Fluorescent polymers for oxygen sensing

摘要

A fluorescence based oxygen sensor can be prepared comprising a polyaniline polymer doped with one or more pyrene carboxylic acids. The polyaniline has the formula:
and the pyrene carboxylic acids have the formula:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ Pyrene-R-COOH€ƒ€ƒ€ƒ€ƒ€ƒ(II);
wherein R is an aliphatic linking group having 1 to 11 carbon atoms,
n represents half the degree of polymerization, x is about 0.5, and (1-x) is about 0.5. The sensor can be coated onto a support. Upon excitation with an appropriate wavelength, the polyaniline/pyrene coating fluoresces. Upon exposure to oxygen the fluorescence rapidly decays.