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Dynamic Tuning of the Bandgap of CdSe Quantum Dots through Redox-Active Exciton-Delocalizing N-Heterocyclic Carbene Ligands

https://doi.org/10.1021/jacs.1c12842

Westmoreland, Dana E.; López-Arteaga, Rafael; Kantt, Leanna Page; Wasielewski, Michael R.; Weiss, Emily A. (March 2022, Journal of the American Chemical Society)

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N-Heterocyclic Carbenes as Reversible Exciton-Delocalizing Ligands for Photoluminescent Quantum Dots

https://doi.org/10.1021/jacs.9b13605

Westmoreland, Dana E.; López-Arteaga, Rafael; Weiss, Emily A. (February 2020, Journal of the American Chemical Society)

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Mechanism of Long-Range Energy Transfer from Quantum Dots to Black Phosphorus

https://doi.org/10.1021/acs.jpcc.1c04562

Padgaonkar, Suyog; Brown, Paul T.; Jeong, Yeonjun; Cherqui, Charles; Avanaki, Kobra N.; López-Arteaga, Rafael; Irgen-Gioro, Shawn; Wu, Yue; Sangwan, Vinod K.; Schatz, George C.; et al (July 2021, The Journal of Physical Chemistry C)

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Trifluoromethylation of 2D Transition Metal Dichalcogenides: A Mild Functionalization and Tunable p‐Type Doping Method

https://doi.org/10.1002/anie.202403494

Kerwin, Brendan; Liu, Stephanie_E; Sadhukhan, Tumpa; Dasgupta, Anushka; Jones, Leighton_O; López‐Arteaga, Rafael; Zeng, Thomas_T; Facchetti, Antonio; Schatz, George_C; Hersam, Mark_C; et al (April 2024, Angewandte Chemie International Edition)

Abstract Chemical modification is a powerful strategy for tuning the electronic properties of 2D semiconductors. Here we report the electrophilic trifluoromethylation of 2D WSe₂and MoS₂under mild conditions using the reagent trifluoromethyl thianthrenium triflate (TTT). Chemical characterization and density functional theory calculations reveal that the trifluoromethyl groups bind covalently to surface chalcogen atoms as well as oxygen substitution sites. Trifluoromethylation induces p‐type doping in the underlying 2D material, enabling the modulation of charge transport and optical emission properties in WSe₂. This work introduces a versatile and efficient method for tailoring the optical and electronic properties of 2D transition metal dichalcogenides.
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