Xiao, Min published the artcileSynthesis of 2-borono-benzaldehyde-(2′-hydroxyl-4′-sulfonate) naphthalene hydrazone and recognition of Pb2+, Formula: C10H9NO4S, the publication is Fenxi Kexue Xuebao (2015), 31(6), 792-796, database is CAplus.
2-Borono-benzaldehyde-(2′-hydroxyl-4′-sulfonate) naphthalene hydrazone derivative 2-BBHSNH (the host 1) was designed and synthesized. Due to its good water solubility, the recognition system didn’t need any organic medium. Research results showed that 2-borono-benzaldehyde-(2′-hydroxyl-4′-sulfonate) naphthalene hydrazone possessed highly selective binding and recognition to Pb2+in KH2PO4-NaOH buffer solution (pH=6.0). The host 1 and Pb2+could form a 1:1 complex with strong fluorescence. The maximum emission wavelength of complex 1-Pb2+ was 568 nm and the binding constant was 4.3×104 L·mol-1. The presence of the other metal ions led fluorescence spectra of host 1 little change, such as Cu2+, Mn2+, Mg2+, Fe2+, Ca2+, Co2+, Ni2+, Hg2+, Cd2+, Ag+ and so on. Fluorescence intensity and the concentration of Pb2+ presented good linear relationship from 5.0×10-7-1.0×10-4 mol·L-1 with a correlation coefficient of 0.9983, and the detection limit of method was 9.7×10-8 mol·L-1. The method was used to detect Pb2+in water sample from environment with the recovery of 111%-116%.
Fenxi Kexue Xuebao 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 C4H12ClNO, Formula: C10H9NO4S.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem