Water soluble squaraine dyes for use as colorimetric stains in gel electrophoresis. Part 2

D.E. Lynch, A.N. Kirkham, J. Heptinstall, Martin Cox

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this study we demonstrate that it is possible to ion exchange the small organic cations used to charge balance the dual-pendant sulfonate groups on the particular squaraine system under investigation with metal ions, although we also report that problems with low solubility in water may arise. The ion exchanged squaraine dyes that were water soluble include the lithium, sodium and potassium salts, as well as the sulfonic acid variant, were examined as colorimetric stains for protein separation in sodium dodecylsulphate polyacrylamide gel electrophoresis. Although all four performed well as stains, none were better than the previously reported bis-piperidinium variant, which can also be imaged fluorimetrically. None of the gels stained with the ion exchanged dyes exhibited any similar fluorescence ability. Also reported here are the X-ray crystal structures of the bis-morpholinium, bis-piperidinium, bis-(3-hydroxypyridinium), bis-(2-amino-1,3-thiazolium), and bis-(2-aminopyridinium) variants as well as the bis-piperidinium variant of the dual-pendant sulfonate bis(benz[e]indolenine)squaraine.
Original languageEnglish
Pages (from-to)160-167
JournalDyes and Pigments
Volume99
Issue number1
DOIs
Publication statusPublished - 2013

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Electrophoresis
Coloring Agents
Gels
Dyes
Sodium
Water
Ions
Polyacrylates
Metal ions
Potassium
Ion exchange
Lithium
Solubility
Crystal structure
Positive ions
Fluorescence
Salts
Proteins
X rays
Sulfonic Acids

Bibliographical note

The full text of this item is not available from the repository.

Keywords

  • colorimetric stain
  • gel electrophoresis
  • ion exchange
  • protein detection
  • squaraine dyes
  • X-ray crystal structure

Cite this

Water soluble squaraine dyes for use as colorimetric stains in gel electrophoresis. Part 2. / Lynch, D.E.; Kirkham, A.N.; Heptinstall, J.; Cox, Martin.

In: Dyes and Pigments, Vol. 99, No. 1, 2013, p. 160-167.

Research output: Contribution to journalArticle

Lynch, D.E. ; Kirkham, A.N. ; Heptinstall, J. ; Cox, Martin. / Water soluble squaraine dyes for use as colorimetric stains in gel electrophoresis. Part 2. In: Dyes and Pigments. 2013 ; Vol. 99, No. 1. pp. 160-167.
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