Towards the photodeposition of Si <sub> <i>x</i> </sub> Ge <sub> <i>y</i> </sub> -type materials <i>via</i> oligomers of cyclogermapentenes and cyclosilapentenes
This article provides an alternative pathway towards cyclosilapentenes (<i>e.g.</i>, SiH2-iPr and SpiroSi) involving the use of Rieke magnesium to activate the requisite dienes for synthesis. Subsequent metal-mediated dehydrocoupling of cyclosilapentene <b>SiH</b><sub><b>2</b></sub><b>-</b><sup><b>i</b></sup><b>Pr</b> and mixtures with another cyclogermapentene gives oligomers with backbone Si-Si (number average molecular weight, <i>M</i><sub>n</sub> = 1.0 kDa) and Si-Ge (<i>M</i><sub>n</sub> = 1.4 kDa) linkages, respectively. UV-irradiation (248 nm) of the abovementioned oligotetrelenes and the molecular spirosilane SpiroSi were examined in solution; while evidence for Si<sub><i>x</i></sub>Ge<sub><i>y</i></sub>-type materials was noted through Raman and EDX spectroscopy, the presence of substantial amorphous carbon as a contaminant was also observed. (TD)-DFT computational studies on the spirosilane SpiroSi provide some insight into the lack of efficient Si<sub><i>x</i></sub>Ge<sub><i>y</i></sub> photodeposition noted in this study.
Authors
- Andres Alejandro Forero Pico (ORCID: https://orcid.org/0000-0002-0067-4924)
- William Medroa del Pino (ORCID: https://orcid.org/0000-0003-3124-7543)
- Abhishek V. Muralidharan (ORCID: https://orcid.org/0009-0001-0944-2812)
- Eric Rivard (ORCID: https://orcid.org/0000-0002-0360-0090)
- Manisha Gupta (ORCID: https://orcid.org/0000-0001-6888-9502)
Institutions
- University of Alberta (CA)
Publication Details
- Journal
- Dalton Transactions
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d4dt03446e
- Citations
- 4
- Primary Topic
- Molecular Junctions and Nanostructures
- Type
- article
- Field-Weighted Citation Impact
- 2.92
Funders
- Canada Foundation for Innovation
- Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada
- Natural Sciences and Engineering Research Council of Canada