Mesomorphism of hybrid siloxane-triphenylene star-shaped oligomers
Novel hybrid triphenylene-carbosiloxane liquid crystalline monomers and star-shaped oligomers have been synthesized and their thermal behavior and liquid-crystalline properties analyzed and characterized. All compounds exhibit a columnar hexagonal phase and show, particularly the oligomers, a small...
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2007
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v19_n8_p1992_Zelcer http://hdl.handle.net/20.500.12110/paper_08974756_v19_n8_p1992_Zelcer |
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paper:paper_08974756_v19_n8_p1992_Zelcer |
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paper:paper_08974756_v19_n8_p1992_Zelcer2023-06-08T15:49:16Z Mesomorphism of hybrid siloxane-triphenylene star-shaped oligomers Crystalline materials Hybrid materials Microscopic examination Monomers Phase transitions Substitution reactions Columnar hexagonal phase Crystalline properties Star-shaped oligomers Triphenylene moiety Oligomers Novel hybrid triphenylene-carbosiloxane liquid crystalline monomers and star-shaped oligomers have been synthesized and their thermal behavior and liquid-crystalline properties analyzed and characterized. All compounds exhibit a columnar hexagonal phase and show, particularly the oligomers, a small tendency to crystallize. The substitution pattern on the central triphenylene moiety has very different effects on the crystal to columnar phase and columnar to isotropic liquid-phase transitions. A novel sterically induced superlattice has been found, and a model for the microscopic structure is proposed. One compound could be mechanically aligned, leading to well-oriented columnar liquid crystals. © 2007 American Chemical Society. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v19_n8_p1992_Zelcer http://hdl.handle.net/20.500.12110/paper_08974756_v19_n8_p1992_Zelcer |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Crystalline materials Hybrid materials Microscopic examination Monomers Phase transitions Substitution reactions Columnar hexagonal phase Crystalline properties Star-shaped oligomers Triphenylene moiety Oligomers |
| spellingShingle |
Crystalline materials Hybrid materials Microscopic examination Monomers Phase transitions Substitution reactions Columnar hexagonal phase Crystalline properties Star-shaped oligomers Triphenylene moiety Oligomers Mesomorphism of hybrid siloxane-triphenylene star-shaped oligomers |
| topic_facet |
Crystalline materials Hybrid materials Microscopic examination Monomers Phase transitions Substitution reactions Columnar hexagonal phase Crystalline properties Star-shaped oligomers Triphenylene moiety Oligomers |
| description |
Novel hybrid triphenylene-carbosiloxane liquid crystalline monomers and star-shaped oligomers have been synthesized and their thermal behavior and liquid-crystalline properties analyzed and characterized. All compounds exhibit a columnar hexagonal phase and show, particularly the oligomers, a small tendency to crystallize. The substitution pattern on the central triphenylene moiety has very different effects on the crystal to columnar phase and columnar to isotropic liquid-phase transitions. A novel sterically induced superlattice has been found, and a model for the microscopic structure is proposed. One compound could be mechanically aligned, leading to well-oriented columnar liquid crystals. © 2007 American Chemical Society. |
| title |
Mesomorphism of hybrid siloxane-triphenylene star-shaped oligomers |
| title_short |
Mesomorphism of hybrid siloxane-triphenylene star-shaped oligomers |
| title_full |
Mesomorphism of hybrid siloxane-triphenylene star-shaped oligomers |
| title_fullStr |
Mesomorphism of hybrid siloxane-triphenylene star-shaped oligomers |
| title_full_unstemmed |
Mesomorphism of hybrid siloxane-triphenylene star-shaped oligomers |
| title_sort |
mesomorphism of hybrid siloxane-triphenylene star-shaped oligomers |
| publishDate |
2007 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v19_n8_p1992_Zelcer http://hdl.handle.net/20.500.12110/paper_08974756_v19_n8_p1992_Zelcer |
| _version_ |
1768546259172327424 |