p-phenylenediammonium-smectites as adsorbents with colorimetric detection ability for phenols in water

Tomohiko Okada, Makoto Ogawa

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The ion exchange of p-phenylenediammonium and sodium-smectites (montmorillonite and synthetic saponite) resulted in the formation of p-phenylenediammonium radical cation and its dimer by the electron transfer from p-phenylenediammonium to smectites, as revealed by the color change (from colorless to green) as well as the visible absorption spectra. The p-phenylenediammonium-saponite thus obtained adsorbed phenols from aqueous solutions. The basal spacing of the p-phenylenediammonium-saponite increased upon the uptake of phenols, indicating a change in the microstructure. The uptake of phenols into the p-phenylenediammonium-saponite from aqueous solutions occurred through the formation of indoaniline dyes, as revealed by the color change from green to purple (for phenol) or purple-blue (for 2,4-dichlorophenol) as well as the absorption spectra. On the contrary, phenols were not intercalated into the interlayer space of the p-phenylenediammonium- montmorillonite.

Original languageEnglish
Pages (from-to)1165-1170
Number of pages6
JournalBulletin of the Chemical Society of Japan
Volume77
Issue number6
DOIs
Publication statusPublished - 2004

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Phenols
Adsorbents
Bentonite
Water
Absorption spectra
Color
Phenol
Dimers
Cations
Ion exchange
Coloring Agents
Sodium
Microstructure
Smectite
saponite
Electrons

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

p-phenylenediammonium-smectites as adsorbents with colorimetric detection ability for phenols in water. / Okada, Tomohiko; Ogawa, Makoto.

In: Bulletin of the Chemical Society of Japan, Vol. 77, No. 6, 2004, p. 1165-1170.

Research output: Contribution to journalArticle

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AB - The ion exchange of p-phenylenediammonium and sodium-smectites (montmorillonite and synthetic saponite) resulted in the formation of p-phenylenediammonium radical cation and its dimer by the electron transfer from p-phenylenediammonium to smectites, as revealed by the color change (from colorless to green) as well as the visible absorption spectra. The p-phenylenediammonium-saponite thus obtained adsorbed phenols from aqueous solutions. The basal spacing of the p-phenylenediammonium-saponite increased upon the uptake of phenols, indicating a change in the microstructure. The uptake of phenols into the p-phenylenediammonium-saponite from aqueous solutions occurred through the formation of indoaniline dyes, as revealed by the color change from green to purple (for phenol) or purple-blue (for 2,4-dichlorophenol) as well as the absorption spectra. On the contrary, phenols were not intercalated into the interlayer space of the p-phenylenediammonium- montmorillonite.

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