INHIBIT Logic Gate And Recognition Of H₂PO₄～- And Cu～(2+)

(1) 1,3-diphenyl-4-phenylacetyl-5-pyrazolone(HDPP-PA) and its complexes of Al³⁺, Fe³⁺ were prepared. Their compositions and structures were characterized by elemental analysis, ¹H-NMR, MALDI-TOF-MASS, IR spectra, UV-Vis spectra, fluorescence spectra. The fluorescence of Al(DPP-PA)₃ was quenched by the addition of Fe³⁺,and the INHIBIT logic gate was fabricated.(2) 1-phenyl-3-methyl-4-isobutyryl-5-pyrazolone (HPMIP) and its complexes of Tb³⁺, Fe³⁺ were synthesized. Their complexes and structure were characterized by elemental analysis, X-ray single crystal structure analysis, UV-vis, fluorescence spectra and fluorescence lifetime. HPMIP is an example of a molecular logic gate corresponding to a tow-input INHIBIT function, where the 'output', a sharp, line-like, terbium emission, is only observed with two chemical input ( i )the presence of Tb³⁺ (ii) the absence of Fe³⁺.(3) 2,3-Bis(N-α-naphthylureido)maleonitrile(BNUM) was synthesized. It was characterized by IR spectra, elemental analysis and ¹H-NMR. Chemosensor(BNUM) shows a selective fluorescence quenching effect with H₂PO₄^- over other anions via a PET mechanism.(4)The syntheses of 1,8-Bis(N-phenylureido)naphthalene with 2-,4- various substituents were described. The selectivity for Cu(â…¡) ion is improved by using BPUN-2-OCH₃ as a chemosensor.