title: UV-Vis spectrophotometric studies of self-oxidation/dissociation of quaternary ammonium permanganates (QAP) - impact of solvent polarity.
abstract: Self-oxidation/dissociation of some quaternary ammonium permanganates (QAPs), such as cetyltrimethylammonium permanganate (CTAP) and tetrabutylammonium permanganate (TBAP), have been studied spectrophotometrically in six different organic solvent media of different polarities wherein the compounds show good solubility and stability. The optical densities of the substrates at zero time (ODo) and first-order rate constants of dissociation (k1) have been determined from their successive scanning for 40min. At comparable experimental conditions, absorption capabilities of the substrates are compared from the ODo values in various organic media; the stability of the solutions is compared from the successive scan spectra in those media. The ODo values and the k1 values have been plotted against some solvent parameters to understand their effects on the absorbance and reactivity of the QAPs. These data are also subjected to multiple regression analysis to explain the influence of various solvent parameters on the ion-pairing properties of the substrates, thus elucidating their effects on the process of self-oxidation/dissociation of the substrates.
authors.affiliation: Department of Chemistry, Veer Surendra Sai University of Technology, Burla 768 018, India.
authors.forename: Suraj Prakash
authors.initials: SP
authors.lastname: Bank
authors.affiliation: Department of Chemistry, Veer Surendra Sai University of Technology, Burla 768 018, India.
authors.forename: Partha Sarathi
authors.initials: PS
authors.lastname: Guru
authors.affiliation: Department of Chemistry, Veer Surendra Sai University of Technology, Burla 768 018, India. Electronic address: sukalyan_dash@yahoo.com.
authors.forename: Sukalyan
authors.initials: S
authors.lastname: Dash
mesh_terms: D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet
chemical_list: D002593:Cetrimonium Compounds; D017895:Manganese Compounds; D010087:Oxides; D000644:Quaternary Ammonium Compounds; D012997:Solvents; C048856:permanganic acid; C009405:tetrabutylammonium; D000077286:Cetrimonium
keywords: Cetyltrimethylammonium permanganate; Self-oxidation; Solvent effect; Solvent parameters; Spectral analysis; Tetrabutylammonium permanganate