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Dostęp zamkniętySmectic behaviour of methyl 4-alkoxybenzoates with a partially fluorinated alkyl chain
| cris.lastimport.scopus | 2024-02-12T19:45:23Z |
| dc.abstract.en | A series of 4-alkoxybenzoic acids 1[m,n] and their methyl esters 2[m,n] containing a partially fluorinated alkyl chain was prepared and their physical properties were investigated by optical, thermal and powder X-ray diffraction (XRD) methods. The former exhibits an SmC phase, while the latter form an SmA phase. XRD analysis indicated liquid-like character of the linking alkyl chains, and showed a decreasing layer thermal expansion coefficient from positive to negative upon increasing the degree of fluorination. The new esters 2[m,n] expanded the series and permitted analysis of trends in thermal stability of the SmA phase. The results demonstrate that the SmA–I transition temperature increases by about +20 K per CF2CF2 unit, and is destabilised by –5.6 K upon extending the hydrocarbon part by each CH2CH2 group. Data for the expanded series 2[m,n] were used for comparative analysis of mesogenic behaviour in two other series of derivatives of 1[m,n]. Synthetic methods for 1[m,n] and 2[m,n] are reviewed. © 2017 Informa UK Limited, trading as Taylor & Francis Group |
| dc.affiliation | Uniwersytet Warszawski |
| dc.contributor.author | Kaszyński, Piotr |
| dc.contributor.author | Ciastek, Sylwia |
| dc.contributor.author | Szymańska, Katarzyna |
| dc.contributor.author | Jasiński, Marcin |
| dc.contributor.author | Pociecha, Damian |
| dc.date.accessioned | 2024-01-26T07:49:42Z |
| dc.date.available | 2024-01-26T07:49:42Z |
| dc.date.issued | 2018 |
| dc.description.finance | Nie dotyczy |
| dc.description.number | 1 |
| dc.description.volume | 45 |
| dc.identifier.doi | 10.1080/02678292.2017.1290288 |
| dc.identifier.issn | 0267-8292 |
| dc.identifier.uri | https://repozytorium.uw.edu.pl//handle/item/120044 |
| dc.identifier.weblink | https://www.tandfonline.com/doi/abs/10.1080/02678292.2017.1290288 |
| dc.language | eng |
| dc.pbn.affiliation | chemical sciences |
| dc.relation.ispartof | Liquid Crystals |
| dc.relation.pages | 11-21 |
| dc.rights | ClosedAccess |
| dc.sciencecloud | nosend |
| dc.subject.en | Synthesis |
| dc.subject.en | fluorination |
| dc.subject.en | smectic phases |
| dc.subject.en | powder XRD |
| dc.subject.en | structure–property relationship |
| dc.title | Smectic behaviour of methyl 4-alkoxybenzoates with a partially fluorinated alkyl chain |
| dc.type | JournalArticle |
| dspace.entity.type | Publication |