Ammonium perfluorononanoate

Ammonium perfluorononanoate (APFN) is an anionic surfactant that in water forms liquid crystalline phases (Lyotropic liquid crystal). It is the ammonium salt of perfluorononanoic acid.

Ammonium perfluorononanoate
Names
IUPAC name
Heptadecafluorononanoic acid ammoniate (1:1)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.242.185
PubChem CID
  • InChI=1S/C9HF17O2.H3N/c10-2(11,1(27)28)3(12,13)4(14,15)5(16,17)6(18,19)7(20,21)8(22,23)9(24,25)26;/h(H,27,28);1H3
    Key: ORBBVPFDROYXQS-UHFFFAOYSA-N
  • InChI=1/C9HF17O2.H3N/c10-2(11,1(27)28)3(12,13)4(14,15)5(16,17)6(18,19)7(20,21)8(22,23)9(24,25)26;/h(H,27,28);1H3
    Key: ORBBVPFDROYXQS-UHFFFAOYAU
SMILES
  • FC(F)(C(F)(F)C(=O)O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F.N
Properties
C9H4F17NO2
Molar mass 481.106
Density 1.753 g/mL
Boiling point 196 °C (385 °F; 469 K)
Surface tension:
~8.0 mmol/L
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

The phase diagram of APFN/H2O system is delineated by the presence of a lamellar phase and a nematic phase with awide isotropic solution. The nematic phase is of the type I, and the aggregates have a positive and diamagnetic anisotropy. In the presence of a magnetic field, the aggregates align parallel to the field direction. The change of phase at the lamellar-nematic temperature has been ascribed to order-disorder transitions.

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