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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

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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

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Publication details

The article was received on 17 May 2019, accepted on 18 Jul 2019 and first published on 18 Jul 2019


Article type: Paper
DOI: 10.1039/C9DT02091H
Dalton Trans., 2019, Advance Article
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    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, Advance Article , DOI: 10.1039/C9DT02091H

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