalytically more efficient than compound 2; when compound 1 demonstrates the current −5.63 mA mg −1 , compound 2 shows a much lower value (−22.27 mA mg −1 ). Impedance spectroscopy shows that in complex 2, Z′ decreases with a diminishing frequency compared to that of complex 1; this implies that the dc resistivity of 2 is lower than that of 1. The theoretically calculated energy gap values (ΔE(HOMO−LUMO)) are 4.4 eV (1) and 2.81 eV (2), and the conductivity is 2.29 × 10 −7 S/m (1) and 2.54 × 10 −3 S/m (2). About 10 4 times enhancement of conductivity of 2 is due to not only coordination of 4,4′-BPY to Zn(II) but also to subsidization by the coordination polymer and noncovalent superstructure.

show abstract

“…Recently, CPs/MOFs have been employed in multifunctional eld of applications: gas sorption, separation, catalysis, sensing, electrochemistry, electrical conductivity, magnetism and biology etc. [13][14][15][16][17][18][19][20][21][22][23][24][25] And hence, these molecular system acts as the active member in the club of material science. Chemistry, a most democrative disciplene, serves all the research eld along with material seience, engineering & technology, through the syntheses and designing of diverse chemical compounds and exploration of their application elds.…”

Section: Introductionmentioning

confidence: 99%

Fish-bone like Cd(II)-1D coordination polymer: Structural elucidation and theoretical Study

Ghosh

Bhunia

Saha

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

{[Cd(5-NIPA)2(PBT)2]}n (1) [5-H2NIPA = 5-nitroisophthalic acid, PBT= 2-pyridin-4-ylbenzothiazole], 1D Coordination Polymer (1D-CP), has been synthesised and characterized by single crystal X-ray crystallography. The 1D polymeric structure of 1 is constructed by carboxylato bridging of NIPA2- where two -COO- binds in two different fashion – one is chelated while other bridges two neighbouring Cd(II) centres forming a six-membered dinunclear metallacycle. 1D chains self-assembled via H-bonding and π×××π interaction to construct a supramolecular aggregate. The Hirshfeld surface analysis also supports the persistence of different weak interactions in the compound. To get future prospects and electronic nature of compound 1 the DFT (Density Functional Theory) computation using crystallographic parameters has been performed. From the calculation it is observed that the energy difference between HOMO and LUMO is 0.29 eV. This may be an indication about the future applicability of 1 as a semiconducting material. The photo-physical properties are also investigated to understand the chemical nature of the polymeric network.

show abstract

Studies on Magnetic and Dielectric Properties of Antiferromagnetically Coupled Dinuclear Cu(II) in a One-Dimensional Cu(II) Coordination Polymer

Cited by 13 publications

References 49 publications

A Cu(II) Metal Organic Framework with a Tetranuclear Core: Structure, Magnetism, and Supercapacitor Activity

A Cu(II) Metal Organic Framework with a Tetranuclear Core: Structure, Magnetism, and Supercapacitor Activity

Tetrameric and Polymeric Zn(II) Coordination Complexes of 4-Diallylaminobenzoic Acid and Their Applications in the Electroreduction of CO₂ and Schottky Diode Behavior

Fish-bone like Cd(II)-1D coordination polymer: Structural elucidation and theoretical Study

Contact Info

Product

Resources

About

Studies on Magnetic and Dielectric Properties of Antiferromagnetically Coupled Dinuclear Cu(II) in a One-Dimensional Cu(II) Coordination Polymer

Cited by 13 publications

References 49 publications

A Cu(II) Metal Organic Framework with a Tetranuclear Core: Structure, Magnetism, and Supercapacitor Activity

A Cu(II) Metal Organic Framework with a Tetranuclear Core: Structure, Magnetism, and Supercapacitor Activity

Tetrameric and Polymeric Zn(II) Coordination Complexes of 4-Diallylaminobenzoic Acid and Their Applications in the Electroreduction of CO2 and Schottky Diode Behavior

Fish-bone like Cd(II)-1D coordination polymer: Structural elucidation and theoretical Study

Contact Info

Product

Resources

About

Tetrameric and Polymeric Zn(II) Coordination Complexes of 4-Diallylaminobenzoic Acid and Their Applications in the Electroreduction of CO₂ and Schottky Diode Behavior