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Silver nanoparticles linked by a Pt-containing organometallic dithiol bridge: study of local structure and interface by XAFS and SR-XPS
- Source :
- PCCP. Physical chemistry chemical physics, 16 (2014): 11719–11728. doi:10.1039/c4cp01264j, info:cnr-pdr/source/autori:Battocchio, C.; Fratoddi, I.; Fontana, L.; Bodo, E.; Porcaro, F.; Meneghini, C.; Pis, I.; Nappini, S.; Mobilio, S.; Russo, M. V.; Polzonetti, G./titolo:Silver nanoparticles linked by a Pt-containing organometallic dithiol bridge: study of local structure and interface by XAFS and SR-XPS/doi:10.1039%2Fc4cp01264j/rivista:PCCP. Physical chemistry chemical physics (Print)/anno:2014/pagina_da:11719/pagina_a:11728/intervallo_pagine:11719–11728/volume:16
- Publication Year :
- 2014
-
Abstract
- Silver nanoparticles (AgNPs) functionalized with an organometallic bifunctional thiol containing Pt(ii) centers, generated in situ from trans-trans-[thioacetyl-bistributylphosphine-diethynylbiphenyl-diplatinum(ii)], were synthesized with different sulphur/metal molar ratios (i.e. AgNPs-1 and AgNPs-2) with the aim to obtain nanosystems of different mean size and self-organization behaviour. AgNPs spontaneously self-assemble, giving rise to 2D networks, as previously assessed. In this work a deeper insight into the chemico-physical properties of these AgNPs is proposed by means of synchrotron radiation induced X-ray photoelectron spectroscopy (SR-XPS) and X-ray absorption fine structure spectroscopy (XAFS) techniques. The results are discussed in order to probe the interaction at the interface between a noble metal and a thiol ligand at the atomic level and the aim of this study is to shed light on the chemical structure and self-organization details of nanosystems. The nature of the chemical interaction between the dithiol ligand and the Ag atoms on the nanoparticle surface was investigated by combining SR-XPS (S2p, Ag3d core levels) and XAS (S and Ag K-edges) analysis. UV-visible absorption and emission measurements were also carried out on all samples and compared with TD-DFT calculations so as to get a better understanding of their optical behavior and establish the nature of the excitation and emission processes.
- Subjects :
- Silver
Gold nanoparticle
Organoplatinum Compounds
Inorganic chemistry
Metal Nanoparticles
General Physics and Astronomy
Nanoparticle
engineering.material
Silver nanoparticle
chemistry.chemical_compound
X-ray photoelectron spectroscopy
NANOSTRUCTURED POLYMETALLAYNES
Sulfhydryl Compounds
Physical and Theoretical Chemistry
Spectroscopy
X-ray absorption spectroscopy
Molecular Structure
Photoelectron Spectroscopy
Dithiol
X-ray absorption fine structure
X-Ray Absorption Spectroscopy
chemistry
engineering
Thiol
Quantum Theory
Physical chemistry
Noble metal
Synchrotrons
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- PCCP. Physical chemistry chemical physics, 16 (2014): 11719–11728. doi:10.1039/c4cp01264j, info:cnr-pdr/source/autori:Battocchio, C.; Fratoddi, I.; Fontana, L.; Bodo, E.; Porcaro, F.; Meneghini, C.; Pis, I.; Nappini, S.; Mobilio, S.; Russo, M. V.; Polzonetti, G./titolo:Silver nanoparticles linked by a Pt-containing organometallic dithiol bridge: study of local structure and interface by XAFS and SR-XPS/doi:10.1039%2Fc4cp01264j/rivista:PCCP. Physical chemistry chemical physics (Print)/anno:2014/pagina_da:11719/pagina_a:11728/intervallo_pagine:11719–11728/volume:16
- Accession number :
- edsair.doi.dedup.....b7390bb0eef66eb9b2a77d88bf865606
- Full Text :
- https://doi.org/10.1039/c4cp01264j