Pd(PDip): Cubic, Unsaturated, Zerovalent

Overview

Journal Adv Sci (Weinh)

Specialty Biomedical Engineering

Date 2024 Apr 18

PMID 38634573

Authors

Kevin Breitwieser

Matteo Bevilacqua

Sneha Mullassery

Fabian Dankert

Bernd Morgenstern

Samuel Grandthyll

Frank Muller

Andrea Biffis

Christian Hering-Junghans

Dominik Munz

Affiliations

Soon will be listed here.

Abstract

Atomically precise nanoclusters hold promise for supramolecular assembly and (opto)electronic- as well as magnetic materials. Herein, this work reports that treating palladium(0) precursors with a triphosphirane affords strongly colored Pd(PDip) that is fully characterized by mass spectrometry, heteronuclear and Cross-Polarization Magic-Angle Spinning (CP-MAS) NMR-, infrared (IR), UV-vis, and X-ray photoelectron (XP) spectroscopies, single-crystal X-Ray diffraction (sc-XRD), mass spectrometry, and cyclovoltammetry (CV). This coordinatively unsaturated 104-electron Pd(0) cluster features a cubic Pd-core, µ-capping phosphinidene ligands, and is air-stable. Quantum chemical calculations provide insight to the cluster's electronic structure and suggest 5s/4d orbital mixing as well as minor Pd─P covalency. Trapping experiments reveal that cluster growth proceeds via insertion of Pd(0) into the triphosphirane. The unsaturated cluster senses ethylene and binds isocyanides, which triggers the rearrangement to a tetrahedral structure with a reduced frontier orbital energy gap. These experiments demonstrate facile cluster manipulation and highlight non-destructive cluster rearrangement as is required for supramolecular assembly.

Citing Articles

Pd(PDip): Cubic, Unsaturated, Zerovalent.

Breitwieser K, Bevilacqua M, Mullassery S, Dankert F, Morgenstern B, Grandthyll S Adv Sci (Weinh). 2024; 11(25):e2400699.

PMID: 38634573 PMC: 11220702. DOI: 10.1002/advs.202400699.

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