Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Invariant Photoinduced Energy-Transfer Followed by Electron-Transfer Events in Boron Dipyrromethene Derivatives Covalently Anchored to MoS2 and WS2
Δημιουργός/Συγγραφέας:	Canton-Vitoria, Ruben Shao, Shuai Gobeze, Habtom B Jang, Youngwoo D'Souza, Francis [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos
Ημερομηνία:	2025-12-19
Γλώσσα:	Αγγλικά
ISSN:	1613-6810 1613-6829
DOI:	10.1002/smll.202514112
Άλλο:	41416576
Περίληψη:	We report the covalent functionalization of exfoliated MoS2 and WS2 via a 1,2-dithiolane-based reaction using boron dipyrromethene (BODIPY) derivatives 1a-c featuring either methyl, phenothiazine (PTZ), or triphenylamine (TPA) units at the α-carbons of BODIPY, shifting the light-harvesting capability of the MoS2-based 2a-c and WS2-based 3a-c hybrids from the visible to the near-infrared region. All new hybrids are comprehensively characterized via spectroscopic, thermal, and microscopy imaging techniques. Markedly, femtosecond transient absorption spectroscopy assays revealed a multi-step sequence of events under light illumination, beginning with energy transfer from the BODIPY derivatives to the TMDs, followed by electron-transfer from the excited TMDs to BODIPYs, forming a thermodynamically stable charge-separated state TMD• +-BODIPY•-. Interestingly, while the presence of electron-donating substituents of PTZ and TPA in BODIPY derivatives 1b-c partially inhibits these processes, all hybrids 2a-c and 3a-c exhibit similar photoinduced electronic behavior, signifying that the electronic interface of MoS2 or WS2 and BODIPYs remains largely unaffected by the specific region of the electromagnetic spectrum from which light is harvested, the nature of TMDs, or their electron-donating/accepting character. While the rates of energy transfer, kENT, from 1BODIPY* to TMD are within the time-resolution of our instrumental setup, the rate of electron transfer, kET, from 1TMD* to BODIPY resulting in TMD• +-BODIPY•- is in the range of 1-2 × 109 s-1, revealing efficient charge separation in these hybrids.
Τίτλος πηγής δημοσίευσης:	Small (Weinheim an der Bergstrasse, Germany)
Θεματική Κατηγορία:	[EL] Φωτοχημεία[EN] Photochemistry [EL] Φασματοσκοπία[EN] Spectroscopy [EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	boron dipyrromethene charge‐separation covalent functionalization electron‐transfer transition metal dichalcogenides
Χρηματοδότης:	US National Science Foundation Hellenic Foundation for Research and Innovation (H.F.R.I.)
Χρηματοδοτικό πρόγραμμα:	2345836 2514911 2482
Κάτοχος πνευματικών δικαιωμάτων:	© 2025 The Author(s). Small published by Wiley-VCH GmbH
Όροι και προϋποθέσεις δικαιωμάτων:	This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1002/smll.202514112
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο