Highly Luminescent Ag–In–Zn–S Quaternary Nanocrystals: Growth Mechanism and Surface Chemistry Elucidation

Piotr Bujak , Zbigniew Wróbel , Mateusz Penkala , Kamil Kotwica , Angelika Kmita , M. Gajewska , Andrzej Ostrowski , Patrycja Kowalik , Adam Proń


The presented research is focused on the synthesis of alloyed Ag–In–Zn–S colloidal nanocrystals from a mixture of simple metal precursors such as AgNO3, InCl3, zinc stearate combined with 1-dodecanethiol (DDT), 1-octadecene (ODE), and sulfur dissolved in oleylamine (OLA). In particular, the focus is on the effect of the solvent (ODE vs 1,2-dichlorobenzene (DCB)) and the type of sulfur precursor (S/OLA vs S/n-octylamine (OCA)) on the metal precursors reactivates and on the chemical composition, crystal structure, and luminescent properties of the resulting nanocrystals. The replacement of ODE by DCB as a solvent lowers the reactivity of metal precursors and results in a 3-fold decrease of the photoluminescence quantum yields (Q.Y.) values (from 67% to 21%). This negative effect can be fully compensated by the use of S/OCA as a source of sulfur instead of S/OLA (Q.Y. increases from 21% to 64%). NMR studies of the isolated organic phase indicate that the S/OLA precursor generates two types of ligands being products of (Z)-1-amino-9-octadecene (OLA) hydrogenation. These are “surface bound” 1-aminooctadecane (C18H37NH2) and crystal bound, i.e., alkyl chain covalently bound to the nanocrystal surface via surfacial sulfur (C18H37-NH-S crystal). Highly luminescent Ag–In–Zn–S nanocrystals exhibit a cation-enriched (predominantly indium) surface and are stabilized by a 1-aminooctadecane ligand, which shows more flexibility than OLA. These investigations were completed by hydrophilization of nanocrystals obtained via exchange of the primary ligands for 11-mercaptoundecanoic acid, (MUA) with only a 2-fold decrease of photoluminescence Q.Y. in the most successful case (from 67% to 31%). Finally, through ligand exchange, an electroactive inorganic/organic hybrid was obtained, namely, Ag–In–Zn–S/7-octyloxyphenazine-2-thiol, in which its organic part fully retained its electrochemical activity.
Author Piotr Bujak (FC / CPCT)
Piotr Bujak,,
- Chair Of Polymer Chemistry And Technology
, Zbigniew Wróbel - [Institute of Organic Chemistry of the Polish Academy of Sciences]
Zbigniew Wróbel,,
, Mateusz Penkala - [University of Silesia in Katowice]
Mateusz Penkala,,
, Kamil Kotwica (FC / CPCT)
Kamil Kotwica,,
- Chair Of Polymer Chemistry And Technology
, Angelika Kmita - [AGH University of Science and Technology (AGH)]
Angelika Kmita,,
- Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
, M. Gajewska - [AGH University of Science and Technology (AGH)]
M. Gajewska,,
- Akademia Górniczo-Hutnicza
, Andrzej Ostrowski (FC / CofIC)
Andrzej Ostrowski,,
- Chair Of Inorganic Chemistry
, Patrycja Kowalik (FC / CPCT)
Patrycja Kowalik,,
- Chair Of Polymer Chemistry And Technology
, Adam Proń (FC / CPCT)
Adam Proń,,
- Chair Of Polymer Chemistry And Technology
Journal seriesInorganic Chemistry, ISSN 0020-1669
Issue year2019
Publication size in sheets0.6
ASJC Classification1604 Inorganic Chemistry; 1606 Physical and Theoretical Chemistry
Languageen angielski
wdpb_publikacje_pliki_plik_publikacja_3644_org.pdf 9.1 MB
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 29-04-2020, ArticleFromJournal
Publication indicators Scopus Citations = 1; WoS Citations = 2; GS Citations = 6.0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.092; WoS Impact Factor: 2018 = 4.85 (2) - 2018=4.559 (5)
Citation count*7 (2020-05-27)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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