Colorimetric detection of trace water in tetrahydrofuran using N,N′-substituted oxoporphyrinogens
作者:Shinsuke Ishihara、Jan Labuta、Tomáš Šikorský、Jaroslav V. Burda、Naoko Okamoto、Hideki Abe、Katsuhiko Ariga、Jonathan P. Hill
DOI:10.1039/c2cc31118f
日期:——
Oxoporphyrinogens (OxPs) bind water molecules at pyrrolic NH and quinonoid carbonyl groups leading to visible colour changes due to variation in the Ï-electronic structure of OxPs. Introduction of hydrophilic substituents at two pyrrole NH groups improves sensitivity to H2O, and one OxP derivative is a colorimetric indicator of trace H2O (â¼50 ppm) in THF.