Investigation of Free Base, Mg, Sn, and Zn Substituted Porphyrin LB Films as Gas Sensors for Organic Analytes

• Published in: The journal of physical chemistry. B Vol. 110; no. 33; pp. 16646 - 16651
• Main Authors: Dunbar, Alan D. F, Richardson, Tim H, McNaughton, Alex J, Hutchinson, Jordan, Hunter, Chris A
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 24-08-2006
• ISSN: 1520-6106; 1520-5207
• DOI: 10.1021/jp0626059

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.