4-Aminobenzoic Acid → 4-Aminobenzoic Acid

HRID 333490Notes

Reaction equation

HRID 333490 reaction equation
[CH:1]1[C:6]([C:7]([OH:9])=[O:8])=[CH:5][CH:4]=[C:3]([NH2:10])[CH:2]=1.[P:11](=[O:15])([OH:14])([OH:13])[OH:12]>[F-].Cl>[P:11]([O-:15])([O-:14])([O-:13])=[O:12].[CH:1]1[C:6]([C:7]([OH:9])=[O:8])=[CH:5][CH:4]=[C:3]([NH2:10])[CH:2]=1

Participants

6

Reactant 2

HCID 9784-Aminobenzoic AcidHCID 1004Phosphoric Acid

Product 2

HCID 9784-Aminobenzoic AcidHCID 1061Phosphate

Reagents, catalysts & solvents 2

HCID 313Hydrochloric AcidSolvent2×HCID 28179Fluoride IonSolvent4×

Procedure

FIG. 2 presents the TEM image of a PABA dispersion prepared in 0.1 M phosphoric acid and fluoride. The PABA dispersion was purified and re-dispersed in the 0.1 M phosphoric acid without fluoride. The morphology of PABA prepared in 0.1 M phosphoric acid and fluoride is somewhat similar to that obtained in 0.1 M HCl and fluoride. In 0.1 M HCl solution and fluoride, spherical nanoparticles with diameter in the range of 2-15 nm are obtained.28 However, phosphate doped and complexed PABA produces irregular shape particles with size range 25-50 nm (FIG. 2). The difference observed in the size and shape of PABA prepared in phosphoric acid can be attributed to the boron-phosphate complexation.

Workup

  1. customThe PABA dispersion was purified
  2. additionre-dispersed in the 0.1 M phosphoric acid without fluoride
  3. customThe morphology of PABA prepared in 0.1 M phosphoric acid

Sources & evidence

ORD record
ord-1b11d3ca9bf0422ba6414a2d9fa94daa
Source dataset
uspto-grants-2014_11
Patent number
US08883043B2

Reaction notes

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