title: 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 THF.
authors.affiliation: International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Ishihara
authors.forename: Jan
authors.initials: J
authors.lastname: Labuta
authors.forename: Tomáš
authors.initials: T
authors.lastname: Šikorský
authors.forename: Jaroslav V
authors.initials: JV
authors.lastname: Burda
authors.forename: Naoko
authors.initials: N
authors.lastname: Okamoto
authors.forename: Hideki
authors.initials: H
authors.lastname: Abe
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Ariga
authors.forename: Jonathan P
authors.initials: JP
authors.lastname: Hill