Fluorescent salicylaldehyde hydrazone as selective chemosensor for Zn2+ in aqueous ethanol: a ratiometric approach.
4-N,N-diethylaminosalicylaldehyde hydrazone Schiff base (1) and its analogues (2-6) were synthesized and characterized by NMR, MS and elemental analysis. Compound 1 exhibited ratiometric fluorescent response to Zn(2+) over other metal ions in aqueous ethanol solution with neutral buffer. The complexation ratio, site and constant and the effect of pH value and water fraction on its fluorescent response to Zn(2+) were investigated.
Li
Na
N
Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China.
Tang
Weixin
W
Xiang
Yu
Y
Tong
Aijun
A
Jin
Peiyuan
P
Ju
Yong
Y
D000447:Aldehydes; D002623:Chemistry Techniques, Analytical; D000431:Ethanol; D005470:Fluorometry / Q000379:methods*; D006835:Hydrazones; D006863:Hydrogen-Ion Concentration; D011874:Radiometry; D012545:Schiff Bases; D014867:Water; D015032:Zinc / Q000032:analysis*
D000447:Aldehydes; D006835:Hydrazones; D012545:Schiff Bases; D014867:Water; C013243:salicylaldehyde; D000431:Ethanol; D015032:Zinc