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Spectral Investigations of Preferential Solvation and Solute–Solvent Interactions of Free Base and Protonated 5,10,15,20-Tetrakis(4-trimethyl-ammonio-phenyl)-porphine Tetratosylate in Aqueous Organic Mixed Solvents

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Abstract

The solvatochromic properties of the free base and the protonated 5,10,15,20-tetrakis(4-trimethyl-ammonio-phenyl)-porphine tetratosylate (TTMAPP) were studied in pure water, methanol, ethanol, 2-propanol, and their corresponding aqueous mixtures. The correlation of the empirical solvent polarity scale (E T) values of TTMAPP with composition of the solvents were analyzed by the solvent exchange model of Bosch and Roses to clarify the preferential solvation of the probe dyes in the binary mixed solvents. The solvation shell composition effects in preferential solvation of the solute dyes were investigated in terms of both solvent–solvent and solute–solvent interactions and also the local mole fraction of each solvent composition was calculated in the cybotactic region of the probe. The effective mole fraction variation may provide significant physicochemical insights in the microscopic and molecular level of interactions between TTMAPP species and the solvent components and, therefore, can be used to interpret the solvent effect on kinetics and thermodynamics of TTMAPP.

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Acknowledgments

Financial support by the Research Council of Islamic Azad University, Ardabil Branch, is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Chemistry, Islamic Azad University, Ardabil Branch, Ardabil, Iran

    Farrokh Gharib & Ali Shamel

  2. Department of Chemistry, Shahid Beheshti University, G. C., Evin, Tehran, Iran

    Fatemeh Jaberi

  3. Department of Chemistry, Islamic Azad University, Jouybar Branch, Jouybar, Iran

    Ali Farajtabar

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  1. Farrokh Gharib
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  2. Ali Shamel
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  3. Fatemeh Jaberi
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  4. Ali Farajtabar
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Correspondence to Farrokh Gharib.

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Gharib, F., Shamel, A., Jaberi, F. et al. Spectral Investigations of Preferential Solvation and Solute–Solvent Interactions of Free Base and Protonated 5,10,15,20-Tetrakis(4-trimethyl-ammonio-phenyl)-porphine Tetratosylate in Aqueous Organic Mixed Solvents. J Solution Chem 42, 1083–1095 (2013). https://doi.org/10.1007/s10953-013-0007-9

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