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Two-dimensionally periodic phases in mixtures of compounds made of rodlike and bent-core molecules.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Pratibha, R. Madhusudana, N. V. Sadashiva, B. K. |
| Copyright Year | 2005 |
| Abstract | We report two distinct types of two-dimensionally periodic phases in different concentration regions of a binary system composed of the bent-core (BC) compound 1,3-phenylene bis[4-(3-methylbenzoyloxy)] 4(') - n-dodecylbiphenyl 4(') -carboxylate (BC12) and the rodlike (R) compound 4-n-octyloxy 4(') -cyanobiphenyl (8OCB). BC12 exhibits only the lamellar B2 phase. 8OCB which has a highly polar cyano end group exhibits the smectic-A(d) phase with a lamellar structure of partial bilayers made of antiparallel pairs of the polar molecules. The molecular arrangements in the two-dimensionally periodic phases have been deduced based on optical microscopy, polarized infrared and x-ray diffraction studies. The arrangement in the two-dimensionally periodic phase in lower concentration ranges of BC12 (24 to 35 mol% ) is dictated by the partial bilayer structure formed by the rods. The BC molecules arrange themselves with their arrow axes parallel to the long axes of the R molecules and the structure conforms to the c2mm space group symmetry. In higher concentration ranges of BC12 (35 to 60 mol% ) the structure is dominated by the BC molecules, to form the familiar B1 phase with the p2mg space group symmetry. The R molecules lie at the interfaces of these domains stabilizing the structure. |
| Starting Page | 011701 |
| Ending Page | 011701 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| DOI | 10.1103/PhysRevE.71.011701 |
| PubMed reference number | 15697617 |
| Journal | Medline |
| Volume Number | 71 |
| Issue Number | 1 |
| Part | 1 |
| Alternate Webpage(s) | http://dspace.rri.res.in/jspui/bitstream/2289/1297/1/2005%20PRE%2071%20p011701.pdf |
| Alternate Webpage(s) | https://doi.org/10.1103/PhysRevE.71.011701 |
| Journal | Physical review. E, Statistical, nonlinear, and soft matter physics |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
