Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
6.7
4.6
Journals
Molecules
Special Issues
Recovery and Optical Application of Noble Metals Compound
molecules-logo
Submit to Molecules Review for Molecules Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

Recovery and Optical Application of Noble Metals Compound

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Green Chemistry".

Deadline for manuscript submissions: closed (15 August 2021) | Viewed by 8731

Special Issue Editors

Prof. Dr. Paola Deplano

E-Mail Website
Guest Editor
External Collaborator at Università degli Studi di Cagliari, Cagliari, CA, Italy
Interests: transition metal-complexes; linear and non-linear optics; non-innocent sulphur ligands; donor-acceptor adducts; noble-metals recovery
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Angela Serpe

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering and Architecture (DICAAR), University of Cagliari; research unit of INSTM and Environmental Geology and Geoengineering Institute - National Research Council (IGAG-CNR), Via Marengo 2 - Cagliari, Italy
Interests: critical metal recovery; green leaching systems; sustainable processes; acid and non-acid leaching; noble metal complexes; sustainable catalysts; coordination chemistry; soft and hard ligands; charge transfer complexes; circular economy models

Special Issue Information

Dear Colleagues,

As is well known, noble metals (NMs) represent global valuable and strategical assets and play a critical role in a wide range of conventional (i.e., jewelry, coins, bio-medicine) as well as high-tech fields (i.e., electric and electronic equipment, catalysis, pharmaceuticals, photonics). Specifically speaking about optical applications, NM complexes have largely been demonstrated to behave, when properly designed, as photoactive moieties where light-induced functions can be tuned and controlled by modification of the ligands with an impact on electron and energy transfer processes addressed at molecular switching, signaling, and energetics. The high quest of NMs coupled with the increasing risk of shortage in the supply, both for depletion of natural resources and governance and trade aspects of suppliers, make these metals critical elements and their recovery from scraps highly appealing for economic and environmental purposes. In this framework, this Special Issue of Molecules is devoted to collecting valued contributions on: i) sustainability in NM recovery and recycling via waste enhancement to secondary resources addressed at circular economy models, and ii) molecular engineering of NM complexes to achieve linear and nonlinear optical and stimuli-responsive properties. All scientists working in these fields are warmly invited to submit their works for publication in this Special Issue.

Prof. Dr. Paola Deplano
Prof. Dr. Angela Serpe
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Noble metals
  • Resource efficiency
  • Copper
  • Silver
  • Gold
  • Palladium
  • Platinum
  • Noble metal complexes
  • Optics
  • Nonlinear optics
  • Near-infrared dyes
  • Structure–properties relationship
  • Electronic waste
  • Catalysis
  • Circular economy models
  • Secondary resources
  • Sustainability
  • Green processes

Published Papers (3 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

Jump to: Review

19 pages, 3975 KiB  
Article
Characterization and Structural Insights of the Reaction Products by Direct Leaching of the Noble Metals Au, Pd and Cu with N,N′-Dimethyl-piperazine-2,3-dithione/I2 Mixtures
by Angela Serpe, Luca Pilia, Davide Balestri, Luciano Marchiò and Paola Deplano
Molecules 2021, 26(16), 4721; https://doi.org/10.3390/molecules26164721 - 4 Aug 2021
Cited by 6 | Viewed by 1579
Abstract
In the context of new efficient and safe leaching agents for noble metals, this paper describes the capability of the Me2pipdt/I2 mixture (where Me2pipdt = N,N′-dimethyl-piperazine-2,3-dithione) in organic solutions to quantitatively dissolve Au, Pd, and Cu metal powders [...] Read more.
In the context of new efficient and safe leaching agents for noble metals, this paper describes the capability of the Me2pipdt/I2 mixture (where Me2pipdt = N,N′-dimethyl-piperazine-2,3-dithione) in organic solutions to quantitatively dissolve Au, Pd, and Cu metal powders in mild conditions (room temperature and pressure) and short times (within 1 h in the reported conditions). A focus on the structural insights of the obtained coordination compounds is shown, namely [AuI2(Me2pipdt)]I3 (1), [Pd(Me2pipdt)2]I2 (2a) and [Cu(Me2pipdt)2]I3 (3), where the metals are found, respectively, in 3+, 2+ and 1+ oxidation states, and of [Cu(Me2pipdt)2]BF4 (4) and [Cu(Me2dazdt)2]I3 (5) (Me2dazdt = N,N′-dimethyl-perhydrodizepine-2,3-dithione) compared with 3. Au(III) and Pd(II) (d8 configuration) form square–planar complexes, whereas Cu(I) (d10) forms tetrahedral complexes. Density functional theory calculations performed on the cationic species of 1–5 help to highlight the nature of the bonding in the different complexes. Finally, the valorization of the noble metals-rich leachates is assessed. Specifically, gold metal is quantitatively recovered from the solution besides the ligands, showing the potential of these systems to promote metal recycling processes. Full article
(This article belongs to the Special Issue Recovery and Optical Application of Noble Metals Compound)
►▼ Show Figures

Graphical abstract

Review

Jump to: Research

22 pages, 3185 KiB  
Review
Recent Investigations on Thiocyanate-Free Ruthenium(II) 2,2′-Bipyridyl Complexes for Dye-Sensitized Solar Cells
by Luca Mauri, Alessia Colombo, Claudia Dragonetti, Dominique Roberto and Francesco Fagnani
Molecules 2021, 26(24), 7638; https://doi.org/10.3390/molecules26247638 - 16 Dec 2021
Cited by 11 | Viewed by 2149
Abstract
Three decades ago, dye-sensitized solar cells (DSSCs) emerged as a method for harnessing the energy of the sun and for converting it into electricity. Since then, a lot of work has been devoted to create better global photovoltaic efficiencies and long term stability. [...] Read more.
Three decades ago, dye-sensitized solar cells (DSSCs) emerged as a method for harnessing the energy of the sun and for converting it into electricity. Since then, a lot of work has been devoted to create better global photovoltaic efficiencies and long term stability. Among photosensitizers for DSSCs, thiocyanate-free ruthenium(II) complexes have gained increasing interest due to their better stability compared to conventional thiocyanate-based complexes, such as benchmark dyes N719 and Z907. In this mini-review, two classes of thiocyanate-free Ru(II) complexes are presented: (a) bis-bipyridyl compounds bearing an ancillary cyclometalating bidentate ligand; (b) bipyridyl compounds bearing non-cyclometalating ancillary ligands. The coverage, mainly from 2014 up to now, is not exhaustive, but illustrates the most recent design strategies and photovoltaic properties of these two families of ruthenium(II) dyes. Full article
(This article belongs to the Special Issue Recovery and Optical Application of Noble Metals Compound)
►▼ Show Figures

Figure 1

21 pages, 8814 KiB  
Review
From Waste to Green Applications: The Use of Recovered Gold and Palladium in Catalysis
by Sean McCarthy, Alvin Lee Wei Jie, D. Christopher Braddock, Angela Serpe and James D. E. T. Wilton-Ely
Molecules 2021, 26(17), 5217; https://doi.org/10.3390/molecules26175217 - 28 Aug 2021
Cited by 9 | Viewed by 4298
Abstract
The direct use in catalysis of precious metal recovery products from industrial and consumer waste is a very promising recent area of investigation. It represents a more sustainable, environmentally benign, and profitable way of managing the low abundance of precious metals, as well [...] Read more.
The direct use in catalysis of precious metal recovery products from industrial and consumer waste is a very promising recent area of investigation. It represents a more sustainable, environmentally benign, and profitable way of managing the low abundance of precious metals, as well as encouraging new ways of exploiting their catalytic properties. This review demonstrates the feasibility and sustainability of this innovative approach, inspired by circular economy models, and aims to stimulate further research and industrial processes based on the valorisation of secondary resources of these raw materials. The overview of the use of recovered gold and palladium in catalytic processes will be complemented by critical appraisal of the recovery and reuse approaches that have been proposed. Full article
(This article belongs to the Special Issue Recovery and Optical Application of Noble Metals Compound)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-3
Back to TopTop