title: Investigation of free base, Mg, Sn, and Zn substituted porphyrin LB films as gas sensors for organic analytes.
abstract: The visible absorption spectra of various substituted porphyrin compounds both in chloroform solution and as Langmuir-Blodgett (LB) solid-state films have been investigated. The porphyrin compounds examined were the Zn, Sn, Mg, and free base derivatives of 5,10,15,20-tetrakis[3,4-bis(2-ethylhexyloxy)phenyl]-21H,23H-porphine (EHO). Changes in the absorption spectra of these materials induced by their exposure to various organic compounds are reported with a view toward determining whether this is a useful approach toward an optical gas sensor.
authors.affiliation: Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, UK. a.dunbar@shef.ac.uk
authors.forename: Alan D F
authors.initials: AD
authors.lastname: Dunbar
authors.forename: Tim H
authors.initials: TH
authors.lastname: Richardson
authors.forename: Alex J
authors.initials: AJ
authors.lastname: McNaughton
authors.forename: Jordan
authors.initials: J
authors.lastname: Hutchinson
authors.forename: Chris A
authors.initials: CA
authors.lastname: Hunter