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Electrocatalysis/Photocatalysis in Organic Synthesis

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

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 919

Special Issue Editors

Centro de Química Estrutural e Departamento de Engenharia Química, Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Interests: green chemistry; innovative product design; sustainable processes; functionalized materials (in particular, involving C-scorpionates); catalysis (homogeneous, supported or nano- catalysis); electrochemistry
Special Issues, Collections and Topics in MDPI journals
Wuttig Research Group, University of Chicago, Chicago, IL, USA
Interests: electrocatalysis; photocatalysis; molecule catalysts; carbon-carbon bond formation; porphyrin

Special Issue Information

Dear Colleagues,

This Special Issue is focused on photochemical and electrochemical applications for organic synthesis. Chemical bond formation and breaking in the presence of photo-/electrocatalysts enable the green transformation of organic molecules under sustainable and mild conditions. Over the past decade, challenging bond formations, including cross-coupling reactions, (de)halogenation, and atom insertion/deletion, have been achieved via such methods. Various classes of homogeneous and heterogenous catalysts are developed for selective and robust catalysis with different substrates under quite diverse environments. However, further investigation is still required to solve critical issues, such as back-electron transfer, inactive chemical bonds, the energy-transformation rate, and the scaling up of reactions. Under these circumstances, this Special Issue welcomes all kinds of original works, including, but not limited to, the design/selection of electro-/photocatalysts, expanding the tolerance of reactions, and the exploration of reaction mechanisms. 

Prof. Dr. Luísa Margarida Martins
Dr. Qiucheng Chen
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

  • photocatalysts
  • electrocatalysts
  • organic synthesis

Published Papers (1 paper)

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Research

20 pages, 5962 KiB  
Article
Thioxanthone-Based Siloxane Photosensitizer for Cationic/Radical Photopolymerization and Photoinduced Sol–Gel Reactions
by Thi-Thanh-Tam Nguyen, Louise Breloy, Agustin Rios De Anda, Hassan Hayek, Annalisa Chiappone, Jean-Pierre Malval, Daniel Grande and Davy-Louis Versace
Molecules 2024, 29(1), 255; https://doi.org/10.3390/molecules29010255 - 03 Jan 2024
Viewed by 647
Abstract
In this investigation, a multifunctional visible-light TX-based photosensitizer containing a siloxane moiety (TXS) was designed with a good overall yield of 54%. The addition of a siloxane moiety enabled the incorporation of a TX photosensitizer into a siloxane network by photoinduced sol–gel chemistry, [...] Read more.
In this investigation, a multifunctional visible-light TX-based photosensitizer containing a siloxane moiety (TXS) was designed with a good overall yield of 54%. The addition of a siloxane moiety enabled the incorporation of a TX photosensitizer into a siloxane network by photoinduced sol–gel chemistry, thus avoiding its release. Both liquid 1H and solid-state 29Si NMR measurements undeniably confirmed the formation of photoacids resulting from the photolysis of the TXS/electron acceptor molecule (Iodonium salt), which promoted the photoinduced hydrolysis/condensation of the trimethoxysilane groups of TXS, with a high degree of condensation of its inorganic network. Notably, the laser flash photolysis, fluorescence, and electron paramagnetic resonance spin-trapping (EPR ST) experiments demonstrated that TXS could react with Iod through an electron transfer reaction through its excited states, leading to the formation of radical initiating species. Interestingly, the TXS/Iod was demonstrated to be an efficient photoinitiating system for free-radical (FRP) and cationic (CP) polymerization under LEDs@385, 405, and 455 nm. In particular, whatever the epoxy monomer mixtures used, remarkable final epoxy conversions were achieved up to 100% under air. In this latter case, we demonstrated that both the photoinduced sol–gel process (hydrolysis of trimethoxysilane groups) and the cationic photopolymerization occurred simultaneously. Full article
(This article belongs to the Special Issue Electrocatalysis/Photocatalysis in Organic Synthesis)
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