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Colorimetric strips for visual lead ion recognition utilizing polydiacetylene embedded nanofibers.
- Source :
- Journal of Materials Chemistry A; 2014, Vol. 2 Issue 43, p18304-18312, 9p
- Publication Year :
- 2014
-
Abstract
- Given the dire consequences of accidental lead ion (Pb<superscript>2+</superscript>) exposure, a portable, sensitive and robust analytical approach capable of colorimetric visualization is highly desirable. In this study, we demonstrate a colorimetric strip that relies on a novel polydiacetylene (PDA) embedded polyacrylonitrile nanofibrous membrane (PAN NFM). The Pb<superscript>2+</superscript>-chromic PDA is prepared from controlled mixtures of 10,12-pentacosadiynoic acid (PCDA) and PCDA-5EG, a PCDA derivative with a pentaethylene glycol headgroup. Moreover, the Pb<superscript>2+</superscript> complexation ability is manipulated by controlling the molar ratio of PCDA to PCDA-5EG. The PAN NFM acting as a three dimensional matrix is designed for PDA immobilization, thereby improving the stability, portability and sensitivity. Upon exposure to a series of metal ions, only Pb<superscript>2+</superscript> could induce a color change, which clearly showed that our strip could act as a highly selective probe to detect Pb<superscript>2+</superscript>. Ultimately, the strip with a naked eye detection limit of 0.48 μM undergoes a brilliant color transition, from blue to red, in a concentration-dependent manner and all the color transitions of strips are quantitatively visualized by employing a chromatic framework. The findings indicate that the strip is particularly promising for visual Pb<superscript>2+</superscript> recognition due to its facile functionalization, simple construction, and versatility to empower colorimetric signaling. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 2
- Issue :
- 43
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 100392654
- Full Text :
- https://doi.org/10.1039/c4ta04547e