Characterization studies of adenine complexes with 3d metal perchlorates

SPECA, A. N.; Mikulski, Chester M.; Iaconianni, Frank J.; Pytlewski, L.L.; Karayannis, Nicholas M.

doi:10.1016/0022-1902(81)80615-x

Cited by 64 publications

(8 citation statements)

References 89 publications

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“…(3) The shifting of the band 730 cm -1 to higher wavenumber can be taken as evidence of the formation of the complex of the NH 2 group with the metal surface, because a similar band shifting had also been found in the spectra of the adenine−metal complex …”

Section: Resultsmentioning

confidence: 92%

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Potential Dependence of the Conformations of Nicotinamide Adenine Dinucleotide on Gold Electrode Determined by FT−Near-IR−SERS

Xiao

Markwell

1997

Langmuir

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High-quality Fourier transform surface-enhanced Raman scattering (FT−SERS) of a dilute solution of nicotinamide adenine dinucleotide (NAD) was recorded on a roughened Au electrode. It was found that the detection limit could be lower as much as 3 orders of magnitude by using a near-infrared laser as the exciting source and an in-situ roughening technique. The SERS of NAD shows a strong potential dependence in the non-Faradaic regions. In regions of positive electrode potential, only the bands responsible for the adenine and nicotinamide moieties can be observed. In contrast, with a negative shift of the potential, several additional strong bands representing the ribose and phosphate moieties are also evident. Based upon the SERS behaviors of NAD in the regions of different potential, an adsorption mechanism for dilute NAD on the gold electrode was proposed. With this mechanism, the stacked NAD molecule is considered to be opened to some extent on an electric charged electrode. Specifically, under sufficiently negative potential, the NAD molecule appears to exist in a well-extended state on the gold electrode, leading to the tight adsorption of the entire NAD molecule on the electrode.

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Section: Resultsmentioning

confidence: 92%

“…In addition, the upward shift by several wavenumbers of the band near 730 cm -1 , which was assigned to a totally symmetric ring-breathing vibration of the adenine moiety, implied that this band may mix with the in-plane NH 2 bend 27 and that an adenine−metal complex via −NH 2 may form on the positively charged electrode …”

Section: Resultsmentioning

confidence: 99%

Potential Dependence of the Conformations of Nicotinamide Adenine Dinucleotide on Gold Electrode Determined by FT−Near-IR−SERS

Xiao

Markwell

1997

Langmuir

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“…15 According to Raman analysis, the band at 734 cm −1 in the solid spectrum is not due to just the ring-breathing vibration, but another vibration that was assigned by an IR study of adenine-metal complexes to a coupled NH2 deformation and ring vibration. 24 This frequency was found to changes from 714 to 740 cm −1 depending upon the complex. In this work, the SERS spectrum of N-deuterated dA was recorded to determine if the NH2 vibration is contributed to this assigned vibration.…”

Section: Resultsmentioning

confidence: 93%

The Coordination Chemistry of DNA Nucleosides on Gold Nanoparticles as a Probe by SERS

Jang¹

2002

Bulletin of the Korean Chemical Society

134

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The DNA nucleosides (dA, dC, dG, dT) bound to gold nanoparticles (~13 nm) in aqueous solution has been studied as a probe by the SERS and their coordination structures have been proposed on the basis of them. According to UV-Visible absorption of gold nanoparticles after modifying with DNA nucleosides, the rates of absorption of dA, dC, and dG were much faster than that of dT as monitored by the aggregation kinetics at 700 nm. These data indicated that the nucleosides dA, dC, and dG had a higher affinity for the gold nanoparticles surface than nucleoside dT. As the result of SERS spectra, the binding modes of each of the nucleosides on gold nanoparticles have been assigned. A dA binds to gold nanoparticles via a N(7) nitrogen atom of the imidazole ring, which the C(6)-NH 2 group also participates in the coordination process. In the case of dC, it binds to the gold surface via a N(3) nitrogen atom of the pyrimidine ring with a partial contribution from the oxygen of C(2)=O group. A coordination of dG to the gold surfaces is also proposed. Although the dG has the two different nitrogens of a pyrimidine ring and the amino group, the N(1) nitrogen atom of a pyrimidine ring has a higher affinity after the hydrogen migrates to the amino group. Conversely, dT binds via the oxygen of the C(4)=O group of the pyrimidine ring. Accordingly, these data suggest that the nitrogen atom of the imidazole or the pyrimidine ring in the DNA nucleosides will bind more fast to the gold nanoparticles surfaces than the oxygen atom of the carbonyl group.

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“…However, for divalent cations such as Co 2+ , Pd 2+ , Pt 2+ , and Ti 2+ the N 7 and N 10 coordination sites have been proposed. ,,, Coordination by the amine group is less probable, but there is evidence supporting this coordination in the case of some ruthenium and mercury complexes . The IR spectra of some adenine metal complexes show strong wavenumber shifts of the signal corresponding to the pyrimidine and imidazol ring vibration modes with respect to the ligant signals; this was interpreted as an indication of the implication of the N atoms of the respective rings in coordination. The bands characteristic of the NH 2 group show only slight deviations in the case of the Fe 2+ and Zn 2+ complexes; however in the Co 2+ and Ni 2+ complexes all the bending bands associated to this group are red shifted while the C−NH 2 stretching band is blue-shifted.…”

Section: Discussionmentioning

confidence: 99%

Adenine Adsorption at Single Crystal and Thin-Film Gold Electrodes: An In Situ Infrared Spectroscopy Study

et al. 2009

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Adenine adsorption at gold electrodes is studied in neutral sodium fluoride solutions by cyclic voltammetry and in situ infrared spectroscopy. External reflection measurements were performed with Au(111) and Au(100) single crystal electrodes in D2O solutions, whereas surface enhanced infrared reflection absorption spectroscopy experiments under attenuated total reflection conditions were carried out with sputtered gold thin-film electrodes, both in D2O and H2O solutions. The results clearly show the specific adsorption of the molecule providing significant surface enhancement of the strong ring stretching band and the scissoring mode of the amino group. On the basis of the results, an adsorption model is proposed in which the molecular plane and the C−N(H2) bond are tilted on the electrode surface. Coordination is proposed to take place via the N(amino) atom upon sp3 hybridization and the N7 atom of the ring. The model applies irrespective of the surface crystallographic orientation of the electrode or the applied potential. The influence of the reconstructed or the unreconstructed state of the surface is inferred from the analyses of the spectra recorded while scanning the potential in opposite directions.

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Characterization studies of adenine complexes with 3d metal perchlorates

Cited by 64 publications

References 89 publications

Potential Dependence of the Conformations of Nicotinamide Adenine Dinucleotide on Gold Electrode Determined by FT−Near-IR−SERS

Potential Dependence of the Conformations of Nicotinamide Adenine Dinucleotide on Gold Electrode Determined by FT−Near-IR−SERS

The Coordination Chemistry of DNA Nucleosides on Gold Nanoparticles as a Probe by SERS

Adenine Adsorption at Single Crystal and Thin-Film Gold Electrodes: An In Situ Infrared Spectroscopy Study

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