Počet záznamů: 1
The Scope of Direct Alkylation of Gold Surface with Solutions of C-1-C-4 n-Alkylstannanes
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SYSNO ASEP 0450212 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The Scope of Direct Alkylation of Gold Surface with Solutions of C-1-C-4 n-Alkylstannanes Tvůrce(i) Kaletová, Eva (UOCHB-X) RID
Kohutová, Anna (UOCHB-X)
Hajduch, Jan (UOCHB-X) RID
Kaleta, Jiří (UOCHB-X) RID, ORCID
Bastl, Zdeněk (UFCH-W) RID, ORCID
Pospíšil, Lubomír (UFCH-W) RID, ORCID
Stibor, Ivan (UOCHB-X)
Magnera, T. F. (US)
Michl, Josef (UOCHB-X) RID, ORCIDCelkový počet autorů 9 Zdroj.dok. Journal of the American Chemical Society. - : American Chemical Society - ISSN 0002-7863
Roč. 137, č. 37 (2015), s. 12086-12099Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova self-assembled monolayers ; single-molecule junctions ; spectroscopy Vědní obor RIV CC - Organická chemie Vědní obor RIV – spolupráce Ústav fyzikální chemie J.Heyrovského - Fyzikální chemie a teoretická chemie CEP GA14-02337S GA ČR - Grantová agentura ČR Institucionální podpora UOCHB-X - RVO:61388963 ; UFCH-W - RVO:61388955 UT WOS 000361930000042 EID SCOPUS 84942292031 DOI 10.1021/jacs.5b07672 Anotace Treatment of cleaned gold surfaces with dilute tetrahydrofuran or chloroform solutions of tetraalkylstannanes (alkyl = methyl, ethyl, n-propyl, n-butyl) or di-n-butylmethylstannyl tosylate under ambient conditions causes a self-limited growth of disordered monolayers consisting of alkyls and tin oxide. Extensive use of deuterium labeling showed that the alkyls originate from the stannane and not from ambient impurities, and that trialkylstannyl groups are absent in the monolayers, contrary to previous proposals. Methyl groups attached to the Sn atom are not transferred to the surface. Ethyl groups are transferred slowly, and propyl and butyl rapidly. In all cases, tin wide is codeposited in submonolayer amounts. The monolayers were characterized by ellipsometry, contact angle goniometry, polarization modulated IR reflection absorption spectroscopy, X-ray photoelectron spectroscopy, and electrochemical impedance spectroscopy with ferrocyanide/ferricyanide, which revealed a very low charge-transfer resistance. The thermal stability of the monolayers and their resistance to solvents are comparable with those of an n-octadecanethiol monolayer. A preliminary examination of the kinetics of monolayer deposition from a THE solution of tetra-n-butylstannane revealed an approximately half-order dependence on the bulk solution concentration of the stannane, hinting that more than one alkyl can be transferred from a single stannane molecule. A detailed structure of the attachment of the alkyl groups is not known, and it is proposed that it involves direct single or multiple bonding of one or more C atoms to one or more Au atoms. 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 2016 Elektronická adresa http://pubs.acs.org/doi/10.1021/jacs.5b07672
Počet záznamů: 1