Photophysical Properties and Two-Photon Polymerization Ability of a Nitroalkoxystilbene Derivative
| Autor: | Albert Defoin, Ming Jin, Fabrice Morlet-Savary, Jean-Pierre Malval, Hélène Chaumeil, Davy-Louis Versace, Lavinia Balan |
|---|---|
| Přispěvatelé: | Photomatériaux pour l'Optique et les Nanotechnologies (PHOTON LRC 7228), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Departement de Photochimie Générale, Ecole Nationale Supérieure de Chimie de Mulhouse, Chimie organique et bioorganique (COB), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Ecole Nationale Supérieure de Chimie de Mulhouse-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2009 |
| Předmět: |
education.field_of_study
Photoisomerization 010405 organic chemistry Chemistry Population Solvatochromism [CHIM.MATE]Chemical Sciences/Material chemistry 010402 general chemistry Photochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Solvent [CHIM.POLY]Chemical Sciences/Polymers General Energy Intersystem crossing Polymerization Excited state Flash photolysis Physical and Theoretical Chemistry education ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Journal of Physical Chemistry C Journal of Physical Chemistry C, American Chemical Society, 2009, 113 (49), pp.20812-20821 HAL |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp9075977 |
| Popis: | The photophysical behavior of the trans-4-propoxy 4′-nitrostilbene (PNS) as well as its one- and two-photon polymerization properties are reported. A detailed solvatochromic analysis of the steady-state and time-resolved fluorescence indicates that the locally excited state of PNS (LE) undergoes multiple deactivation pathways which are sequentially triggered by the solvent polarity. In low polar solvent, an efficient intersystem crossing (ISC) identified as a S1→Tn process leads to the population of the lowest triple state from which the trans−cis photoisomerization is mainly proceeding. From ns-laser flash photolysis measurements, it also appears that the T1 state which exhibits a nπ* character can efficiently abstract a hydrogen from aliphatic amines and subsequently produces α-aminoalkyl radicals, highly reactive species for the photoinitiation of free-radical polymerization. As a consequence, PNS constitutes a good photoinitiating system. However, the further increase of the solvent polarity opens a n... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|