The Road to Bisacyldigermanes: A New Compound Class Suitable as Visible Light Photoinitiators

Tanja Wiesner, Gabriel Glotz, Odo Wunnicke, David Bleger, Ivana Knezevic, Ana Torvisco Gomez, Roland C. Fischer, Anne-Marie Kelterer, Georg Gescheidt-Demner, Michael Haas*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


In this contribution we present a novel synthetic procedure towards a variety of bisacyldigermanes via the Corey-Seebach approach. All isolated compounds were characterized by NMR spectroscopy, mass spectrometry and X-ray crystallography. The target compounds were further analyzed via UV/Vis absorption spectroscopy and their longest wavelength absorptions were assigned by DFT calculations. Moreover, we determined the activity of our new photoinitiators by photolysis experiments (photobleaching). Additionally, CIDNP spectra confirmed the radical pathway of the investigated compounds.

Original languageEnglish
Article numbere202200107
Issue number9
Early online date6 May 2022
Publication statusPublished - Sept 2022


  • acylgermanes
  • digermanes
  • photoinitiators
  • photolysis
  • structure elucidation

ASJC Scopus subject areas

  • Analytical Chemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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