4,4′-Sulfonyldiphenol

4,4′-Sulfonyldiphenol also known as Bisphenol S(BPS) is a monomer characterized by its sulfone group (-SO₂-) linking two phenolic rings. Its unique chemical structure imparts high thermal stability, chemical resistance, and tensile strength. It is often used as a monomer or additive in the synthesis of high-performance polymers, particularly polyethersulfones (PES) and polyphenylsulfones (PPSU). It is widely used in the field of polymer synthesis, medical devices, and dental composites.

4,4′-Sulfonyldiphenol can be used:

• As a monomer to synthesize fibrous poly(arylene ether ketone)s with excellent water affinity, thermal stability and film forming capability. This can be utilized to fabricate Proton exchange membranes for electrodialysis, fuel cells and flow batteries.
• As a precursor to prepare polyphosphazene-based contrast agents for magnetic resonance imaging (MRI) and computed tomography (CT). It enhances the thermal stability, chemical resistance and allows easy functionalization of contrast agents.
• As a monomer to prepare poly (cyclotriphosphazene-co-4,4-sulfonyldiphenol) (PZS) coating for separators, in lithium-ion battery. The coated separators show sufficient enhancement of liquid electrolyte wettability and ionic conductivity, resulting in better cycle performance.