Issue 41, 2019

The influence of the FeCp(CO)2+ moiety on the dynamics of the metalloid [Ge9(Si(SiMe3)3)3] cluster in thf: synthesis and characterization by time-resolved absorption spectroscopy

Abstract

A neutral tetrasubstituted Ge9 cluster with a covalently bound transition metal substituent was synthesized successfully via a salt metathesis reaction. Photoexcitation of [Ge9(Si(SiMe3)3)3FeCp(CO)2] induces excited state dynamics of the compound that was analysed by extended broadband fs absorption spectroscopy in the UV-Vis-NIR region. After UV or Vis excitation, an electron is detached from the [Ge9(Si(SiMe3)3)3]-entity and localizes within few hundred fs. Recombination of this cluster-electron-pair occurs in about 7–9 ps. Finally, a third component can be attributed to complete ground state recovery within roughly 150 ps. This is much shorter compared to a longer-lived component within Li[Ge9(Si(SiMe3)3)3], whose transient absorption exceeds the ns timescale after UV excitation. This observation emphasizes a strong influence of the Fe moiety.

Graphical abstract: The influence of the FeCp(CO)2+ moiety on the dynamics of the metalloid [Ge9(Si(SiMe3)3)3]− cluster in thf: synthesis and characterization by time-resolved absorption spectroscopy

Supplementary files

Article information

Article type
Paper
Submitted
17 Maijs 2019
Accepted
18 Jūl. 2019
First published
18 Jūl. 2019
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2019,48, 15577-15582

The influence of the FeCp(CO)2+ moiety on the dynamics of the metalloid [Ge9(Si(SiMe3)3)3] cluster in thf: synthesis and characterization by time-resolved absorption spectroscopy

N. C. Michenfelder, C. Gienger, A. Schnepf and A. Unterreiner, Dalton Trans., 2019, 48, 15577 DOI: 10.1039/C9DT02091H

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