Počet záznamů: 1
Structure of a monolayer of molecular rotors on aqueous subphase from grazing-incidence X-ray diffraction
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SYSNO ASEP 0495425 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Structure of a monolayer of molecular rotors on aqueous subphase from grazing-incidence X-ray diffraction Tvůrce(i) Kaleta, Jiří (UOCHB-X) RID, ORCID
Wen, Jin (UOCHB-X) RID, ORCID
Magnera, T. F. (US)
Dron, P. I. (US)
Zhu, C. (US)
Michl, Josef (UOCHB-X) RID, ORCIDZdroj.dok. Proceedings of the National Academy of Sciences of the United States of America. - : National Academy of Sciences - ISSN 0027-8424
Roč. 115, č. 38 (2018), s. 9373-9378Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova grazing-incidence X-ray scattering ; X-ray reflectivity ; molecular rotors ; aqueous-surface monolayer ; synchrotron radiation Vědní obor RIV CC - Organická chemie Obor OECD Organic chemistry Institucionální podpora UOCHB-X - RVO:61388963 UT WOS 000447224900035 EID SCOPUS 85053563676 DOI 10.1073/pnas.1712789115 Anotace In situ grazing-incidence X-ray scattering shows that a monolayer of artificial rod-shaped dipolar molecular rotors produced on the surface of an aqueous subphase in a Langmuir trough has a structure conducive to a 2D ferroelectric phase. The axes of the rotors stand an average of 0.83 nm apart in a triangular grid, perpendicular to the surface within experimental error. They carry 2,3-dichlorophenylene rotators near rod centers, between two decks of interlocked triptycenes installed axially on the rotor axle. The analysis is based first on simultaneous fitting of observed Bragg rods and second on fitting the reflectivity curve with only three adjustable parameters and the calculated rotor electron density, which also revealed the presence of about seven molecules of water near each rotator. Dependent on preparation conditions, a minor and variable amount of a different crystal phase may also be present in the monolayer. Pracoviště Ústav organické chemie a biochemie Kontakt asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Jana Procházková, Tel.: 220 183 418 Rok sběru 2019 Elektronická adresa http://www.pnas.org/content/115/38/9373.full
Počet záznamů: 1