Synthesis, spectroscopic and thermal studies of the copper(II) aspartame chloride complex

Çakır, Semiha; Coşkun, Emine; Naumov, Panče; Bíçer, Ender; Bulut, İclal; İçbudak, Hasan; Çakir, Osman

doi:10.1016/s0022-2860(01)00939-5

Cited by 35 publications

(3 citation statements)

References 16 publications

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“…21 Moreover, the asymmetric stretching and the symmetric stretching vibrations of COOgroup has been shifted down to 1512 cm -1 , 1513 cm -1 and 1435 cm -1 , 1402 cm -1 , respectively, which confirms the bonding of the metal ions by the carboxylato oxygen atom. 22 This is further support- ed by the presence of Mn-N, Fe-N and Mn-O, Fe-O bands at 423 cm -1 , 435 cm -1 and 547 cm -1 , 528 cm -1 , respectively. 23 The -OH stretching vibrations exhibits broad band at 3423 cm -1 and 3200 cm -1 for the MnL and FeL complexes, respectively.…”

Section: Ftir Spectramentioning

confidence: 62%

Evaluation of DNA/BSA Binding and Chemical Nuclease Activity of L-Tyrosine-Based Mn(III) and Fe(III) Metallo-Intercalators

Bennie¹,

Chellappa²,

Solomon³

et al. 2019

ACSi

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A novel class of Mn(III) and Fe(III) complexes of L-tyrosine-based ligand has been synthesized and characterized through various analytical and spectroscopic techniques. These complexes were found to exhibit efficient binding properties with the biomolecules viz. calf thymus DNA and BSA. The ability of complexes to bind with such biomolecules has been explored through absorption, emission and viscosity measurements. Based on spectroscopic techniques we can conclude that the complexes could bind to DNA via intercalation. It was observed that these complexes can cleave pBR322 DNA in gel-electrophoresis technique through oxidative mechanism. The BSA was quenched by the complexes around 340 nm adopting a mechanism of static mode. The binding constants, thermodynamic parameters and the donor to acceptor distance were calculated. Besides, molecular docking simulations were carried out for the complexes with human DNA topoisomerase and BSA protein. The docked poses are visualized to provide supportive evidence to the interaction of the synthesized complexes with DNA/BSA.

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Section: Ftir Spectramentioning

confidence: 62%

Evaluation of DNA/BSA Binding and Chemical Nuclease Activity of L-Tyrosine-Based Mn(III) and Fe(III) Metallo-Intercalators

Bennie¹,

Chellappa²,

Solomon³

et al. 2019

ACSi

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“…In our previous paper [7], we have observed that this band is located at 1680, 1687 and 1693 cm -1 in the infrared spectra of nicotinamide adducts of Co(II), Ni(II) and Zn(II) chlorides. Bearing this in mind, the highest-frequency of the bands in the v (CO) region, at 1620 cm -1 , could be tentatively attributed to the nicotinamide carbonyl stretching mode, shifted to lower frequencies upon conjugation of the CO group the pyridine ring and/or hydrogen bonding [9].…”

Section: Infrared Spectra and Spectra-structure Correlationsmentioning

confidence: 74%

“…As can be seen in figure 1, two strong, overlapped and apparently complex bands are present between 3700 and 2900 cm -1 , where bands are due to XH (X=O, N) stretchings. The band frequencies of the XH stretchings (3440/3349 cm -1 ) imply that the XH groups in the complex participate in hydrogen bonds [7]. The region of the NH 2 stretching vibrations is relatively broadened by partial superposition with the O-H vibrations of the coordinated water molecules.…”

Section: Infrared Spectra and Spectra-structure Correlationsmentioning

confidence: 98%

Structural features of a new [Fe(nicotinamide)2(H2O)4]·[Fe(H2O)6]·(SO4)2·2H2O complex

Çakır¹,

Bíçer

Aoki

et al. 2006

Cryst. Res. Technol.

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Identification and characterisation of the E951 artificial food sweetener by vibrational spectroscopy and theoretical modelling

Peica¹

2009

J Raman Spectroscopy

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Aspartame (E951), a very well-known dipeptide sweetener, approximately 150-200 times sweeter than sugar, is widely used in a variety of applications, especially in soft drinks. A drawback of E951 is its relatively low stability at high pH values and at high temperatures, thereby limiting its use. The changes observed in the very strong bands from the 1600-1300 cm −1 spectral region, characteristic to the υ(CO) mode coupled with the NH bending mode, allows to establish the species present in the Raman and SERS solutions at different concentrations and pH values. More exactly, a molecule protonation at the amino group was detected on going from basic to acidic pH values. The DFT calculated geometry, harmonic vibrational modes and Raman scattering activities of E951 were in good agreement with the experimental data and helped establish its SERS behaviour on silver surfaces. According to the DFT calculations performed, E951 can give rise to an intramolecular hydrogen bonding network, with lengths in the same range as the hydrogen bonds in the peptide unit moieties.

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Synthesis, spectroscopic and thermal studies of the copper(II) aspartame chloride complex

Cited by 35 publications

References 16 publications

Evaluation of DNA/BSA Binding and Chemical Nuclease Activity of L-Tyrosine-Based Mn(III) and Fe(III) Metallo-Intercalators

Evaluation of DNA/BSA Binding and Chemical Nuclease Activity of L-Tyrosine-Based Mn(III) and Fe(III) Metallo-Intercalators

Structural features of a new [Fe(nicotinamide)2(H2O)4]·[Fe(H2O)6]·(SO4)2·2H2O complex

Identification and characterisation of the E951 artificial food sweetener by vibrational spectroscopy and theoretical modelling

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