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Helical Polyacetylene Synthesized with a Chiral Nematic Reaction Field
Abstract
Helical polyacetylene was synthesized under an asymmetric reaction field consisting of chiral nematic (N*) liquid crystals (LCs). The chiral nematic LC was prepared by adding a chiroptical binaphthol derivative as a chiral dopant to a mixture of two nematic LCs. Acetylene polymerizations were carried out using the catalyst titanium tetra- n -butoxide–triethylaluminum dissolved in the chiral nematic LC solvent. The polyacetylene film was shown by scanning electron microscopy to consist of clockwise or counterclockwise helical structure of fibrils. A Cotton effect was observed in the region of the π → π* transition of the polyacetylene chain in circular dichroism spectra. The high electrical conductivities of ∼1500 to 1800 siemens per centimeter after iodine doping and the chiral helicity of these films may be exploited in electromagnetic and optical applications.
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Lipid Tubules: A Paradigm for Molecularly Engineered Structures
Schnur, J. M. (1993) · Science · doi:10.1126/science.262.5140.1669 · Cited by 723
Cited by
Yashima, E., Ousaka, N., Taura, D., Shimomura, K., Ikai, T., & Maeda, K. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.6b00354 · Cited by 2,004
Challenges and breakthroughs in recent research on self-assembly
Ariga, K., Hill, J. P., Lee, M. V., Vinu, A., Charvet, R., & Acharya, S. (2008) · Science and Technology of Advanced Materials · doi:10.1088/1468-6996/9/1/014109 · Cited by 759
Metadata
- Authors
- Akagi, K., Piao, G., Kaneko, S., Sakamaki, K., Shirakawa, H., & Kyotani, M.
- Venue
- Science
- Published
- 1998-11-27
- Volume
- 282
- Issue
- 5394
- Pages
- 1683-1686
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1992933851
- Cited by
- 414
- References
- 1
- FWCI
- 11.53
- Type
- journal article
- Language
- en
- Open access
- closed
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- Akagi, K., Piao, G., Kaneko, S., Sakamaki, K., Shirakawa, H., & Kyotani, M. (1998). Helical Polyacetylene Synthesized with a Chiral Nematic Reaction Field. Science. https://doi.org/10.1126/science.282.5394.1683
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
