Radical‐Induced Hydrosilylation Reactions for the Functionalization of Two‐Dimensional Hydride Terminated Silicon Nanosheets

Abstract

Herein we present the functionalization of freestanding silicon nanosheets (SiNSs) by radical-induced hydrosilylation reactions. An efficient hydrosilylation of Si-H terminated SiNSs can be achieved by thermal initiation or the addition of diazonium salts with a variety of alkene or alkyne derivatives. The radical-induced hydrosilylation is applicable for a wide variety of substrates with different functionalities, improving the stability and dispersibility of the functional SiNSs in organic solvents and potentially opening up new fields of application for these hybrid materials.

Two‐Dimensional Silicon for (Photo)Catalysis

“…Furthermore, to achieve the chemical exfoliation of hydrogen‐terminated silicene with less oxidation, some improvements of the reaction process were made including reduced temperature (−30 °C) for the reaction or using ethanol or other organic solvents to replace water. [ 21 ] Alternatively, the main reactants could be modified or replaced. CaSi 2 could be doped with active metals without severe structure change (e.g., Mg‐doped CaSi 2 [5a] and K‐doped CaSi 2 [ 22 ] ), which endowed redox‐assisted chemical exfoliation with significantly diminished oxidation.…”

Highly stretchable or extremely soft silicone elastomers? One reaction to make them all - from easily available materials!

“…Si-H functional groups are turned into silyl radicals (O(CH3)2Si•) through hydrogen abstraction in the presence of air (Figure 2c-A). 31,32 After further oxidation processes, the silyl radicals are transformed into O(CH3)2SiO• (Figure 2c-B and C). 24 Oxidation processes also happen on methyl groups of silicones: oxygen initially generates a carbon radical (SiCH2•) by hydrogen atom abstraction (Figure 2c-D) 33,34 .…”

Design, characterization, and application of elemental 2D materials for electrochemical energy storage, sensing, and catalysis

“…Several research groups have also developed surface segregation of silicene on ZrB 2 , 151 buckled silicon on Ir(111), 152 stabilization of silicene, 153 freestanding silicon nanosheets (SiNSs) via hydrosilylation reactions, 154 and magnesiothermically induced phase transition of exfoliated silicene nanosheets 155 to successfully synthesize silicene.…”