Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Orientation phenomena in chromophore DR1-containing polymer films and their non-linear optical response
Δημιουργός/Συγγραφέας:	Moencke, Doris Mountrichas, Grigoris [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I.
Εκδότης:	Elsevier S.A.
Τόπος έκδοσης:	AMSTERDAM
Ημερομηνία:	2011-04-15
Γλώσσα:	Αγγλικά
ISSN:	0921-5107
DOI:	10.1016/j.mseb.2011.01.002
Περίληψη:	The effectiveness of chromophore alignment in polymer films following corona poling can be assessed by the generated second harmonic signal. Optimization of the stability and strength of this nonlinear optical response may improve with a better understanding of the underlying principal order phenomena. Structural analysis by vibrational, optical, and (1)H NMR spectroscopy reveals side chain tacticity, aggregation effects, and changes in orientation as a function of temperature. Co-polymers with the functionalized chromophore Disperse Red 1 methacrylate (MDR1) were prepared for three different methacrylate types. High side chain polarity and short side chain length increase generally chromophore aggregation in films, whereas the very long poly-ether side chains in PMEO based co-polymers are wrapped separately around the DR1 entities. Side chain tacticity depends on space requirements, but also on the capacity of side groups to form OH-bridges. Side chain tacticity might present an additional parameter for the assessment of chromophore aggregation and poling induced alignments. Stepwise heating of co-polymer films causes an increase in the number of random over ordered side chain arrangements. Cross-linking by anhydride formation is observed after heating the methacrylic acid based co-polymer.
Τίτλος πηγής δημοσίευσης:	Materials Science and Engineering B (formerly Part of Materials Science and Engineering)
Τόμος/Κεφάλαιο:	176
Τεύχος:	6
Σελίδες:	515-520
Θεματική Κατηγορία:	[EL] Επιστήμη (Γενικά)[EN] Science (General) [EL] Τεχνολογία (Γενικά)[EN] Technology (General) [EL] Φυσική[EN] Physics
Λέξεις-Κλειδιά:	Infrared spectroscopy Nuclear magnetic resonance Nonlinear optical effects Polymers Thin films Electric field effect Materials Science, Multidisciplinary Physics, Condensed Matter
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2011 Elsevier B.V. All rights reserved.
Ηλεκτρονική διεύθυνση περιοδικού (link) :	http://www.elsevier.com/locate/mseb
Σημειώσεις:	Special Issue SI
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο