Spectral and redox models for blue copper proteins: copper(II) complexes of β-diketonimines from a Knoevenagel condensate

Jeyasubramanian, K.; Thambidurai, S.; Ramalingam, S.; Murugesan, R.

doi:10.1016/s0162-0134(98)10059-4

Cited by 25 publications

(15 citation statements)

References 21 publications

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“…The ESR spectral parameter of Cu(II) in complex has tetra hedral geometry around Cu(II) ions. These data are well consistent with other reported values [43]. …”

Section: Electron Spin Resonance (Esr) Spectrasupporting

confidence: 94%

Synthesis, Characterization and Anticorrosion Studies of New Homobimetallic Co(II), Ni(II), Cu(II), and Zn(II) Schiff Base Complexes

et al. 2015

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New homobinuclear Co(II), Ni(II), Cu(II), and Zn(II) complexes with Schiff base (H 2 L,1) have been synthesized and investigated using physicochemical techniques viz. IR, 1 H NMR, 13 C NMR, ESR, UV-Visible spectrometric methods, thermal gravimetric analysis, and magnetic moment measurements. The corrosion inhibition studies of the compounds on mild steel in (0.5 M) HCl have been investigated by weight loss, potential dynamics polarization, and scanning optical microscope. The adsorption of compounds was founded to obey the Langmuir adsorption isotherm model showing mixed type inhibition behavior. The in vitro antibacterial studies of the complexes against sulfate-reducing bacteria proved them as growth inhibiting agents.

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“…The ESR spectral parameter of Cu(II) in complex has tetra hedral geometry around Cu(II) ions. These data are well consistent with other reported values [43]. …”

Section: Electron Spin Resonance (Esr) Spectrasupporting

confidence: 94%

Synthesis, Characterization and Anticorrosion Studies of New Homobimetallic Co(II), Ni(II), Cu(II), and Zn(II) Schiff Base Complexes

et al. 2015

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“…The electrochemical data are given in Table 3. All these complexes show one well-defined redox couple corresponding to copper(II/I), as expected [18]. The cathodic peak appearing in the positive potential of 502-138 mV range corresponds to the one electron reduction of copper(II) and the corresponding anodic peak also appears in the 430-640 mV positive potential region.…”

Section: Electrochemical Behavioursupporting

confidence: 81%

Synthesis, spectra and redox behavior of copper(II) complexes of curcumin diketimines as models for blue copper proteins

Annaraj

Ponvel

Athappan

et al. 2004

Transition Metal Chemistry

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Several new Cu II complexes, having positive reduction potentials in an in situ manner, were synthesized by reaction of the Knoevenagel condensate, 4-salicylidene-1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione (from curcumin) with 4-X-anilines and CuCl 2 . The solution electronic spectra of these complexes show intense absorption around 530 nm with unusual high extinction values (e, 1600-3600 M À1 cm À1 ) due to the low symmetry Lp-dp (Cu) LMCT transition. The e.s.r. spectral features with g jj > g^> 2.0 having four g jj values and a broadening of the gĉ omponent with moderately low A jj (110 · 10 À4 cm À1 ) also suggest a lower symmetry around Cu II . The cyclic voltammetric studies of the Cu II complexes in MeCN show a positive reduction potential (E pc ¼ 502-138 mV) with high peak-to-peak separation (DE p ¼ 87-335 mV). The higher e and low A jj values together with positive reduction potentials for these Cu II complexes suggest that they can mimic the functional properties of blue copper proteins, but have poor redox stability.

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“…The electrochemical data are given in Table 2. All these complexes show one well-defined redox couple corresponding to copper(II)/copper(I), as expected [17]. The measured ΔEp values (85-340 mV) clearly indicate that these redox couples are quasireversible.…”

Section: Electrochemical Behavioursupporting

confidence: 79%

Synthesis, Characterization, Electrochemical Behaviour, DNA Binding and Cleavage Studies of Substituted β-DiketimineCopper(II) and Zinc(II) Complexes

Jeyamurugan¹

2015

IJIRSET

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Several novel copper(II) and zinc(II) complexes have been synthesized from Schiff base(s) obtained by the condensation of Knoevenagel condensate, 3-(3-phenyl-allylidene)-pentane-2,4-dione with p-substituted (X) aniline where X = -NO 2 (L 1 ), -H (L 2 ), -OH (L 3 ) and -OCH 3 (L 4 )] and, copper(II) chloride/zinc(II) chloride. They have been characterized by analytical and spectral techniques. Electronic absorption and electrochemicalmeasurements prove that the complexes intercalate into DNA. Control DNA cleavage experiments using pUC19 supercoiled (SC) DNA and minor groove binder (distamycin) suggest the minor groove binding tendency for the synthesized complexes.

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Spectral and redox models for blue copper proteins: copper(II) complexes of β-diketonimines from a Knoevenagel condensate

Cited by 25 publications

References 21 publications

Synthesis, Characterization and Anticorrosion Studies of New Homobimetallic Co(II), Ni(II), Cu(II), and Zn(II) Schiff Base Complexes

Synthesis, Characterization and Anticorrosion Studies of New Homobimetallic Co(II), Ni(II), Cu(II), and Zn(II) Schiff Base Complexes

Synthesis, spectra and redox behavior of copper(II) complexes of curcumin diketimines as models for blue copper proteins

Synthesis, Characterization, Electrochemical Behaviour, DNA Binding and Cleavage Studies of Substituted β-DiketimineCopper(II) and Zinc(II) Complexes

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