Reversible Piezochromism of Platinum(II) and Palladium(II) Dimers in Molecular Single Crystals
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2025-01-23 |
| Journal | Nano Letters |
| Authors | Paul Steeger, Tobias Theiss, Dominik Schwab, IvƔn Maisuls, S. V. U. Vedhanth |
| Institutions | CeNTech, European Synchrotron Radiation Facility |
| Citations | 1 |
Abstract
Section titled āAbstractāTransition metal complexes are well-known for their efficient light emission and are promising for applications ranging from bioimaging to light-emitting diodes. In solution, interactions between the metal centers of two complexes become possible and drastically change the photophysical properties. For real-world devices, solid-state materials consisting of these molecules are preferable. Recently, the ligand-controlled aggregation of platinum(II) and palladium(II) complexes into molecular single crystals and the controlled formation of metal-metal contacts have been demonstrated. Here, we show how the metal-metal distance can be tuned in a controlled way by exerting pressure on the molecular crystal. Using optical spectroscopy inside a diamond anvil cell, we find strong and reversible piezochromism up to 18 GPa. Using time-dependent density functional theory, we attribute the wavelength shift to a reduction in the metal-metal distance and enhanced Ļ orbital overlap in the dimers.