4-Sulfocalix[4]arene sodium salt

• CAS: 151657-13-5
• Catalog Number: ACM151657135
• Category: Main Products
• Molecular Weight: 832.67
• Molecular Formula: C₂₈H₂₀Na₄O₁₆S₄
• Synonyms: Calix[4]arene-4-sulfonic acid sodium salt; 25,26,27,28-Tetrahydroxycalix[4]arene-5,11,17,23-tetrasulfonic acid sodium salt
• IUPAC Name: 4-Sulfocalix[4]arene sodium salt
• Melting Point: ≥300ºC(lit.)
• Exact Mass: 831.92200
• Hazard Statements: Xi: Irritant
• Safety Description: 26-36

Case Study

4-Sulfocalix[4]Arene Sodium Salt for Graphene Oxide Macroscopic Film Fabrication

Sundramoorthy, Ashok K., et al. Scientific Reports, 2015, 5(1), 10716.

The amphiphilic molecule 4-sulfocalix[4]arene sodium salt (SCX) has been extensively researched as a coupling agent for organic compounds and metal complexes. SCX features both hydrophobic (aromatic ring) and hydrophilic (SO3-) regions, akin to surfactants and micelles. This work reported a method for the fabrication of graphene oxide macroscopic thin films using a three-dimensional (3D) surfactant, 4-sulfonic calix[4]arene, as a lateral aggregation agent.
Preparation process of macroscopic ultrathin conductive films
Oxidized graphene (oGr) flakes are first synthesized via electrochemical exfoliation, followed by washing and dispersion in water with the innovative three-dimensional (3D) surfactant SCX. The assembly of the oGr flakes involves a three-step procedure:
· First, the oGr/SCX mixture is deposited onto a filter membrane through vacuum filtration of the suspension.
· Next, the oGr/SCX cake on the filter membrane is immersed in water, leading to the removal of an ultra-thin layer from the top of the cake while leaving a thicker layer behind on the filter.
· Finally, the floating oGr/SCX film is retrieved from the water surface and placed onto the desired substrate.
· This process can be repeated to produce several thin films from the same oGr/SCX cake. Once transferred to a substrate, the oGr film undergoes reduction by immersion in a hydrazine solution to lower its sheet resistivity.

Gold-Polypyrrole Sensor Doped with 4-Sulfocalix[4]Arene Nanocomposite

Tanwar, Shivani, et al. Green chemistry, 2012, 14(3), 799-808.

A facile green gold nanocomposite synthesis method was successfully developed using polypyrrole (PPY), HAuCl4, and 4-sulfocalix[4]arene as reducing agent, oxidizing agent, and dopant, respectively. The obtained nanobeads were composed of gold (21.35%) and polypyrrole doped with 4-sulfocalix[4]arene, with a uniform size in the range of 30 to 50 nm. The resulting Au-Calix-PPY nanocomposite exhibited significant electrochemical activity and was successfully used to sense formaldehyde and glucose, respectively.
A universal solvent (water) is chosen for synthesis, and when the above three ingredients are added in rapid sequence, a nanocomposite can be formed. Because it involves a template-free synthesis procedure, the nanocomposite product does not contain by-products that are often produced when using traditional initiators such as APS. During the reaction, the solution containing Au, PPY, and 4-sulfocalix[4]arene was observed to darken within 2 min after the start of the reaction without any external initiating source.
During the synthesis of the nanocomposites, 4-sulfocalix[4]arene acted as a polydopant, and its presence was confirmed by IR, EDX, and XPS analyses. It is worth emphasizing here that no external stabilizer is required as the doped PPY provides excellent stability to the AuNPs.