Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Managing photoinduced electronic interactions on a molybdenum disulfide/diblock copolymer/anionic porphyrin nanoensemble
Δημιουργός/Συγγραφέας:	Karantanais, Grigoris Minadakis, Michail P. Chrysostomou, Varvara Ojeda-Galvan, Hiram J. Quintana, Mildred [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos
Ημερομηνία:	2024
Γλώσσα:	Αγγλικά
ISSN:	09277757
DOI:	10.1016/j.colsurfa.2023.132755
Περίληψη:	Exploring the modular nature of MoS2 and its ability to be easily functionalized, both in covalent and non-covalent ways and with a variety of chemical species, a MoS2/diblock copolymer system was conceptualized. As the constituents of this diblock copolymer, the poly(benzyl methacrylate), abbreviated as pBzMA, block was designed to serve as the immobilization point of the polymeric chains onto the MoS2 lattice, taking advantage of the S-π non-covalent interactions between phenyl rings and ample S atoms, while the quaternized poly(dimethylamino-ethyl methacrylate), abbreviated as QpDMAEMA, was incorporated as the second block to capture the tetrasulfo-tetraphenyl anionic porphyrin, abbreviated as TPPS4 via electrostatic interactions with the ammonium groups of the quaternized polymeric chain. The so-formed MoS2/QpDMAEMA-b-pBzMA/TPPS4 ensemble was characterized and assessed via spectroscopic (UV-Vis), electron microscopy imaging (TEM) and dynamic light scattering (DLS) techniques. Markedly, efficient quenching of the characteristic fluorescence of the porphyrin species by the MoS2 nanosheets was observed, suggesting the development of photoinduced charge-transfer phenomena within the MoS2/QpDMAEMA-b-pBzMA/TPPS4 ensemble. This was further corroborated by time-correlated single photon counting (TCSPC) and blank experiments, signifying the role of Coulombic interactions for bringing into electronic communication the porphyrin moieties with MoS2. Overall, this rationally designed nanoensemble based on non-covalently modified MoS2 with polymers and photoactive species sets the foundations for inexpensive yet potent systems to be used in energy-related applications.
Τίτλος πηγής δημοσίευσης:	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Τόμος/Κεφάλαιο:	682
Θεματική Κατηγορία:	[EL] Νανοτεχνολογία[EN] Nanotechnology [EL] Χημική μηχανική[EN] Chemical engineering
Λέξεις-Κλειδιά:	block copolymers charge-transfer molybdenum disulfide non-covalent functionalization porphyrins RAFT polymerization
Κάτοχος πνευματικών δικαιωμάτων:	© 2023 Published by Elsevier B.V
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1016/j.colsurfa.2023.132755
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο