Alkylamine sensing using langmuir-blodgett films of n-alkyl-N-phenylamide-substituted zinc porphyrins

The Journal of Physical Chemistry. B
S BrittleChris A Hunter

Abstract

Two porphyrin compounds, zinc(II) 5,10,15,20-tetrakis(3,5,5-trimethyl- N-phenylhexanamide)porphyrin and zinc(II) 5,10,15,20-tetrakis(2,2-dimethyl- N-phenylpropanamide)porphyrin, have been investigated as possible candidates for the detection of alkylamines. UV-visible spectroscopy has shown that their solution absorption spectra are significantly modified upon interaction with a range of organic analytes, including acetic acid, butanone, ethylacetate, hexanethiol, octanal, octanol, alkylamines, and trimethylphosphite. Large spectral changes are observed for the family of alkylamines as a result of the specific affinity between zinc and the amine moiety. Langmuir-Blodgett (LB) films of the porphyrins have been fabricated in order to assess their solid-state sensing capability toward amines. The surface pressure-area (Pi- A) isotherms reveal a clear three-phase Langmuir film behavior and show that these monolayer films may be compressed to a relatively high surface pressure ( approximately 40-50 mN m (-1)). The isotherm data alongside molecular modeling suggest a relatively flat orientation of the porphyrin rings of both compounds: that is, a mutually parallel alignment of the plane of the porphyrin ring and that of the water sur...Continue Reading

References

Aug 30, 2005·Advances in Colloid and Interface Science·T H RichardsonR A Brook
Aug 18, 2006·The Journal of Physical Chemistry. B·Alan D F DunbarChris A Hunter

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Citations

Feb 9, 2012·Advances in Colloid and Interface Science·Gabriele Giancane, Ludovico Valli
Dec 1, 2016·ChemPlusChem·James E Ellis, Alexander Star
Aug 26, 2010·The Journal of Physical Chemistry. B·A D F DunbarC A Hunter
Apr 8, 2020·ACS Omega·Rubén Flores-SánchezJosé María Pedrosa

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