Spectrophotometric study of the charge-transfer complexes of iodine with antipyrine in organic solvents

Hasani, Masoumeh; Rezaei, Alireza

doi:10.1016/j.saa.2006.02.009

Cited by 55 publications

(17 citation statements)

References 31 publications

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“…3. The concentration of the donor in the reaction mixture was kept greater than that of the acceptor, [D] 0 > [A] 0 [53][54][55] and changed over a wide range of concentration from 0.01 Mol/L to 0.02 Mol/L while concentration of acceptor (PHB) was kept fixed [56] at 0.01 Mol/L. The change of the absorption intensity to higher values for the complex was detected and investigated and given in Table 3.…”

Section: Uv-visible Studies and Determination Of Energy Of Charge-tramentioning

confidence: 99%

Synthesis, spectroscopic studies and thermal analysis of charge-transfer complex of 2,2′-bipyridine with 4-hydroxybenzoic acid in different polar solvents

Rzokee¹,

Ahmad²

2014

Journal of Molecular Structure

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Section: Uv-visible Studies and Determination Of Energy Of Charge-tramentioning

confidence: 99%

Synthesis, spectroscopic studies and thermal analysis of charge-transfer complex of 2,2′-bipyridine with 4-hydroxybenzoic acid in different polar solvents

Rzokee¹,

Ahmad²

2014

Journal of Molecular Structure

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“…Therefore, it is reasonable to consider the extent of the blue shift in iodine band as a measure of the magnitude of interaction between the D and iodine molecules. The limiting value of this shift is at 350 nm, which is the characteristic absorption of the I observations were made by us and several other investigators in the study of molecular complexes of iodine with various donors [35,36]. Furthermore, the spectrum (Fig.…”

Section: Interaction Of Pantoprazole With Iodinementioning

confidence: 54%

Spectroscopic studies on the dynamics of charge‐transfer interaction of pantoprazole drug with DDQ and iodine

Pandeeswaran

El‐Mossalamy

Elango

2009

Int J of Chemical Kinetics

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Spectrophotometric method was used to study the kinetics of charge-transfer (CT) complexes of pantoprazole with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and iodine. The reactions of DDQ and iodine with pantoprazole have been investigated in different solvents at three different temperatures. The products of the interactions have been isolated and characterized using UV-vis, GC-MS, FT-IR, and far-IR spectral techniques. The rate of formation of the product has been measured and discussed as a function of solvents and temperature. The iodine complex indicates the formation of the tri-iodide CT complex with a general formula [(PTZ)I] + I − 3 . The characteristic strong absorptions of I − 3 are observed around 360 and 290 nm in the electronic spectra, and the far-IR spectrum exhibits three characteristic vibrations of I − 3 unit at 156, 112, and 69 cm −1 assigned to ν as (I-I), ν s (I-I), and δ(I − 3 ), respectively. The activation parameters ( G # , S # , and H # ) were obtained from the temperature dependence of the rate constants. The influence of relative permittivity of the medium on the rate indicated that the intermediate is more polar than the reactants, and this observation was further well supported by spectral studies. Based on the spectrokinetic results, plausible mechanisms for the interaction of the drug with the chosen acceptors, which proceed via the formation of CT complexes and its transformation into final products, have been proposed.

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“…Immediately after mixing ethanolic solutions of colorless SULF and pale yellow colored MQ , yields a pink colored solution whose electronic spectrum showed absorption band in the 460-600 nm range. This is the characteristic absorption bands of quinone radical ion [34][35][36]. It is observed that with elapse of time the intensity of these bands decreased (Fig.…”

Section: Interaction Of Sulfamethoxazole With the Acceptorsmentioning

confidence: 86%

Spectroscopic studies on the formation of molecular complexes of sulfamethoxazole with novel 2,3,5-trichloro-6-alkoxy-1,4-benzoquinones

Ganesh

Balraj

Angupillai

et al. 2013

Journal of Molecular Structure

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Spectrophotometric study of the charge-transfer complexes of iodine with antipyrine in organic solvents

Cited by 55 publications

References 31 publications

Synthesis, spectroscopic studies and thermal analysis of charge-transfer complex of 2,2′-bipyridine with 4-hydroxybenzoic acid in different polar solvents

Synthesis, spectroscopic studies and thermal analysis of charge-transfer complex of 2,2′-bipyridine with 4-hydroxybenzoic acid in different polar solvents

Spectroscopic studies on the dynamics of charge‐transfer interaction of pantoprazole drug with DDQ and iodine

Spectroscopic studies on the formation of molecular complexes of sulfamethoxazole with novel 2,3,5-trichloro-6-alkoxy-1,4-benzoquinones

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