Atahan, Alparslan published the artcile1-Amino-2-hydroxy-4-naphthalenesulfonic acid based Schiff bases or naphtho[1,2-d]oxazoles: Selective synthesis and photophysical properties, Formula: C10H9NO4S, the publication is Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (2015), 61-67, database is CAplus and MEDLINE.
A series of Schiff base and naphtho[1,2-d]oxazole derivatives were selectively synthesized via condensation reaction of 1-amino-2-hydroxy-4-naphthalenesulfonic acid and benzaldehyde derivatives at same conditions. The synthesized compounds were then characterized by using 1HNMR, 13CNMR, FTIR spectroscopies and elemental analyses. It was seen that the Schiff bases e. g., I, generated in the presence of OH group at ortho position of benzaldehyde derivatives However, the products were naphtho[1,2-d]oxazoles e. g., II, in other cases. Then, the synthesized compounds were photophys. investigated by UV absorption and fluorescence emission spectroscopies. As a result, these Schiff bases have shown long wavelength absorption (λmax: 386 nm) and emission (λmax: 429-437 nm) effect while synthesized naphtho[1,2-d]oxazole derivatives have a set of absorption (λmax: about 296, 308, 320 nm) and emission maxima (λmax: 378-395 nm) at lower wavelength.
Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Formula: C10H9NO4S.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem