TY - JOUR
T1 - An efficient multi-gram access in a two-step synthesis to soluble, nine-atomic, silylated silicon clusters
AU - Frankiewicz, Kevin M.
AU - Willeit, Nicole S.
AU - Hlukhyy, Viktor
AU - Fässler, Thomas F.
N1 - Publisher Copyright:
© The Author(s) 2024.
PY - 2024/12
Y1 - 2024/12
N2 - Silicon is by far the most important semiconducting material. However, solution-based synthetic approaches for unsaturated silicon-rich molecules require less efficient multi-step syntheses. We report on a straightforward access to soluble, polyhedral Si9 clusters from the binary phase K12Si17, which contains both [Si4]4− and [Si9]4− clusters. [Si4]4− ions, characterised by a high charge per atom ratio, behave as strong reducing agents, preventing [Si9]4− from directed reactions. By the here reported separation of [Si4]4− by means of fractional crystallisation, Si9 clusters of the precursor phase K12Si17 are isolated as monoprotonated [Si9H]3− ions on a multi-gram scale and further crystallised as their 2.2.2-Cryptate salt. 20 grams of the product can be obtained through this two-step procedure - a new starting point for silicon Zintl chemistry, such as the isolation and structural characterisation of a trisilylated [MeHyp3Si9]− cluster.
AB - Silicon is by far the most important semiconducting material. However, solution-based synthetic approaches for unsaturated silicon-rich molecules require less efficient multi-step syntheses. We report on a straightforward access to soluble, polyhedral Si9 clusters from the binary phase K12Si17, which contains both [Si4]4− and [Si9]4− clusters. [Si4]4− ions, characterised by a high charge per atom ratio, behave as strong reducing agents, preventing [Si9]4− from directed reactions. By the here reported separation of [Si4]4− by means of fractional crystallisation, Si9 clusters of the precursor phase K12Si17 are isolated as monoprotonated [Si9H]3− ions on a multi-gram scale and further crystallised as their 2.2.2-Cryptate salt. 20 grams of the product can be obtained through this two-step procedure - a new starting point for silicon Zintl chemistry, such as the isolation and structural characterisation of a trisilylated [MeHyp3Si9]− cluster.
UR - http://www.scopus.com/inward/record.url?scp=85212790000&partnerID=8YFLogxK
U2 - 10.1038/s41467-024-55211-z
DO - 10.1038/s41467-024-55211-z
M3 - Article
AN - SCOPUS:85212790000
SN - 2041-1723
VL - 15
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 10715
ER -