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6397420 
Journal Article 
Poly(methyl methacrylate)-supported polydiacetylene films: unique chromatic transitions and molecular sensing 
Parambath Kootery, K; Jiang, H; Kolusheva, S; Vinod, TP; Ritenberg, M; Zeiri, L; Volinsky, R; Malferrari, D; Galletti, P; Tagliavini, E; Jelinek, R 
2014 
1 
ACS Applied Materials & Interfaces
ISSN: 1944-8244
EISSN: 1944-8252 
6 
11 
8613-8620 
English 
24813239 
WOS:000337336900079 
Polydiacetylenes (PDAs) constitute a family of conjugated polymers exhibiting unique colorimetric and fluorescence transitions, and have attracted significant interest as chemo- and biosensing materials. We spin-coated PDA films upon poly(methyl methacrylate) (PMMA), and investigated the photophysical properties and sensing applications of the new PDA configuration. Specifically, the as-polymerized blue PDA layer underwent distinct transformations to purple, red, and yellow phases, which could be quantified through conventional color scanning combined with application of image analysis algorithms. Furthermore, we recorded a reversible red-purple PDA transition that was induced by ultraviolet irradiation, a phenomenon that had not been reported previously in PDA film systems. We show that distinct color and fluorescence transitions were induced in the PMMA-supported PDA films by amphiphilic substances-surfactants and ionic liquids-and that the chromatic transformations were correlated to the analyte structures and properties. Overall, this study presents a new chromatic PDA film system in which noncovalent interactions between the PMMA substrate and spin-coated PDA give rise to distinct chromatic properties and molecular sensing capabilities. 
polydiacetylene;colorimetric sensors;spin coating;PMMA;thin films