Di-aqua-bridged dinuclear Cu(II) isonicotinate adducts using 2,2′-bipyridine and 1,10-phenanthroline

Thatipamula, Krishna Chary; Bhargavi, G.; Rajasekharan, M. V.

doi:10.1016/j.poly.2015.05.027

Cited by 3 publications

(6 citation statements)

References 28 publications

(21 reference statements)

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“…2B indicates the 'half-filled' forbidden transition. 21 Thus the typical ESR signal confirmed the +2 oxidation state of copper in the complex and supported the nuclearity and structure of the synthesized copper(II) complex.…”

Section: Esr Spectroscopysupporting

confidence: 66%

“…The spectrum is typical of dinuclear copper(II) complexes in triplet state 21 showing partially resolved hyperfine splitting with g ⊥ values 2.23603 and 1.95253 indicating dimeric structure for the Iqbal et al: Dinuclear Ternary Copper(II) Complex: ... complex in solid state. 21,22 The low field spectrum shown in Fig. 2B indicates the 'half-filled' forbidden transition.…”

Section: Esr Spectroscopymentioning

confidence: 96%

“…The decrease in absorbance as a result of DNA addition gave the basis for quantitative affinity of copper(II) complex for DNA by calculating its binding constant K b using the famous Benesi-Hildebrand equation 49 (equation 3.4): (4) where A and A o are the absorbance of the complex in the presence and absence of DNA while ε H-G and ε G are their absorption coefficients, respectively. The ratio of slope to intercept of the plot of the term on the left-hand side of equation 3.4 vs. 1/[DNA] gives K b as shown in Fig.…”

Section: Dna Study Through Absorption Spectroscopymentioning

confidence: 99%

“…2 Another common bridging group in binuclear copper(II) complexes is chlorine 3 where the di-chloro-bridged dinuclear complexes with 2,2ʹ-bipyridine were found catalytically more active than their mono-nuclear analogue. 3 Some complexes contain water molecules bridging the two copper(II) centers 4 where the weaker super-exchange interactions in analogues containing 1,10-phenanthroline and 2,2ʹ-bipyridine have been attributed to the diauqa bridges.…”

Section: Introductionmentioning

confidence: 99%

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Dinuclear Ternary Copper(II) Complex: Synthesis, Characterization, Structure and DNA-Binding Studies

Iqbal

Mushtaq

Ali

et al. 2018

ACSi

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A dinuclear centrosymmetric copper(II) complex has been prepared and characterized via FT-IR, UV-Visible and electron spin resonance spectroscopy, electrochemical method, and powder and single crystal XRD techniques. The two copper(II) ions are connected by two μ-1,1-O atoms belonging to para-fluorophenyl acetate ligands. Each copper(II) ion is coordinated by two other carboxylate ligands in monodentate and a 2,2ʹ-bipyridine molecule in bidentate manner. Thus the geometry around each penta-coordinated copper(II) ion is square pyramidal with distortion factor τ = 0.04. Purity and uniform crystalline nature of the complex was assessed from powder XRD spectrum. ESR signal consisted of partially resolved hyperfine splitting pattern while electrochemical studies revealed diffusion controlled electron transfer processes with diffusion coefficient of 1.628 × 10-7 cm 2 s-1. The results of all spectroscopic experiments support each other. The complex afforded mixed binding mode with DNA yielding DNA-binding constant values of 3.667 × 10 4 and 1.438 × 10 4 M-1 using cyclic voltammetry and absorption spectroscopy, respectively. The preliminary studies heralded good structural and biological importance of the synthesized complex.

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Section: Esr Spectroscopysupporting

confidence: 66%

Section: Esr Spectroscopymentioning

confidence: 96%

Section: Dna Study Through Absorption Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dinuclear Ternary Copper(II) Complex: Synthesis, Characterization, Structure and DNA-Binding Studies

Iqbal

Mushtaq

Ali

et al. 2018

ACSi

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“…The ESR spectrum is typical of other octahedral copper(II) complexes . The ESR spectrum of complex 2, as shown in Figure b, is similar to other copper(II) complexes with partially resolved hyperfine splitting, with g ┴ values of 2.06161 2.24623 and 1.94959 . The ESR spectrum supports the dinuclear nature of the copper(II) complex.…”

Section: Resultsmentioning

confidence: 98%

Mononuclear vs. binuclear carboxylates of copper(II) with 2,2′‐bipyridine: Synthesis, characterization, structural description, and properties

Iqbal

Ali

Sohail³

et al. 2019

J Chinese Chemical Soc

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Two new copper(II) carboxylate complexes with 2,2′‐bipyridine and para‐nitrophenyl acetate (complex 1) and phenyl acetate (complex 2) have been synthesized; isolated in quantitative yield; and characterized using fourier‐transform infrared spectroscopy (FT‐IR), electron paramagnetic resonance, absorption spectroscopy, electrochemistry, and powder and single crystal X‐ray diffraction (XRD) techniques. Being mononuclear, the geometry around copper in complex 1 is a Jahn–Teller distorted octahedral, while complex 2 is binuclear with slightly distorted square pyramidal geometry around both copper ions. Powder XRD indicated several peaks in spectra of both complexes, which coincided with their theoretical spectra. FT‐IR results of the carboxylate stretching frequency were in accordance with the single crystal structure data. Electron paramagnetic resonance spectra of complexes 1 and 2 yielded g┴ values of 2.06161 and 2.24623 and 1.94959, respectively, indicating a localized electron in b1 (d x2–y2‐orbital). Ultra‐violet (UV)–visible spectroscopy and electrochemistry helped in characterization, as well as in deoxyribonucleic acid (DNA)‐binding ability of the complexes, yielding DNA‐binding constant values = 1.351 × 104 and 1.361 × 104 and 1.820 × 104 and 2.426 × 104 M−1, respectively, for complexes 1 and 2. The complexes demonstrate good biological potential.

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Crystal structure and void analysis of tris(2-amino-1-methylbenzimidazolium) hexakis(nitrato-κ² O,O′)lanthanate(III)

Ruzieva¹,

Kunafiev

Kadirova

et al. 2022

Acta Cryst E

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The organic–inorganic complex salt, (C8H10N3)3[La(NO3)6], comprises a network of N-protonated 2-amino-1-methylbenzimidazolium cations and hexakis(nitrato)lanthanate(III) anions. The LaIII atom is twelve-coordinate within a distorted icosahedral environment. In the unit cell, each pair of the LaIII atoms lie nearly on one of the crystallographic glide planes. In the crystal structure, there are several N—H...O hydrogen-bonding interactions between the cations and terminal oxygen atoms from the nitrate moieties of the [La(NO3)6]3– anion. Additional weak C—H...O hydrogen bonds between the cations and anions consolidate the three-dimensional arrangement of the structure. A packing analysis was performed to check the strength of the crystal packing.

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Di-aqua-bridged dinuclear Cu(II) isonicotinate adducts using 2,2′-bipyridine and 1,10-phenanthroline

Cited by 3 publications

References 28 publications

Dinuclear Ternary Copper(II) Complex: Synthesis, Characterization, Structure and DNA-Binding Studies

Dinuclear Ternary Copper(II) Complex: Synthesis, Characterization, Structure and DNA-Binding Studies

Mononuclear vs. binuclear carboxylates of copper(II) with 2,2′‐bipyridine: Synthesis, characterization, structural description, and properties

Crystal structure and void analysis of tris(2-amino-1-methylbenzimidazolium) hexakis(nitrato-κ² O,O′)lanthanate(III)

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Di-aqua-bridged dinuclear Cu(II) isonicotinate adducts using 2,2′-bipyridine and 1,10-phenanthroline

Cited by 3 publications

References 28 publications

Dinuclear Ternary Copper(II) Complex: Synthesis, Characterization, Structure and DNA-Binding Studies

Dinuclear Ternary Copper(II) Complex: Synthesis, Characterization, Structure and DNA-Binding Studies

Mononuclear vs. binuclear carboxylates of copper(II) with 2,2′‐bipyridine: Synthesis, characterization, structural description, and properties

Crystal structure and void analysis of tris(2-amino-1-methylbenzimidazolium) hexakis(nitrato-κ2 O,O′)lanthanate(III)

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Crystal structure and void analysis of tris(2-amino-1-methylbenzimidazolium) hexakis(nitrato-κ² O,O′)lanthanate(III)