Synthesis And Properties Studies Of Small Molecules Based On Naphthaldehyde Schiff

Some Schiff bases molecules have strong coordination ability with metal ions, metal ions can be applied in the organic compounds to increase the ability of application. For example, the introduction of metals into the material can increase the ductility of the molecule. In the analysis, we can use the fluorescence method to integrate the metal spectrum and the detection of metal ions. Therefore, the research of the Schiff base is a hot spot of the research workers. Naphthaldehyde can form intramolecular hydrogen bond, which can cause the change of the spectrum through the PET effect, and the structure of naphthaldehyde molecule is a planar structure, which is helpful for its self assembly and luminescence.Compound (S)-2-(2-hydroxynaphthalen-1-yl) methylene) amino)-N1 and N5 diocta-decylpentanedia-mide (compound 1) in dimethyl sulfoxide (DMSO) can form CuG and ZnG with Cu2+ and Zn2+, and have a negative ion effect and its conformity with the law of Hofmeister.Probe (S)-2-(2-hydroxynaphthalen-1-yl) methylene) amino)-N1, N5-dibutyl pentanediamide (probe 2) in ethanol-Tris (pH= 7.4) buffer solution has high selectivity with Zn2+, after combined with Zn+ fluorescent emission signals of probe 2 have great changes and UV absorption peak shift obviously, probe 2 added into Zn2 + and the fluorescence emission peak intensity was about increased 6.8 times, the detection limit is 5.5 x 10-8 mol/L. Probe 2 in ethanol-Tris (pH= 6) buffer solution have high selectivity with Al3+, after combined with Al33 fluorescence emission signals have of probe 2 great changes and UV absorption peak shift obviously, probe 2 added into Al3+and the fluorescence emission peak intensity was about increased by 4.2 times and the detection limit is 1.27 x 10-/mol/L.Probe(E)-N-butyl-2-(((2-hydroxynaphthalen-1-yl)methylene)amino)acetamide (Probe Gly-1) in ethanol:water=1:99 system has high selectivity towards Al3+ and probe GLy-1 after combined with Al3+fluorescence emission signal has great changes and UV absorption peak there is obvious displacement, The probe GLy-1 added into Al3+ and the fluorescence emission peak intensity about enhanced 11.7 times, the detection limit is 2.95 x 10-8 mol/L.