A series of isopropyl-​substituted oligogermanes Pri3Ge(GePh2)​nGePri3 (n = 0-​3) featuring a luminescent and dichroic pentagermane Pri3Ge(GePh2)​3GePri3

Sangeetha Komanduri, Alexander Shumaker, Kimberley Roewe, Melanie Wolf, Frank Uhlig, Curtis E. Moore, Arnold L. Rheingold, Charles S. Weinert*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The series of oligogermanes Pri3Ge(GePh2)nGePri3 (n = 0, 2; n = 1, 3; n = 2, 4; n = 3, 5) were prepared by the hydrogermolysis reaction. All four species were characterized by NMR (1H and 13C) and UV/visible spectroscopy as well by cyclic voltammetry and differential pulse voltammetry. The oligogermanes exhibited a successive red shift in their absorbance maxima as the length of the Ge-Ge chain was increased, and these molecules also became easier to oxidize as the chain length was increased. The X-ray crystal structures of 4 and 5 as well as the trigermane HPh2GeGePh2GePh2H (6) were determined. The pentagermane 5 was shown to be dichroic in the solid state due to the packing of the individual molecules in a columnar fashion in the crystal. Pentagermane 5 is also luminescent in solution, exhibiting an emission maximum at 380 nm. The physical properties of 5, like the hexagermane Pri3Ge(GePh)4GePri3, mimic the properties of the larger polygermane systems.
Original languageEnglish
Pages (from-to)3240 - 3247
JournalOrganometallics
Volume35
Issue number18
DOIs
Publication statusPublished - 6 Sep 2016

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