Details

Autor(en) / Beteiligte

• Canton-Vitoria, Ruben
• Sayed-Ahmad-Baraza, Yuman
• Pelaez-Fernandez, Mario
• Arenal, Raul
• Bittencourt, Carla
• Ewels, Christopher P.
• Tagmatarchis, Nikos

Titel

Functionalization of MoS2 with 1,2-dithiolanes: toward donor-acceptor nanohybrids for energy conversion

Ist Teil von

• NPJ 2D materials and applications, 2017-12, Vol.1 (1), p.1-9, Article 13

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2017

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Abstract The covalent functionalization of exfoliated semiconducting MoS 2 by 1,2-dithiolanes bearing an ethylene glycol alkyl chain terminated to a butoxycarbonyl-protected amine and a photoactive pyrene moiety is accomplished. The MoS 2 -based nanohybrids were fully characterized by complementary spectroscopic, thermal, and microscopy techniques. Markedly, density functional theoretical studies combined with X-ray photoelectron spectroscopy analysis demonstrate preferential edge functionalization, primarily via sulfur addition along partially sulfur saturated zig-zag MoS 2 molybdenum-edges, preserving intact the 2D basal structure of functionalized MoS 2 -based nanohybrids as confirmed by high-resolution transmission electron microscopy and electron energy loss spectroscopy. Furthermore, in the MoS 2 -pyrene hybrid, appreciable electronic interactions at the excited state between the photoactive pyrene and the semiconducting MoS 2 were revealed as inferred by steady-state and time-resolved photoluminescence spectroscopy, implying its high potentiality to function in energy conversion schemes.