APPLICATION OF MULTIVARIATE CURVE RESOLUTION ANALYSIS FOR STUDYING THE THERMODYNAMICS OF METHYLENE BLUE AGGREGATIONS IN AQUEOUS SOLUTIONS

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HEMMATEENEJAD B.; ABSALAN G.; HASANPOUR M.

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Journal: JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS) Year:2011 | Volume:8 | Issue:1 Page(s): 166-175

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Title

APPLICATION OF MULTIVARIATE CURVE RESOLUTION ANALYSIS FOR STUDYING THE THERMODYNAMICS OF METHYLENE BLUE AGGREGATIONS IN AQUEOUS SOLUTIONS

Author(s)

HEMMATEENEJAD B. | ABSALAN G. | HASANPOUR M. | Issue Writer Certificate

Keywords

MULTIVARIATE CURVE RESOLUTION

METHYLENE BLUE

AGGREGATION

CHEMOMETRICS

THERMODYNAMICS

AQUEOUS SOLUTION

Abstract

In water, METHYLENE BLUE (MB) is known to be aggregated to dimmer and trimmer at high concentration levels. We conducted a thermodynamic study on the AGGREGATION of MB using MULTIVARIATE CURVE RESOLUTION analysis of the visible absorbance spectra over a concentration range of 2.0x10-6-4.0x10-4 M. A hard modeling-based MULTIVARIATE CURVE RESOLUTION method was applied to determine the dissociation constants of the MB aggregates at various temperatures ranging from 25 to 75°C. This method was able to resolve the visible absorbance spectra as a function of MB concentration in individual temperature or simultaneously in all other temperature ranges. Utilizing the van, t Hoff relation, the enthalpy and entropy of the dissociation equilibriums were calculated. For the dissociation of both aggregates, the enthalpy and entropy changes were positive and negative, respectively.

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APA: Copy

HEMMATEENEJAD, B., ABSALAN, G., & HASANPOUR, M.. (2011). APPLICATION OF MULTIVARIATE CURVE RESOLUTION ANALYSIS FOR STUDYING THE THERMODYNAMICS OF METHYLENE BLUE AGGREGATIONS IN AQUEOUS SOLUTIONS. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), 8(1), 166-175. SID. https://sid.ir/paper/282531/en

Vancouver: Copy

HEMMATEENEJAD B., ABSALAN G., HASANPOUR M.. APPLICATION OF MULTIVARIATE CURVE RESOLUTION ANALYSIS FOR STUDYING THE THERMODYNAMICS OF METHYLENE BLUE AGGREGATIONS IN AQUEOUS SOLUTIONS. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS)[Internet]. 2011;8(1):166-175. Available from: https://sid.ir/paper/282531/en

IEEE: Copy

B. HEMMATEENEJAD, G. ABSALAN, and M. HASANPOUR, “APPLICATION OF MULTIVARIATE CURVE RESOLUTION ANALYSIS FOR STUDYING THE THERMODYNAMICS OF METHYLENE BLUE AGGREGATIONS IN AQUEOUS SOLUTIONS,” JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), vol. 8, no. 1, pp. 166–175, 2011, [Online]. Available: https://sid.ir/paper/282531/en

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