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Making and Using a Sensing Polymeric Material for Cu2+: An Introduction to Polymers and Chemical Sensing

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Jean R. Paddock , Anne T. Maghasi , William R. Heineman and Carl J. Seliskar

Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221

J. Chem. Educ., 2005, 82 (9), p 1370

DOI: 10.1021/ed082p1370

Publication Date (Web): September 1, 2005

Section:

History, Education, and Documentation

Abstract

In this experiment, students will be introduced to concepts of polymer chemistry, chemical sensors, metal chelates, spectroscopy, and quantitative analytical methods. A polymer network is generated by students and consists of crosslinked poly(vinyl alcohol) blended with the polyelectrolyte poly(acrylic acid), which is then doped with the spectroscopically-active chelating agent PAN, 1-(2-pyridylazo)-2-napthol. All components of this hydrogel serve as an ion-exchange medium trapping cations that, when exposed to solutions of 2+ metals, can act as a material in a chemical sensor. The doped polymer network is exposed to various concentrations of Cu²⁺ for 1 hour. The formation of a PAN–Cu complex (λ_max = 550 nm) is monitored spectroscopically. A calibration curve for the complex is generated and can be used to identify Cu²⁺ samples of unknown concentration.

Keywords (Audience):

High School / Introductory Chemistry

Keywords (Domain):

Analytical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Quantitative Analysis

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Received: August 03, 2009

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Article

Making and Using a Sensing Polymeric Material for Cu2+: An Introduction to Polymers and Chemical Sensing

Abstract

Keywords (Audience):

Keywords (Domain):

Keywords (Pedagogy):

Keywords (Subject):

Tools

SciFinder Links

History

Recommend & Share

Related Content

Effect of SDS Micelles on Rhodamine-B Diffusion in Hydrogels

Introduction of Differential Scanning Calorimetry in a General Chemistry Laboratory Course: Determination of Heat Capacity of Metals and Demonstration of the Law of Dulong and Petit

Electropolymerized Conducting Polymer as Actuator and Sensor Device: An Undergraduate Electrochemical Laboratory Experiment

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