Effect of Rigid Bridge-Protection Units, Quadrupolar Interactions, and Blending in Organic Electro-Optic Chromophores
| Autor: | Jose D. Avila, Larry R. Dalton, Delwin L. Elder, Wolfgang Heni, Christian Haffner, Juerg Leuthold, Lewis E. Johnson, Bruce H. Robinson, Kerry E. Garrett, Yuriy Fedoryshyn, Rachael A. Campbell |
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| Rok vydání: | 2017 |
| Předmět: |
Steric effects
Chemistry Stereochemistry General Chemical Engineering 02 engineering and technology General Chemistry Chromophore 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Acceptor 0104 chemical sciences Dipole Crystallography Dendrimer Acentric factor Materials Chemistry Side chain Molecule 0210 nano-technology |
| Zdroj: | Chemistry of Materials |
| ISSN: | 0897-4756 |
| DOI: | 10.1021/acs.chemmater.7b02020 |
| Popis: | A new organic electro-optic (EO) molecule was designed with two modifications aimed at increasing acentric order. The molecule is based on the well-known CLD donor-π bridge-acceptor template. The first structural modification introduces rigid aromatic fluorenyl and naphthyl site-isolation units (sterically bulky functional groups) to reduce aggregation. Site isolation units have been used in the past, but this is the first time that both the “front” and “back” of the CLD tetraene bridge have been modified with site-isolation units, and we had to introduce new synthetic methodology to do so. The second design element was the inclusion of cooperatively interacting aromatic dendron (HD) and fluoroaromatic dendron (FD) side groups to increase the acentric order. HD/FD units have previously been successfully used to increase EO performance, but we changed their location on the chromophore: they are attached to the donor and acceptor ends of the molecule to better match side chain ordering with the dipole momen... |
| Databáze: | OpenAIRE |
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