Experimental and Theoretical Study of the Ultrafast Dynamics of a Ni2 Dy2 -Compound in DMF After UV/Vis Photoexcitation

Stefan Sold; Bharadwaj C Mummaneni; Nadine C Michenfelder; Yan Peng; Annie K Powell; Andreas-Neil Unterreiner; Georgios Lefkidis; Wolfgang Hübner

doi:10.1002/open.202200086

Experimental and Theoretical Study of the Ultrafast Dynamics of a Ni₂ Dy₂ -Compound in DMF After UV/Vis Photoexcitation

ChemistryOpen. 2022 May;11(5):e202200086. doi: 10.1002/open.202200086.

Authors

Stefan Sold¹, Bharadwaj C Mummaneni¹, Nadine C Michenfelder², Yan Peng^{3

4}, Annie K Powell^{3

4}, Andreas-Neil Unterreiner², Georgios Lefkidis^{1

5}, Wolfgang Hübner¹

Affiliations

¹ Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, P.O. Box 3049, 67653, Kaiserslautern, Germany.
² Institute of Physical Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 2, 76131, Karlsruhe, Germany.
³ Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131, Karlsruhe, Germany.
⁴ Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
⁵ School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an, 710072, China.

Abstract

Invited for this month's cover picture are the groups of Wolfgang Hübner (TU Kaiserslautern, Germany), Annie Powell (Karlsruhe Institut of Technology, Germany), and Andreas-Neil Unterreiner (Karlsruhe Institut of Technology, Germany). The cover picture shows the Dy₂ Ni₂ -molecular magnet being excited with a UV/Vis laser pulse, together with its time-resolved spectrum after the pulse. The comparison of the theoretical and the experimental spectra together with both the observed and the calculated relaxation times reveal, among others, three key points: the intermediate states participating in the laser-induced dynamics, the partial metal-to-oxygen charge-transfer excitations, and the order of magnitude of the coupling of the molecular magnet to the thermal bath of the environment. Read the full text of their Full Paper at 10.1002/open.202100153.