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Optically active polyimides with different thermal histories of their preparation
- 1.0559219 - ÚCHP 2023 RIV US eng J - Journal Article
Sysel, P. - Hovorka, Š. - Kohout, M. - Holakovský, R. - Žádný, Jaroslav - Čížek, Jan - Izák, Pavel
Optically active polyimides with different thermal histories of their preparation.
Chirality. Roč. 34, č. 8 (2022), s. 1151-1161. ISSN 0899-0042. E-ISSN 1520-636X
R&D Projects: GA ČR(CZ) GA20-06264S
Institutional support: RVO:67985858
Keywords : chiral selector * circular dichroism * optical activity
OECD category: Chemical process engineering
Impact factor: 2, year: 2022
Method of publishing: Limited access
Optically active linear polyimides and hyperbranched poly (amic acid-imide) were prepared by using procedures varying in particular in the maximum temperature employed in their synthesis. The two types of linear polyimides were based on 4,4 '-(hexafluoroisopropylidene)diphthalic anhydride and 1,2-diaminocylohexane enantiomers or 4,4 '-(hexafluoroisopropylidene)diphthalic anhydride and 2,2 '-diamino-1,1 '-binaphthalene enantiomers. The amine-terminated hyperbranched poly (amic acid-imide) was prepared from 4,4 '-(hexafluoroisopropylidene)diphthalic anhydride and 4,4 ',4 ''-triaminotriphenylmethane, and its end groups were modified with the chiral selectors N-acetyl-D-phenylalanine or N-acetyl-L-phenylalanine. The final structure of the products was analyzed by IR spectroscopy, and their optical activity was evaluated and confirmed by polarimetry or circular dichroism.
Permanent Link: https://hdl.handle.net/11104/0332631
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