Ion-Pair Extraction of Lithium Ion by a Water-Soluble Porphyrin

Sun HAIPING; Jun NISHIMOTO; Masaaki TABATA

doi:10.2116/analsci.13.Supplement_119

Sun HAIPING, Jun NISHIMOTO, Masaaki TABATA

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Keywords: Ion-pair extraction, octabromoporphyrin, tetrabutylammonium cation

JOURNAL FREE ACCESS

1997 Volume 13 Issue Supplement Pages 119-122

DOI https://doi.org/10.2116/analsci.13.Supplement_119

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Published: 1997 Received: - Available on J-STAGE: July 07, 2006 Accepted: - Advance online publication: - Revised: -
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Date of correction: July 07, 2006 Reason for correction: - Correction: ABSTRACT Details: Wrong : The equilibrium of ion-pair extraction of lithium porphyrin [octabromoporphyrin: 2, 3, 7, 8, 12, 13, 17, 18-octabromo-5, 10, 15, 20-tetrakis(4-sulfonatophenyl)porphyrin, H₂obtpps^4-; H₂P^4-] with tetrabutylammonium ion (X⁺) was studied at 25°C and I=0.1 (NaCl, NaOH). Extraction and dissociation constants of the ion-pair complexes of free base porphyrin, deprotonated porphyrin and lithium porphyrin, defined as K_ex(H₂p)=[X₄H₂P]_o/[H₂P^4-]_a[X⁺]_a⁴, K′_ex(HP)=[X₅HP]_o/[HP⁵⁺]_a[X⁺]_a⁵, K"_ex(Lip)=[X₅LiP]_o/[LiP^5-]_a[X⁺]_a⁵, K_disl(H₂P)=[X₃H₂P^-]_o[X⁺]_o[X₄H₂P]_o and K"_disl(Lip)=[X₄LiP^-]_o[X⁺]_o/[X₅LiP]_o, were determined. These values were found to be K_ex(H₂P)=(9.5±1.5)×10¹³ (mol^-4dm¹²), K_{disl(H₂P)SS=(3.5± 0.7)×10^-7 (mol dm^-3), K′_ex(HP)=(4.7±0.4)×10¹⁶ (mol^-5dm¹⁵) and K"_ex(LiP)K"_disl(Lip)=(8.4±0.7)×10¹² (mol^-4dm¹²), respectively.
Right : The equilibrium of ion-pair extraction of lithium porphyrin [octabromoporphyrin: 2, 3, 7, 8, 12, 13, 17, 18-octabromo-5, 10, 15, 20-tetrakis(4-sulfonatophenyl)porphyrin, Hobtpps^4-; HP^4-] with tetrabutylammonium ion (X) was studied at 25°C and I=0.1 (NaCl, NaOH). Extraction and dissociation constants of the ion-pair complexes of free base porphyrin, deprotonated porphyrin and lithium porphyrin, defined as K_ex(Hp)=[XHP]/[HP^4-][X], K′_ex(HP)=[XHP]/[HP⁵⁺][X], K"_ex(Lip)=[XLiP]/[LiP^5-][X], K_disl(HP)=[XHP][X][XHP] and K"_disl(Lip)=[XLiP][X]/[XLiP], were determined. These values were found to be K_ex(HP)=(9.5±1.5)×10¹³ (mol^-4dm¹²), K_disl(H2P)=(3.5± 0.7)×10^-7 (mol dm^-3), K′_ex(HP)=(4.7±0.4)×10¹⁶ (mol^-5dm¹⁵) and K"_ex(LiP)K"_disl(Lip)=(8.4±0.7)×10¹² (mol^-4dm¹²), respectively.}

Date of correction: July 07, 2006 Reason for correction: - Correction: AUTHOR Details: Wrong : Sun HAIPING¹⁾, Jun NISHIMOTO¹⁾, Masaaki TABATA²⁾
Right : Sun HAIPING¹⁾, Jun NISHIMOTO¹⁾, Masaaki TABATA¹⁾

Date of correction: July 07, 2006 Reason for correction: - Correction: PDF FILE Details: -

Abstract

The equilibrium of ion-pair extraction of lithium porphyrin [octabromoporphyrin: 2, 3, 7, 8, 12, 13, 17, 18-octabromo-5, 10, 15, 20-tetrakis(4-sulfonatophenyl)porphyrin, Hobtpps^4-; HP^4-] with tetrabutylammonium ion (X) was studied at 25°C and I=0.1 (NaCl, NaOH). Extraction and dissociation constants of the ion-pair complexes of free base porphyrin, deprotonated porphyrin and lithium porphyrin, defined as K_ex(Hp)=[XHP]/[HP^4-][X], K′_ex(HP)=[XHP]/[HP⁵⁺][X], K"_ex(Lip)=[XLiP]/[LiP^5-][X], K_disl(HP)=[XHP][X][XHP] and K"_disl(Lip)=[XLiP][X]/[XLiP], were determined. These values were found to be K_ex(HP)=(9.5±1.5)×10¹³ (mol^-4dm¹²), K_disl(H2P)=(3.5± 0.7)×10^-7 (mol dm^-3), K′_ex(HP)=(4.7±0.4)×10¹⁶ (mol^-5dm¹⁵) and K"_ex(LiP)K"_disl(Lip)=(8.4±0.7)×10¹² (mol^-4dm¹²), respectively.

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