Dr Youngsuk KIM

Department of Chemistry, Pusan National University, South Korea
E-mail: youngsuk.kim@pusan.ac.kr

Carbene-Derived Sulfur-Based Radicals and Their Applications

Singlet carbenes are well-known for their ability to stabilize various main-group radicals; however, carbene-derived, sulfur-based radicals remain rare. In this presentation, I will highlight two advances in carbene-stabilized sulfur radical chemistry. First, I will report the synthesis and characterization of novel diradical complexes featuring sulfur-based radical ligands derived from carbene–CS₂ adducts. These complexes exhibit an open-shell singlet ground state, confirmed through spectroscopic analysis, computational studies, and proton NMR relaxometry, with the unpaired electrons antiferromagnetically coupled on each ligand. The complexes display ligand-centered redox behavior, demonstrating the redox-active nature of these sulfur-based radical ligands. Second, I will introduce a new class of stable sulfide radical cations. Sulfide radical cations have recently garnered significant attention as key intermediates in both organic synthesis and in biological electron transfer processes. We have successfully synthesized exceptionally stable sulfide radical cations supported by two cyclic (alkyl)(amino)carbene moieties. These radical cations, characterized through EPR spectroscopy, X-ray crystallography, and DFT calculations, show remarkable stability to air, water, various chemical reagents, and elevated temperatures. Overall, this work not only establishes a new class of stable sulfur-based radicals but also demonstrates how strategic molecular design can enhance the stability of inherently reactive species.

2026 conferences and events

New: All conferences begin at 9:30 a.m. and are accompanied by a welcome coffee at 9:00 a.m. 

• January, 9: Dr Kévin Antraygues, LCC new member seminar.
• January, 23: Dr Jeanne Crassous, Institut des Sciences Chimiques de Rennes
• February, 20: Dr Xavier Guinchard, Institut Chimie des Substances Naturelles (ICSN), Gif/Yvette
• March, 20: Pr Anna Proust, IPCM, Sorbonne Université
• April, 10: Pr Thomas Ward, Department of Chemistry, University of Basel.
• May, 22: Flore Nardella, LCC new member seminar.
• May, 29: Dr Jérôme Canivet, IRCELYON.
• June, 19: Pr Nicolas Giuseppone, Institut Charles Sadron, Université de Strasbourg.
• September, 18: Prof. Avelino Corma, Instituto de Tecnología Química (UPV-CSIC), Espagne.
• October, 16: Dr Florence Gazeau, laboratoire NABI, Université Paris Cité/CNRS/INSERM.
• November, 13: Dr Didier Gigmes, Institut de Chimie Radicalaire, Marseille.
• December, 11: Pr Inke Siewert, Universität Göttingen.

2025 conferences and events

• January, 24: Ally Aukauloo
• January, 31: Inhar Imaz
• March, 07: Gwenael Rapenne
• March, 14: Tomislav Frisic
• April, 04: Marc-Etienne Moret
• May, 16: Clément Mazet
• May, 23: Jason Holland
• 06 juin : Vincent Robert
• June, 13: Atsuhi Urakawa
• June, 17: Evamarie Hey-Hawkins
• June, 27: Marie Lopez
• September, 01: Takashi Matsuo (avec le CEMES, Gwenael Rapenne)
• September, 05: Yohei Shimizu (avec le LHFA, Daniel Pla)
• September, 12: Dominique Munz
• September, 19: Nadine Millot
• September, 19:Frederik Wurm
• October, 10: Géraldine Masson (avec le LSPCMIB)

2024 conferences and events

• January, 26: Pr Matthew Fuchter
• February, 2: Raphael Rodriguez
• March, 1: Véronique Gouverneur (LCC/SPCMIB/EVOTEC)
• March, 15: Manfred Scheer
• March, 21: Takato Mitsudome
• March, 22: ½ Journée scientifique du LCC
• March, 29: Rhett Kempe
• April, 5: Journée Chimie-Biologie
• April, 19: Krzysztof Matyjaszewski
• April, 26: ½ Journée scientifique du LCC
• May, 14 : Javier Perez-Rodriguez
• May, 24: Karl Kirchner
• May, 31: Kim Spielman
• June, 7: Ingo Ott
• June, 11: Mrigendra Dubey
• June, 14: Jordi García-Antón
• June, 21: Journée scientifique Bernard Meunier
• July, 1: Xiangyang Shi
• July, 3: Eric Benoist
• September, 6: Bidyut Sarma
• September, 12: Guy Bertrand
• September, 13: Clément Camp
• September, 20: ½ Journée scientifique du LCC
• September, 23: Kallol Ray
• September, 27: Rémi Métivier
• October, 4: Albrecht Berkessel
• October, 10-11: 50 ans du LCC
• October, 18: Joost Reek
• October, 22: Gwilherm Evano – canceled
  
• November, 6: Basker Sundararaju
• November, 8: Journée Scientifique des Non-Permanents du LCC
• November, 15: Tatiana Vogt
• November, 29: Inar Imaz (Note the change of date: January, the 31st!)
  
• December, 6: ½ Journée scientifique du LCC

2023 conferences and events

• September 7: Hirotomo Nishihara (Team C)
• September 15: Anna Kajetanowicz (Team A)
• September 22: Nicolas Queyriaux
• September 29: Victor Mougel (Team N)
• October 3: Walter Leitner (LCC/LPCNO)
• October 26: Minisymposium Team G
  (2-6PM : Silvia Gross, Vincent Ladmiral, Renaud Nicolay, Christian Serre)
• November 10: Non-Permanent Staff Day at the LCC (Guest: Jason Love)
• November 20: Evamarie Hey-Hawkins
• November 24: Pr Reverant Crispin
• December 6: Martina Stenzel (CNRS Ambassador for Chemistry)
• December 8: Christophe Bucher
• December 12: Minisymposium Team L
  (Montserrat Gomez, Florence Epron, Catherine Pinel, Claire-Marie  Pradier, Simon Tricard)
• December 14: Minisymposium 15h30-18h (Evamarie Hey-Hawkins, Clara Vinas, Christian Müller, Kirsten Zeitler, Francesc Teixidor)
• December 15: Patrick Gamez