Bis[4-(diphenylsulfonio)phenyl]sulfide bis(hexafluoroantimonate)
[CAS# 89452-37-9]

Identification

• Classification: Organic raw materials >> Organometallic compound >> Organic scandium, tantalum, thallium, tungsten, antimony, lanthanum, lead, vanadium, molybdenum, chromium, ytterbium, etc.
• Name: Bis[4-(diphenylsulfonio)phenyl]sulfide bis(hexafluoroantimonate)
• Synonyms: 4,4'-Bis[diphenylsulfonio]phenylsulfide bishexafluoroantimonate
• Molecular Formula: C₃₆H₂₈S₃.2(SbF₆)
• Molecular Weight: 1028.28
• CAS Registry Number: 89452-37-9
• EC Number: 680-222-8
• SMILES: C1=CC=C(C=C1)[S+](C2=CC=CC=C2)C3=CC=C(C=C3)SC4=CC=C(C=C4)[S+](C5=CC=CC=C5)C6=CC=CC=C6.F[Sb-](F)(F)(F)(F)F.F[Sb-](F)(F)(F)(F)F

Safety Data

• Hazard Symbols: GHS07;GHS09 Warning
• Risk Statements: H302+H332-H302-H332-H411
• Safety Statements: P261-P264-P270-P271-P273-P301+P317-P304+P340-P317-P330-P391-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	4	H302
Acute toxicity	Acute Tox.	4	H332
Chronic hazardous to the aquatic environment	Aquatic Chronic	2	H411
Skin sensitization	Skin Sens.	1	H317
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412

• Transport Information: UN 3467

Discovery and Applications

Bis[4-(diphenylsulfonio)phenyl]sulfide bis(hexafluoroantimonate) is a sophisticated compound in the field of photoinitiators, characterized by its utility in polymer chemistry, particularly for UV-curable systems. This compound, belonging to the sulfonium salt family, plays a pivotal role in initiating polymerization processes upon exposure to ultraviolet (UV) light, making it invaluable in various industrial applications.

The discovery of sulfonium salts as effective photoinitiators dates back to the 20th century, as researchers sought compounds capable of initiating polymerization reactions under UV light. Bis[4-(diphenylsulfonio)phenyl]sulfide bis(hexafluoroantimonate] stands out due to its high efficiency and stability. The compound is composed of two diphenylsulfonio groups linked through a sulfide bridge, with each sulfonium ion paired with a hexafluoroantimonate anion. The structure ensures solubility in organic solvents and stability during storage and handling, which are crucial for its industrial applications.

One of the primary applications of bis[4-(diphenylsulfonio)phenyl]sulfide bis(hexafluoroantimonate) is in the formulation of UV-curable coatings and adhesives. The compound acts as a photoinitiator, absorbing UV light and generating reactive species that trigger the polymerization of monomers. This property is essential in industries such as automotive, electronics, and packaging, where quick curing and durable coatings are required. The compound is particularly effective in initiating the cationic polymerization of epoxy resins, resulting in coatings that are resistant to chemicals, abrasion, and environmental degradation.

In addition to its role in coatings and adhesives, bis[4-(diphenylsulfonio)phenyl]sulfide bis(hexafluoroantimonate) is used in advanced lithographic processes, especially in the semiconductor industry. It aids in creating precise patterns on photoresist materials used in the production of microchips. The ability to generate high-resolution patterns is crucial for the fabrication of intricate electronic components, contributing to the development of advanced microelectronics and nanotechnology.

The compound also finds application in 3D printing, particularly in stereolithography (SLA). SLA technology relies on photoinitiators to cure liquid photopolymer resins layer by layer. The high efficiency of bis[4-(diphenylsulfonio)phenyl]sulfide bis(hexafluoroantimonate] ensures accurate polymerization, which is critical for producing detailed and precise 3D-printed objects used in prototyping and manufacturing.

Despite its advantages, the use of bis[4-(diphenylsulfonio)phenyl]sulfide bis(hexafluoroantimonate) raises environmental and safety concerns. The hexafluoroantimonate anion, a fluorinated compound, poses challenges regarding environmental impact and potential health risks. As such, research is ongoing to develop alternative photoinitiators that are more environmentally friendly while maintaining or enhancing performance characteristics.

References

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