Rapid Spectrophotometric Determination of Manganese.  Triethanolamine and Peroxide Complexes of Manganese(III)

Nightingale, E. R.

doi:10.1021/ac60145a036

Cited by 25 publications

(12 citation statements)

References 8 publications

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“…Tetraethyllead is decomposed and lead is extracted simultaneously with the manganese, and may be determined polarographically in an aliquot of the acid extract. The nianganese(I1) and (111) and lead(I1) complexes with triethanolamine are characterized, and the formation of a manganese(II1)-peroxide complex is confirmed (6). The current-potential curve for the reduction of manganese(II1) in alkaline triethanolamine solution exhibits two waves (3).…”

mentioning

confidence: 88%

“…By a method of continuous variations, the empirical composition of the manganese (11)-triethanolamine complex has been determined to be Mn(TEA)2+2 (6). Since the half-wave potential of the manganese (111) -( 11) couple is independent of the concentration of triethanolamine, the manganese(I1) and (111) ible reaction of this type, the slope of the plot of half-wave potential us.…”

Section: Reagents and Apparatusmentioning

confidence: 99%

“…The previous polarographic procedures for manganese using triethanolamine involved the preparation of the manganese(II1)-triethanolamine complex by air oxidation of the manganese (11) complex (3,6,8,9). All attempts in these laboratories to achieve rapid quantitative air oxidation a t room temperature have been unsuccessful because the last stage of the oxidation reaction is slow and an interfering manganese(II1)-peroxide complex is formed (6).…”

Section: Reagents and Apparatusmentioning

confidence: 99%

“…All attempts in these laboratories to achieve rapid quantitative air oxidation a t room temperature have been unsuccessful because the last stage of the oxidation reaction is slow and an interfering manganese(II1)-peroxide complex is formed (6). I n recent studies, Issa and coworkers (3) have observed that the time required to obtain complete oxidation of the manganese(I1)-triethanolamine complex was proportional to the concentration of manganese and dependent upon the concentrations of triethanolamine and sodium hydroxide.…”

Section: Reagents and Apparatusmentioning

confidence: 99%

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Polarographic Determination of Manganese in Gasoline. Triethanolamine Complexes of Manganese(II) and (III) and Lead(II)

Nightingale¹,

Wilcox²,

Zielinski³

1960

Anal. Chem.

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mentioning

confidence: 88%

Section: Reagents and Apparatusmentioning

confidence: 99%

Section: Reagents and Apparatusmentioning

confidence: 99%

Section: Reagents and Apparatusmentioning

confidence: 99%

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Polarographic Determination of Manganese in Gasoline. Triethanolamine Complexes of Manganese(II) and (III) and Lead(II)

Nightingale¹,

Wilcox²,

Zielinski³

1960

Anal. Chem.

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“…Triethanolamine (TEA) has been reported in the literature to form stable complexes with Mn 3+ and Mn 2+ in alkaline solution 8,42 and has also been examined as an electrolyte additive. For example, Kozawa et al have reported that TEA has no effect on the first electron discharge curve, but produces a flat and higher voltage profile for the second electron discharge.…”

mentioning

confidence: 99%

Impact of Triethanolamine as an Additive for Rechargeable Alkaline Zn/MnO₂Batteries under Limited Depth of Discharge Conditions

Kelly

Duay

Lambert

et al. 2017

J. Electrochem. Soc.

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Rechargeable alkaline Zn/MnO 2 batteries are being developed for use as cost-effective grid-scale energy storage devices. Previous studies have shown that limiting the depth of discharge (DOD) of the MnO 2 cathode extends cell lifetime while still providing a cost-effective battery system. Herein, a comprehensive study of triethanolamine (TEA) as an additive in Zn/MnO 2 limited DOD batteries is provided by examining the effect of TEA in full cells as well as independently on the cathode, anode, separator, and electrolyte. Improvement in cycle-ability of the cathode (on average, 80% of cycled capacity remains after 191 cycles without TEA, 568 cycles with TEA) and a decrease in ionic zinc mobility across Celgard 3501 (7.91 × 10 −5 cm 2 /min without TEA, 3.56 × 10 −5 cm 2 /min with TEA) and Cellophane 350P00 (3.26 × 10 −5 cm 2 /min without TEA, 4.74 × 10 −6 cm 2 /min with TEA) separators upon the addition of TEA are demonstrated. However, TEA increased both the reduction potential of Zn (−0.68 V vs. Hg/HgO without TEA, −0.76 V with TEA) and the solubility of Zn 2+ (0.813 M without TEA, 1.023 M with TEA). Overall, the addition of TEA extended the lifetime of limited DOD cells on average by 297%.

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The Redox Chemistry of Manganese(III) and ‐(IV) Complexes

Yamaguchi

Sawyer

1985

Israel Journal of Chemistry

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The oxidation‐reduction thermodynamics for the manganese(III), ‐(IV), and ‐(II) ions, and their various complexes, are reviewed for both aqueous and aprotic media. In aqueous solutions the reduction potential for the manganese(III)/(II) couple has values that range from +1.51 V vs. NHE (hydrate at pH 0) to −0.95 V (glucarate complex at pH 13.5). The Mn(IV)/(III) couple has values that range from +1.0 V (solid MnIVO3 at pH 0) to −0.04 V (tris gluconate complex at pH 13.5). With anhydrous media the propensity for the Mn(III) ion to disproportionate to solid MnIVO2 and Mn(II) ion is avoided. For aprotic systems the range of redox potentials for various manganese complexes is from +2.01 V and +1.30 for the Mn(IV)/(III) and Mn(III)/(II) couples (bis terpyridyl tri‐N‐oxide complex in MeCN), respectively, to −0.96 V for the Mn(IV)/(III) couple (tris 3,5,‐di‐tert‐butylcatecholate complex in Me2SO). The redox reactions between manganese complexes and dioxygen species (O2, O2, and H2O2) also are reviewed.

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Rapid Spectrophotometric Determination of Manganese. Triethanolamine and Peroxide Complexes of Manganese(III)

Cited by 25 publications

References 8 publications

Polarographic Determination of Manganese in Gasoline. Triethanolamine Complexes of Manganese(II) and (III) and Lead(II)

Polarographic Determination of Manganese in Gasoline. Triethanolamine Complexes of Manganese(II) and (III) and Lead(II)

Impact of Triethanolamine as an Additive for Rechargeable Alkaline Zn/MnO₂Batteries under Limited Depth of Discharge Conditions

The Redox Chemistry of Manganese(III) and ‐(IV) Complexes

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Rapid Spectrophotometric Determination of Manganese. Triethanolamine and Peroxide Complexes of Manganese(III)

Cited by 25 publications

References 8 publications

Polarographic Determination of Manganese in Gasoline. Triethanolamine Complexes of Manganese(II) and (III) and Lead(II)

Polarographic Determination of Manganese in Gasoline. Triethanolamine Complexes of Manganese(II) and (III) and Lead(II)

Impact of Triethanolamine as an Additive for Rechargeable Alkaline Zn/MnO2Batteries under Limited Depth of Discharge Conditions

The Redox Chemistry of Manganese(III) and ‐(IV) Complexes

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Impact of Triethanolamine as an Additive for Rechargeable Alkaline Zn/MnO₂Batteries under Limited Depth of Discharge Conditions