Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	A new computational tool for interpreting the infrared spectra of molecular complexes
Δημιουργός/Συγγραφέας:	Iglesias-Reguant, Alex [EL] Ραϊς, Χεριμπέρτ[EN] Reis, Heribert Medveď, Miroslav Luis, Josep M Zaleśny, Robert
Ημερομηνία:	2023-04-26
Γλώσσα:	Αγγλικά
DOI:	10.1039/d2cp03562f
Άλλο:	37043249
Περίληψη:	The popularity of infrared (IR) spectroscopy is due to its high interpretive power. This study presents a new computational tool for analyzing the IR spectra of molecular complexes in terms of intermolecular interaction energy components. In particular, the proposed scheme enables associating the changes in the IR spectra occurring upon complex formation with individual types of intermolecular interactions (electrostatic, exchange, induction, and dispersion), thus providing a completely new insight into the relations between the spectral features and the nature of interactions in molecular complexes. To demonstrate its interpretive power, we analyze, for selected vibrational modes, which interaction types rule the IR intensity changes upon the formation of two different types of complexes, namely π⋯π stacked (benzene⋯1,3,5-trifluorobenzene) and hydrogen-bonded (HCN⋯HNC) systems. The exemplary applications of the new scheme to these two molecular complexes revealed that the interplay of interaction energy components governing their stability might be very different from that behind the IR intensity changes. For example, in the case of the dispersion-bound π⋯π-type complex, dispersion contributions to the interaction induced IR intensity of the selected modes are notably smaller than their first-order (electrostatic and exchange) counterparts.
Τίτλος πηγής δημοσίευσης:	Physical chemistry chemical physics : PCCP
Τόμος/Κεφάλαιο:	25
Τεύχος:	16
Θεματική Κατηγορία:	[EL] Φασματοσκοπία[EN] Spectroscopy [EL] Χημεία[EN] Chemistry [EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	computational tools complex formations infrared spectrum electrostatics molecular complexes
EU Grant identifier:	2018/30/E/ST4/00457 PGC2018-098212-B-C22 2021SGR00623
Όροι και προϋποθέσεις δικαιωμάτων:	This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1039/D2CP03562F
Εμφανίζεται στις συλλογές:	Ινστιτούτο Χημικής Βιολογίας - Επιστημονικό έργο