Surface tension reduction (STR) in aqueous solutions of anionic surfactants with cobalt(III) complexes

Sieng Sovanna, Takayoshi Suzuki, Masaaki Kojima, Satoshi Tachiyashiki, Masakazu Kita

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

It has been observed that, at 25.0 ± 0.1 ° C, [Co(NH3)6](ClO4)3, [Co(en)3](ClO4)3, [Co(bpy)3](ClO4)3, and [Co(phen)3](ClO4)3 in the regions of 1.25-5.00 mM aqueous solutions cause a significant surface tension reduction (STR) of water by the surfactants, sodium dodecylsulfate (SDS) and sodium dodecylbenzenesulfonate (SBS), suggesting the formation of the 1:1 and 1:2 association complexes, {[complex]3+(S-)}2+ and {[complex]3+(S-)2}+ where [complex]3+ = [Co(NH3)6]3+, [Co(en)3]3+, [Co(bpy)3]3+, or [Co(phen)3]3+, S- = DS- or BS-. The effect of [Co(en)3]3+ on STR in SDS-water system is the largest due to a strong hydrophilic interaction between amino protons of [Co(en)3]3+ and sulfate oxygen atoms of DS-. The effects of [Co(en)3]3+, [Co(bpy)3]3+, and [Co(phen)3]3+ on STR in SBS-water system are significant and almost same, meaning that the hydrophilic interaction between [Co(en)3]3+ and the sulfonate group is comparable to the hydrophobic interaction between [Co(bpy)3]3+ or [Co(phen)3]3+ and the phenyl group of BS-. The Co(III) complexes of 1.25-5.00 mM are precipitated as {[complex]3+(S-)3} at 0.0295-0.173 mM of S-. The precipitates, {[Co(bpy)3]3+(S-)3} and {[Co(phen)3]3+(S-)3} can be dissolved at higher molar ratio of [S-]/[complex3+] than 3.5 for SDS and 4.0 for SBS. This observation suggests that the aggregated premicelle [Co(bpy or phen)3]2(DS)-7 or aggregated premicelle [Co(bpy or phen)3](BS)-4 is formed.

Original languageEnglish
Pages (from-to)194-200
Number of pages7
JournalJournal of Colloid and Interface Science
Volume332
Issue number1
DOIs
Publication statusPublished - Apr 1 2009

Fingerprint

Anionic surfactants
Cobalt
Surface tension
Sodium
Water
Precipitates
Protons
Surface active agents
Association reactions
Atoms
Oxygen
tris(2,2'-bipyridyl)cobalt(III)
triphenanthrolinecobalt(III)
Surface-Active Agents
Sulfates
tris(ethylenediamine)cobalt(III)
perchlorate

Keywords

  • Co(III) complexes
  • Hydrophilic interaction
  • Hydrophobic interaction
  • Sodium dodecylbenzenesulfonate
  • Sodium dodecylsulfate
  • Surface tension

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Colloid and Surface Chemistry

Cite this

Surface tension reduction (STR) in aqueous solutions of anionic surfactants with cobalt(III) complexes. / Sovanna, Sieng; Suzuki, Takayoshi; Kojima, Masaaki; Tachiyashiki, Satoshi; Kita, Masakazu.

In: Journal of Colloid and Interface Science, Vol. 332, No. 1, 01.04.2009, p. 194-200.

Research output: Contribution to journalArticle

@article{9330c35149b7470592abcf274dd96f8f,
title = "Surface tension reduction (STR) in aqueous solutions of anionic surfactants with cobalt(III) complexes",
abstract = "It has been observed that, at 25.0 ± 0.1 ° C, [Co(NH3)6](ClO4)3, [Co(en)3](ClO4)3, [Co(bpy)3](ClO4)3, and [Co(phen)3](ClO4)3 in the regions of 1.25-5.00 mM aqueous solutions cause a significant surface tension reduction (STR) of water by the surfactants, sodium dodecylsulfate (SDS) and sodium dodecylbenzenesulfonate (SBS), suggesting the formation of the 1:1 and 1:2 association complexes, {[complex]3+(S-)}2+ and {[complex]3+(S-)2}+ where [complex]3+ = [Co(NH3)6]3+, [Co(en)3]3+, [Co(bpy)3]3+, or [Co(phen)3]3+, S- = DS- or BS-. The effect of [Co(en)3]3+ on STR in SDS-water system is the largest due to a strong hydrophilic interaction between amino protons of [Co(en)3]3+ and sulfate oxygen atoms of DS-. The effects of [Co(en)3]3+, [Co(bpy)3]3+, and [Co(phen)3]3+ on STR in SBS-water system are significant and almost same, meaning that the hydrophilic interaction between [Co(en)3]3+ and the sulfonate group is comparable to the hydrophobic interaction between [Co(bpy)3]3+ or [Co(phen)3]3+ and the phenyl group of BS-. The Co(III) complexes of 1.25-5.00 mM are precipitated as {[complex]3+(S-)3} at 0.0295-0.173 mM of S-. The precipitates, {[Co(bpy)3]3+(S-)3} and {[Co(phen)3]3+(S-)3} can be dissolved at higher molar ratio of [S-]/[complex3+] than 3.5 for SDS and 4.0 for SBS. This observation suggests that the aggregated premicelle [Co(bpy or phen)3]2(DS)-7 or aggregated premicelle [Co(bpy or phen)3](BS)-4 is formed.",
keywords = "Co(III) complexes, Hydrophilic interaction, Hydrophobic interaction, Sodium dodecylbenzenesulfonate, Sodium dodecylsulfate, Surface tension",
author = "Sieng Sovanna and Takayoshi Suzuki and Masaaki Kojima and Satoshi Tachiyashiki and Masakazu Kita",
year = "2009",
month = "4",
day = "1",
doi = "10.1016/j.jcis.2008.12.005",
language = "English",
volume = "332",
pages = "194--200",
journal = "Journal of Colloid and Interface Science",
issn = "0021-9797",
publisher = "Academic Press Inc.",
number = "1",

}

TY - JOUR

T1 - Surface tension reduction (STR) in aqueous solutions of anionic surfactants with cobalt(III) complexes

AU - Sovanna, Sieng

AU - Suzuki, Takayoshi

AU - Kojima, Masaaki

AU - Tachiyashiki, Satoshi

AU - Kita, Masakazu

PY - 2009/4/1

Y1 - 2009/4/1

N2 - It has been observed that, at 25.0 ± 0.1 ° C, [Co(NH3)6](ClO4)3, [Co(en)3](ClO4)3, [Co(bpy)3](ClO4)3, and [Co(phen)3](ClO4)3 in the regions of 1.25-5.00 mM aqueous solutions cause a significant surface tension reduction (STR) of water by the surfactants, sodium dodecylsulfate (SDS) and sodium dodecylbenzenesulfonate (SBS), suggesting the formation of the 1:1 and 1:2 association complexes, {[complex]3+(S-)}2+ and {[complex]3+(S-)2}+ where [complex]3+ = [Co(NH3)6]3+, [Co(en)3]3+, [Co(bpy)3]3+, or [Co(phen)3]3+, S- = DS- or BS-. The effect of [Co(en)3]3+ on STR in SDS-water system is the largest due to a strong hydrophilic interaction between amino protons of [Co(en)3]3+ and sulfate oxygen atoms of DS-. The effects of [Co(en)3]3+, [Co(bpy)3]3+, and [Co(phen)3]3+ on STR in SBS-water system are significant and almost same, meaning that the hydrophilic interaction between [Co(en)3]3+ and the sulfonate group is comparable to the hydrophobic interaction between [Co(bpy)3]3+ or [Co(phen)3]3+ and the phenyl group of BS-. The Co(III) complexes of 1.25-5.00 mM are precipitated as {[complex]3+(S-)3} at 0.0295-0.173 mM of S-. The precipitates, {[Co(bpy)3]3+(S-)3} and {[Co(phen)3]3+(S-)3} can be dissolved at higher molar ratio of [S-]/[complex3+] than 3.5 for SDS and 4.0 for SBS. This observation suggests that the aggregated premicelle [Co(bpy or phen)3]2(DS)-7 or aggregated premicelle [Co(bpy or phen)3](BS)-4 is formed.

AB - It has been observed that, at 25.0 ± 0.1 ° C, [Co(NH3)6](ClO4)3, [Co(en)3](ClO4)3, [Co(bpy)3](ClO4)3, and [Co(phen)3](ClO4)3 in the regions of 1.25-5.00 mM aqueous solutions cause a significant surface tension reduction (STR) of water by the surfactants, sodium dodecylsulfate (SDS) and sodium dodecylbenzenesulfonate (SBS), suggesting the formation of the 1:1 and 1:2 association complexes, {[complex]3+(S-)}2+ and {[complex]3+(S-)2}+ where [complex]3+ = [Co(NH3)6]3+, [Co(en)3]3+, [Co(bpy)3]3+, or [Co(phen)3]3+, S- = DS- or BS-. The effect of [Co(en)3]3+ on STR in SDS-water system is the largest due to a strong hydrophilic interaction between amino protons of [Co(en)3]3+ and sulfate oxygen atoms of DS-. The effects of [Co(en)3]3+, [Co(bpy)3]3+, and [Co(phen)3]3+ on STR in SBS-water system are significant and almost same, meaning that the hydrophilic interaction between [Co(en)3]3+ and the sulfonate group is comparable to the hydrophobic interaction between [Co(bpy)3]3+ or [Co(phen)3]3+ and the phenyl group of BS-. The Co(III) complexes of 1.25-5.00 mM are precipitated as {[complex]3+(S-)3} at 0.0295-0.173 mM of S-. The precipitates, {[Co(bpy)3]3+(S-)3} and {[Co(phen)3]3+(S-)3} can be dissolved at higher molar ratio of [S-]/[complex3+] than 3.5 for SDS and 4.0 for SBS. This observation suggests that the aggregated premicelle [Co(bpy or phen)3]2(DS)-7 or aggregated premicelle [Co(bpy or phen)3](BS)-4 is formed.

KW - Co(III) complexes

KW - Hydrophilic interaction

KW - Hydrophobic interaction

KW - Sodium dodecylbenzenesulfonate

KW - Sodium dodecylsulfate

KW - Surface tension

UR - http://www.scopus.com/inward/record.url?scp=59049097004&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=59049097004&partnerID=8YFLogxK

U2 - 10.1016/j.jcis.2008.12.005

DO - 10.1016/j.jcis.2008.12.005

M3 - Article

C2 - 19101674

AN - SCOPUS:59049097004

VL - 332

SP - 194

EP - 200

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

SN - 0021-9797

IS - 1

ER -