Silanediylium is a typical divalent silicon cation with strong electrophilic activity and unique electronic structure. It is widely used in fundamental inorganic chemistry and organosilicon chemistry research fields. It acts as core active intermediate to explore the formation mechanism of silicon-based compounds and study the reaction rules of low-valent silicon ions. In catalytic chemistry, it serves as high-strength Lewis acid catalyst to participate in C-H bond activation, olefin rearrangement and small molecule activation reactions, effectively lowering reaction activation energy and improving reaction selectivity. It is commonly applied in the preparation of novel organosilicon functional materials and silicon-containing coordination complexes, guiding the synthesis of new silicon-based polymer precursors. In semiconductor industry research, it can be used as ionic precursor for low-temperature deposition of silicon thin films, helping optimize semiconductor material preparation process. Besides, it plays an important role in atmospheric chemical reaction simulation and cosmic molecular research, and is also adopted to develop new silicon-based energy storage materials and high-efficiency chemical sensors. With distinctive ionic reactivity, it has irreplaceable research value in cutting-edge chemical material development and new reaction route exploration.

Silanediylium belongs to highly reactive hazardous ionic substance with great potential safety risks in operation and research. Inhalation of its gaseous state will severely irritate human respiratory tract and mucous membrane, cause cough, chest tightness and respiratory discomfort, and may induce serious respiratory lesions under long-term exposure. Direct contact with skin will trigger rapid chemical stimulation and corrosion reaction, easily lead to skin redness, swelling, burning pain and tissue damage. Once it splashes into eyes, it will cause severe conjunctival injury and corneal erosion, and even affect normal vision in severe cases. Accidental ingestion will strongly stimulate digestive tract organs and cause acute gastrointestinal poisoning symptoms. This substance reacts violently with water, releasing flammable hydrogen and producing toxic silicon-containing derivatives, and it is easy to induce combustion and explosion when encountering open fire and strong oxidants. Operators must wear fully enclosed chemical protective clothing, gas respirator and anti-corrosion gloves during operation, and carry out all experiments in professional vacuum sealed laboratory. Waste gas and residual reactants must be treated by professional harmless disposal method, and it is strictly prohibited to discharge randomly to avoid causing serious harm to human body and ecological environment.