Wu, Fang-Ying published the artcileA dual colorimetric and fluorescent sensor for lead ion based on naphthalene hydrazone derivative, Recommanded Product: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (2013), 221-225, database is CAplus and MEDLINE.
A new compound, 2-boronobenzaldehyde-(2′-hydroxyl-4′-sulfonic acid) naphthalene hydrazone (1), was synthesized and its structure was characterized by 1H NMR, mass and element analyses. The presence of Pb2+ led 1 to undergo colorimetric and fluorescent changes, which were detectable with the naked eye. Thus, a dual spectral response for Pb2+ detection was introduced. In KH2PO4-NaOH buffer aqueous solution (pH 6.0), 1 exhibited fluorescence enhancement at 568 nm and hyperchromicity at 595 nm upon the addition of Pb2+. The fluorescent intensity change was proportionate to the concentration of Pb2+ with a dynamic working range of 5.0 × 10-7 mol L-1 to 1.0 × 10-4 mol L-1 and a detection limit of 3.7 × 10-8 mol L-1. The fluorometric method was successfully applied for the detection of Pb2+ water of Qianhu Lake and soil in Nanchang university campus. The recoveries were 111-116% for water and 97.6% for soil, resp., determined via the standard addition method.
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 C10H10O2, Recommanded Product: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem