Structures and vibrational spectra of indolecarboxylic acids. Part II. 5-Methoxyindole-2-carboxylic acid

Morzyk-Ociepa, Barbara; Michalska, Danuta; Pietraszko, A.

doi:10.1016/j.molstruc.2003.09.029

Cited by 28 publications

(23 citation statements)

References 14 publications

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“…In our previous papers, in Parts I and II, the crystal and molecular structure of indole-2-carboxylic acid (I2CA) and of its derivative 5-metoxyindole-2-carboxylic acid (5-MeOI2CA) have been reported [15,16]. In Part III we studied diamminetetrakis (m-indole-3-carboxylato-O,O 0 )dicopper(II) complex (Cu-I3CA) by single crystal X-ray diffraction analysis, EPR and infrared spectroscopic methods and the density functional calculations of the vibrational spectra for O-deprotonated indole-3-carboxylic acid [17].…”

Section: Introductionmentioning

confidence: 99%

X-ray and vibrational spectra on metal complexes with indolecarboxylic acids

Morzyk-Ociepa

Marciniak

2007

Vibrational Spectroscopy

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Section: Introductionmentioning

confidence: 99%

X-ray and vibrational spectra on metal complexes with indolecarboxylic acids

Morzyk-Ociepa

Marciniak

2007

Vibrational Spectroscopy

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“…Fourier Transform Infrared (FTIR) Analysis. 47 whereas in the FTIR spectrum of 5H-I2CA@AgNPs, a peak shift from 1693 to 1600 cm −1 and the disappearance of a peak at 1190 cm −1 indicate the involvement of carboxylic group in the NPs preparation (Figure S4b). In alkaline medium, AgNO 3 acted as an oxidizing agent, which showed oxidative decarboxylation of 5H-I2CA forming an indole cation.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

“…The peak at 3128 cm –1 arises due to the stretching vibration of OH group involved in intermolecular hydrogen bonding. The peaks at 1693 and 1190 cm –1 are due to the C=O and C–O stretching vibrations in the carboxylic group, respectively, 47 whereas in the FTIR spectrum of 5H-I2CA@AgNPs, a peak shift from 1693 to 1600 cm –1 and the disappearance of a peak at 1190 cm –1 indicate the involvement of carboxylic group in the NPs preparation (Figure S4b). In alkaline medium, AgNO 3 acted as an oxidizing agent, which showed oxidative decarboxylation of 5H-I2CA forming an indole cation.…”

Section: Resultsmentioning

confidence: 99%

Selective Interactions of Al(III) with Plasmonic AgNPs by Colorimetric, Kinetic, and Thermodynamic Studies

2019

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In this paper, we report a simple, novel, and highly selective plasmonic nanoparticles (NPs)-based colorimetric nanoprobe for the detection of Al(III) ions in aqueous solution. 5-Hydroxy indole-2-carboxylic acid (5H-I2CA) was utilized as a reducing as well as capping agent for the preparation of silver nanoparticles (5H-I2CA@AgNPs). The interaction between Al(III) and AgNPs was determined by UV–vis absorption spectroscopy, high-resolution transmission electron microscopy, Fourier transform infrared, X-ray photoelectron spectroscopy, and dynamic light scattering techniques. The absorption values ( A 452–410 ) of the 5H-I2CA@AgNPs solution exhibited a linear correlation with Al(III) ion concentrations within the linear range of 0.1–50 nM. An outstanding selectivity toward Al(III) was demonstrated by the proposed nanoprobe in the presence of interfering cations. Kinetics was used to study the selectivity of nanoprobe, which indicated second-order kinetics, and the rate constant was very high. The activation energies of Al(III) were found to be the lowest compared to those of other interfering ions. The results of kinetics and thermodynamic study of Al(III) were compared to those of four other competing ions. The thermodynamic data reveal that the interaction best suited for Al(III) ion compared to other metal ions (Al(III) > Co(II) > Hg(II) > Cr(III) ≅ Cr(VI)). The lower detection limit of the proposed nanoprobe for Al(III) is 1 nM. The present method also holds practical applicability for real water samples.

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“…In this work, we continue the studies on the synthesis and vibrational spectra of indolecarboxylic acids and their metal complexes [20][21][22][23][24][25]. In this paper, the [Zn(I2CA) 2 (H 2 O) 2 ] n is examined using single crystal X-ray diffraction analysis.…”

Section: Introductionmentioning

confidence: 99%

Structures and vibrational spectra of indolecarboxylic acids. Part II. 5-Methoxyindole-2-carboxylic acid

Cited by 28 publications

References 14 publications

X-ray and vibrational spectra on metal complexes with indolecarboxylic acids

X-ray and vibrational spectra on metal complexes with indolecarboxylic acids

Selective Interactions of Al(III) with Plasmonic AgNPs by Colorimetric, Kinetic, and Thermodynamic Studies

X-ray diffraction and vibrational spectroscopic studies of indolecarboxylic acids and their metal complexes

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