DC pole | Wartość | Język |
dc.contributor.author | Kowalik, Patrycja | - |
dc.contributor.author | Bujak, Piotr | - |
dc.contributor.author | Wróbel, Zbigniew | - |
dc.contributor.author | Penkala, Mateusz | - |
dc.contributor.author | Kotwica, Kamil | - |
dc.contributor.author | Maroń, Anna | - |
dc.contributor.author | Pron, Adam | - |
dc.date.accessioned | 2020-10-13T09:08:46Z | - |
dc.date.available | 2020-10-13T09:08:46Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | "Inorganic Chemistry" Vol. 59, iss. 19 (2020), s. 14594–14604 | pl_PL |
dc.identifier.issn | 0020-1669 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/16468 | - |
dc.description.abstract | A semiconducting molecule containing a thiol anchor
group, namely 2-(5-mercaptothien-2-yl)-8-(thien-2-yl)-5-hexylthieno-
[3,4-c]pyrrole-4,6-dione (abbreviated as D-A-D-SH), was designed,
synthesized, and used as a ligand in nonstoichiometric quaternary
nanocrystals of composition Ag1.0In3.1Zn1.0S4.0(S6.1) to give an
inorganic/organic hybrid. Detailed NMR studies indicate that D-AD-
SH ligands are present in two coordination spheres in the organic
part of the hybrid: (i) inner in which the ligand molecules form direct
bonds with the nanocrystal surface and (ii) outer in which the ligand
molecules do not form direct bonds with the inorganic core. Exchange
of the initial ligands (stearic acid and 1-aminooctadecane) for D-A-DSH
induces a distinct change of the photoluminescence. Efficient red
luminescence of nanocrystals capped with initial ligands (λmax = 720 nm, quantum yield = 67%) is totally quenched and green
luminescence characteristic of the ligand appears (λmax = 508 nm, quantum yield = 10%). This change of the photoluminescence
mechanism can be clarified by a combination of electrochemical and spectroscopic investigations. It can be demonstrated by cyclic
voltammetry that new states appear in the hybrid as a consequence of D-A-D-SH binding to the nanocrystals surface. These states
are located below the nanocrystal LUMO and above its HOMO, respectively. They are concurrent to deeper donor and acceptor
states governing the red luminescence. As a result, energy transfer from the nanocrystal HOMO and LUMO levels to the ligand
states takes place, leading to effective quenching of the red luminescence and appearance of the green one. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/pl/ | * |
dc.subject | Luminescence | pl_PL |
dc.subject | Ligands | pl_PL |
dc.subject | Photoluminescence | pl_PL |
dc.subject | Electrical conductivity | pl_PL |
dc.subject | Nanocrystals | pl_PL |
dc.title | From red to green luminescence via surface functionalization. Effect of 2-(5-mercaptothien-2-yl)-8-(thien-2-yl)-5-hexylthieno[3,4-c]pyrrole-4,6-dione ligands on the photoluminescence of alloyed Ag-In-Zn-S nanocrystals | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.identifier.doi | 10.1021/acs.inorgchem.0c02468 | - |
Pojawia się w kolekcji: | Artykuły (WNŚiT)
|