Colorimetric detection of trace water in tetrahydrofuran using N,N'-substituted oxoporphyrinogens.

Abstract

Oxoporphyrinogens (OxPs) bind water molecules at pyrrolic NH and quinonoid carbonyl groups leading to visible colour changes due to variation in the π-electronic structure of OxPs. Introduction of hydrophilic substituents at two pyrrole NH groups improves sensitivity to H(2)O, and one OxP derivative is a colorimetric indicator of trace H(2)O (~50 ppm) in… (More)
DOI: 10.1039/c2cc31118f

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