Unravelling the origin of dual photoluminescence in Au2Cu6 clusters by triplet sensitization and photon upconversion

2022 ◽  
Author(s):  
Daichi Arima ◽  
Yoshiki Niihori ◽  
Masaaki Mitsui
Keyword(s):  
Noble Metal ◽  
Metal Clusters ◽  
Photophysical Properties ◽  
Single Atom ◽  
Chemical Compositions ◽  
Luminescent Materials

Ligand-protected, noble-metal clusters are promising as luminescent materials and photosensitizers because of their diverse chemical compositions and structures, as well as their easily tunable electronic and photophysical properties with single-atom...

Exciting clusters, what does off-resonance actually mean?

Nanoscale ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 242-252
Author(s):  
Goonay Yousefalizadeh ◽  
Shideh Ahmadi ◽  
Nicholas J. Mosey ◽  
Kevin G. Stamplecoskie
Keyword(s):  
Noble Metal ◽  
Biomedical Imaging ◽  
Metal Clusters ◽  
Photophysical Properties ◽  
New Class

Noble metal clusters have unique photophysical properties, especially as a new class of materials for multiphoton biomedical imaging.

scholarly journals Luminescent Supramolecular Nano- or Microstructures Formed in Aqueous Media by Amphiphile-Noble Metal Complexes

2020 ◽  
Vol 2020 ◽  
pp. 1-24 ◽  
Author(s):  
Carmen Cretu ◽  
Loredana Maiuolo ◽  
Domenico Lombardo ◽  
Elisabeta I. Szerb ◽  
Pietro Calandra
Keyword(s):  
Noble Metal ◽  
Smart Materials ◽  
Self Assembly ◽  
Noble Metals ◽  
Photophysical Properties ◽  
Aqueous Media ◽  
Molecular Architecture ◽  
Stimuli Responsive ◽  
Panoramic View ◽  
Amphiphilic Molecules

The involvement of metal ions within the self-assembly spontaneously occurring in surfactant-based systems gives additional and interesting features. The electronic states of the metal, together with the bonds that can be established with the organic amphiphilic counterpart, are the factors triggering new photophysical properties. Moreover, the availability of stimuli-responsive supramolecular amphiphile assemblies, able to disassemble in a back-process, provides reversible switching particularly useful in novel approaches and applications giving rise to truly smart materials. In particular, small amphiphiles with an inner distribution, within their molecular architecture, of various polar and apolar functional groups, can give a wide variety of interactions and therefore enriched self-assemblies. If it is joined with the opportune presence and localization of noble metals, whose chemical and photophysical properties are undiscussed, then very interesting materials can be obtained. In this minireview, the basic concepts on self-assembly of small amphiphilic molecules with noble metals are shown with particular reference to the photophysical properties aiming at furnishing to the reader a panoramic view of these exciting problematics. In this respect, the following will be shown: (i) the principles of self-assembly of amphiphiles that involve noble metals, (ii) examples of amphiphiles and amphiphile-noble metal systems as representatives of systems with enhanced photophysical properties, and (iii) final comments and perspectives with some examples of modern applications.

Bipolar luminescent materials containing pyrimidine terminals: synthesis, photophysical properties and a theoretical study

RSC Advances ◽  
2013 ◽  
Vol 3 (44) ◽  
pp. 21877 ◽  
Author(s):  
Jiena Weng ◽  
Qunbo Mei ◽  
Quli Fan ◽  
Qidan Ling ◽  
Bihai Tong ◽  
...  
Keyword(s):  
Theoretical Study ◽  
Photophysical Properties ◽  
Luminescent Materials

Noble-Metal-Supported GeS Monolayer as Promising Single-Atom Catalyst for CO Oxidation

2018 ◽  
Vol 122 (26) ◽  
pp. 14488-14498 ◽  
Author(s):  
Sharmistha Karmakar ◽  
Chandra Chowdhury ◽  
Ayan Datta
Keyword(s):  
Co Oxidation ◽  
Noble Metal ◽  
Single Atom

Designing noble metal single-atom-loaded two-dimension photocatalyst for N2 and CO2 reduction via anion vacancy engineering

2020 ◽  
Vol 65 (9) ◽  
pp. 720-725 ◽  
Author(s):  
Peng Zhou ◽  
Yuguang Chao ◽  
Fan Lv ◽  
Jianping Lai ◽  
Kai Wang ◽  
...  
Keyword(s):  
Noble Metal ◽  
Co2 Reduction ◽  
Anion Vacancy ◽  
Single Atom ◽  
Two Dimension

scholarly journals Single-atom nickel confined nanotube superstructure as support for catalytic wet air oxidation of acetic acid

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Chengyu Jin ◽  
Lei Ma ◽  
Wenjing Sun ◽  
Peiwei Han ◽  
Xiangdong Tan ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Catalytic Activity ◽  
Noble Metal ◽  
Intrinsic Property ◽  
Single Atom ◽  
General Strategy ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Ru Nanoparticles

AbstractSingle-atom confined materials (SACMs) have been widely researched as catalysts in many fields within recent years. However, this class of materials may not only serve as a catalyst but also as a support material for certain reactions. Here we propose a general strategy to use SACMs as supports for tuning loaded noble metal (e.g., Ru) nanoparticles with enhanced catalytic activity. As a proof of concept, a nickel single-atom confined nitrogen-doped carbon nanotube (NCNT) superstructure is prepared as a support to load noble metal Ru for catalytic wet air oxidation of acetic acid. Improved catalytic activity with a mineralization rate of ~97.5% is achieved. Further, adsorption configurations based on DFT calculations also confirm our deduction that the introduction of single-atom Ni changes the intrinsic property of NCNTs and affects the loaded active Ru nanoparticles.

Electrochemical CO2 reduction: from nanoclusters to single atom catalysts

2020 ◽  
Vol 4 (3) ◽  
pp. 1012-1028 ◽  
Author(s):  
Fang Lü ◽  
Haihong Bao ◽  
Yuying Mi ◽  
Yifan Liu ◽  
Jiaqiang Sun ◽  
...  
Keyword(s):  
Transition Metal ◽  
Noble Metal ◽  
Co2 Reduction ◽  
Single Atom ◽  
Electrochemical Co2 Reduction

We reviewed recent significant developments of noble-metal or transition-metal-based nanoclusters or single-atom catalysts that have been used in electrocatalytic CO2 reduction.

Chemical Design of Nanostructured Luminescent Materials

2000 ◽  
Vol 628 ◽  
Author(s):  
Thierry Gacoin ◽  
Arnaud Huignard ◽  
Guillaume Counio ◽  
Jean-Pierre Boilot
Keyword(s):  
Manganese Content ◽  
Chemical Environment ◽  
Synthesis Process ◽  
Cds Nanoparticles ◽  
Chemical Compositions ◽  
Luminescent Materials ◽  
Luminescence Efficiency ◽  
Oxide Particles ◽  
Intense Activity ◽  
Rare Earth Doped

ABSTRACTDuring the last 50 years, there has been a considerable amount of work for the elaboration of efficient luminescent materials, most of them dealing with the search for new chemical compositions. Only a very few studies have concerned the study of the influence of the microstructure of the materials on their properties of emission, especially when the grain sizes of the materials are in the nanometer range. On another side, important advances have been performed in colloid chemistry in the last years, especially in the case of II-VI chalcogenides, as a consequence on the intense activity around the physics of quantum confinement in semiconductors.The basic idea of this work is to show that the techniques developed in the case of II-VI nanoparticles could find interesting applications for the elaboration of nanostructured luminescent materials. This is first illustrated in the case of pure CdS nanoparticles, whose properties are deeply affected by their surface state and their chemical environment. Incorporation of manganese in solid solution in the CdS particles drastically changes the emission process, which now essentially depends on the manganese content inside each particle. Finally, the extension of the synthesis process to rare earth doped oxide particles is presented, and the luminescence efficiency is discussed as a function of the size, the structure, and the chemical environment of the particles.

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