Absorption and Isomerization of Azobenzene Guest Molecules in Polymeric Nanoporous Crystalline Phases by Nicola Coscia Antonietta Cozzolino Manohar Golla & Paola Rizzo

Author:Nicola Coscia, Antonietta Cozzolino, Manohar Golla & Paola Rizzo
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Tags: PPO co-crystalline (CC) films including azobenzene guest molecules have been prepared and characterized by WAXD, FTIR and UV-Visible measurements. Isomerization reactions of azobenzene (photo-induced trans to cis and spontaneous cis to trans) included in and nanoporous-crystalline (NC) phases leading to CC phases, or simply absorbed in amorphous phase have been studied on thick and thin films. Spectroscopic analysis shows that photo-isomerization of azobenzene occurs without expulsion of azobenzene guest molecules from crystalline phases. Sorption studies of and NC films immersed into photo-isomerized azobenzene solution reveal a higher selectivity of the NC phase toward cis azobenzene isomer than the NC phase, inducing us to propose the NC phase as particularly suitable for absorbing spherically bulky guest molecules., poly(2, 6-dimethyl-1, 4-phenylene)oxide; co-crystalline phase; confined isomerization; FTIR spectra; UV-Vis spectra


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