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Influence of Subphase Parameters on the Nanostructures of 5,10,15,20-Tetraphenyl-21H,23H-Porphine Films at Air-Water Interface

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In this work, we have evaluated the influence of concentration of 5,10,15,20-tetraphenyl-21H,23H-porphine solutions on π-A isotherms, varying the pH of subphase. The obtained π-A isotherms indicated the existence of different aggregation states and the dependence of area/molecule with the pH was established. There is an increase in the area/molecule for both pH = 5 and pH = 8 in low concentrations with a marked increase for the acid pH. Such trend has given such clearly evidence that proton (H+) effect in the chromophore macrocycle is potentially indicated for the pH-sensitive gas sensors.
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Keywords: CHROMOPHORE MOLECULES; LANGMUIR-BLODGETT METHOD; NANOSTRUCTURED SENSORS

Document Type: Research Article

Publication date: February 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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