Issue 6, 2011
From the journal:

Organic & Biomolecular Chemistry

Functionalization of methyl orange using cationic peptideamphiphile: colorimetric discrimination between ATP and ADP at pH 2.0†

Naoya Ryua  and  Hiroshi Hachisako*ab  

* Corresponding authors

a Division of Applied Chemistry, Graduate School of Engineering, Sojo University, 4-22-1 Ikeda, Japan
E-mail: hatisako@nano.sojo-u.ac.jp
Fax: +81-96-326-3000
Tel: +81-96-326-3754

b Department of Nanoscience, Faculty of Engineering, Sojo University, 4-22-1 Ikeda, Japan

Abstract

A solvatochromic and non-fluorescent acid–base indicator, methyl orange (MO) was applied to colorimetric discrimination between adenosine triphosphate (ATP) and the corresponding diphosphate (ADP) at pH 2.0 in the presence of L-glutamic acid-derived cationic peptide amphiphile 1. This method is based on the fact that the amphiphile 1 can prevent MO from protonation even at pH 2.0. No similar colour change was observed when ADP was added instead of ATP under the same conditions. The effect of the molecular structure of several peptide amphiphiles and dyes was also investigated.

Graphical abstract: Functionalization of methyl orange using cationic peptide amphiphile: colorimetric discrimination between ATP and ADP at pH 2.0

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Article information

DOI
https://doi.org/10.1039/C0OB00437E
Article type
Paper
Submitted
16 Jul 2010
Accepted
15 Dec 2010
First published
16 Dec 2010

Org. Biomol. Chem., 2011,9, 2000-2006

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Functionalization of methyl orange using cationic peptide amphiphile: colorimetric discrimination between ATP and ADP at pH 2.0

N. Ryu and H. Hachisako, Org. Biomol. Chem., 2011, 9, 2000 DOI: 10.1039/C0OB00437E

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