Synthesis and characterization of stereoregular π-conjugated polyarylenynes, (-Ar-(E)-CH=CHC≡C-) , decorated with branched bis-alkoxy side chains
| Autor: | Sara Cerra, Francesca D’Acunzo, Giovanni Pulci, Chiara Pasquini, Federico Cruciani, Ilaria Fratoddi, Andrea D'Annibale, Mauro Bassetti |
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| Rok vydání: | 2020 |
| Předmět: |
alkyne polyaddition
chemistry.chemical_element 02 engineering and technology Conjugated system Degree of polymerization 010402 general chemistry 01 natural sciences chemistry.chemical_compound Phenylene Polymer chemistry Materials Chemistry Side chain chemistry.chemical_classification Mechanical Engineering Metals and Alloys Polymer poly(p-phenyleneethynylenevinylene)s ruthenium catalyst step-growth polymerization yellow green emission 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials Ruthenium Monomer chemistry Mechanics of Materials Alkoxy group 0210 nano-technology |
| Zdroj: | Synthetic metals 269 (2020): 116538. doi:10.1016/j.synthmet.2020.116538 info:cnr-pdr/source/autori:Cruciani F.; Pasquini C.; D'Acunzo F.; D'Annibale A.; Fratoddi I.; Cerra S.; Pulci G.; Bassetti M./titolo:Synthesis and characterization of stereoregular conjugated polyarylenynes, (-Ar-(E)-CH=CHC-C-)n, decorated with branched bis-alkoxy side chains/doi:10.1016%2Fj.synthmet.2020.116538/rivista:Synthetic metals/anno:2020/pagina_da:116538/pagina_a:/intervallo_pagine:116538/volume:269 |
| ISSN: | 0379-6779 |
| Popis: | Novel poly(p-phenyleneethynylenevinylene)s (PPEV) have been synthesized by step-growth oligomerization of 2,5-diethynyl-1,4-dialkoxybenzene monomers promoted by the ruthenium pre-catalyst [{RuCl(μ-Cl)(η6-p-cymene)}2] in the solvent mixture AcOH/CH2Cl2. The presence of the branched side chains 2-ethylhexyloxy or 3,7-dimethyloctyloxy in the phenylene unit allows for the formation of soluble π-conjugated short polymers, with slightly increased degree of polymerization (Xn = 5 - 10) and red-shifted photophysical properties (λem ≅ 515 nm in CHCl3) with respect to the analogues with linear alkoxy side chains. The aggregation properties of the polymer with 2-ethylhexyloxy groups have been investigated by an osmosis driven procedure, yielding nanospheres of different size depending on the adapted solvent/nonsolvent mixture. |
| Databáze: | OpenAIRE |
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