Показать сокращенную информацию
dc.contributor.author | Gataullina K. | |
dc.contributor.author | Ziganshin M. | |
dc.contributor.author | Stoikov I. | |
dc.contributor.author | Klimovitskii A. | |
dc.contributor.author | Gubaidullin A. | |
dc.contributor.author | Suwińska K. | |
dc.contributor.author | Gorbatchuk V. | |
dc.date.accessioned | 2018-09-19T21:19:27Z | |
dc.date.available | 2018-09-19T21:19:27Z | |
dc.date.issued | 2017 | |
dc.identifier.issn | 1528-7483 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/143757 | |
dc.description.abstract | © 2017 American Chemical Society.A problem of controlled (smart) formation of polymorphs was solved for a set of tert-butylthiacalix[4]arene derivatives with four N-(2-acetoxyethyl)carbamoylmethoxy substituents at the lower rim with 1,3-alternate, cone, and partial cone conformations. For this, an effective polymorph screening with a reproducible influence of preparation history was achieved using guest vapor inclusion and a standard state of host glass powder. By this procedure with consequent guest release and heating, the ability of the studied calixarenes for polymorphism was investigated and compared as a function of their macrocycle conformation. The data of simultaneous thermogravimetry and differential scanning calorimetry with mass spectrometry of evolved vapors were determined together with the data of powder X-ray diffraction for the initial host samples, intermediate clathrates, and final polymorphs. In addition, single crystal X-ray diffraction data were obtained for four crystalline forms of the studied calixarenes. The results yielded a structure-property relationship, where 1,3-alternate calixarene without an extended H-bonded supramolecular network at least in one crystalline form has a much higher ability for polymorphism than the other two conformations. Thus, 10 polymorphs with essentially different crystal packing were found for this calixarene including a unique tetramorphism with four consecutive melting points of guest-free polymorph and corresponding three crystallization ranges. This ability of 1,3-alternate calixarene is linked with its other smart property: selective crystallization of its compact glass in vapors of binary liquid mixtures, which can be used for visual detection of very small benzene impurities (0.5% (v/v)) in cyclohexane. | |
dc.relation.ispartofseries | Crystal Growth and Design | |
dc.title | Smart Polymorphism of Thiacalix[4]arene with Long-Chain Amide Containing Substituents | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 6 | |
dc.relation.ispartofseries-volume | 17 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 3512 | |
dc.source.id | SCOPUS15287483-2017-17-6-SID85020292422 |