Ruthenium red interaction with alumina surface—FT-IR/PAS studies

Ryczkowski, J.

doi:10.1016/j.vibspec.2003.11.014

Cited by 8 publications

(2 citation statements)

References 55 publications

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“…The infrared and resonance Raman spectra of Ru-red have been analyzed in close correlation with the structural proposals. 33,40,51,56 The strongest bands in the DRIFT spectrum (Figure 4, black) correspond to the ν as NH 3 and ν s NH 3 modes, welldefined at 3242 and 3167 cm -1 , respectively, followed by the δ s NH 3 bands, at 1300 and 1047 cm -1 . The δ as NH 3 mode appears at 1612 cm -1 .…”

Section: Effects Of Encapsulation On the Ru Complexesmentioning

confidence: 99%

Interactions between DNA Purines and Ruthenium Ammine Complexes within Nanostructured Sol−Gel Silica Matrixes

Lopes¹,

García

Brogueira

et al. 2010

J. Phys. Chem. B

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The interactions between DNA purines (guanine and adenine) and three ruthenium ammine complexes (hexaammineruthenium(III) chloride, hexaammineruthenium(II) chloride, and ruthenium-red) were studied in a confined environment, within sol-gel silica matrixes. Two encapsulation methods were rehearsed (differing in temperature and condensation pH), in order to analyze the effects of the sol-gel processes on the purines and on the Ru complexes separately. The extent of decomposition of the Ru complexes, as well as the interactions established with the purine bases, proved to be determined by the coencapsulation method. Combined results by diffuse reflectance UV-vis and infrared spectroscopies showed that, when coencapsulation is carried out at 60 degrees C, specific H bonding interactions are established between the amine group of Ade and the ammine groups of the Ru complex or the hydroxo group of an early decomposition product. These are responsible for the important role of the purine in inhibiting the oxidation reactions of the Ru(II) and Ru(III) complexes. In contrast, Gua establishes preferential H bonds with the matrix (mainly due to the carbonyl group), leading to higher yields in the final oxidation products of the Ru complexes, namely, trimers and dimers. Direct covalent bonding of either purine to the metal was not observed.

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Section: Effects Of Encapsulation On the Ru Complexesmentioning

confidence: 99%

Interactions between DNA Purines and Ruthenium Ammine Complexes within Nanostructured Sol−Gel Silica Matrixes

Lopes¹,

García

Brogueira

et al. 2010

J. Phys. Chem. B

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“…Brown et al have utilized several methods of sample preparation and FT-IR analysis techniques (including PAS) for the observation of a sorption interaction between a clay mineral and an organo-phosphonate [103]. FT-IR/PAS technique has been successfully applied for the studies of ethylenediaminetetraacetic acid (EDTA) and its derivatives interaction with the inorganic oxides surface [104][105][106][107][108][109]. Another unique application of this technique is for studies of MCM-41 template removal or its modification [110][111][112].…”

Section: Spectroscopic Investigationsmentioning

confidence: 99%