Design And Synthesis Of Hydrazone And Triazole Compounds And Ions The Recognition Properties

A series of novel colorimetric ion sensors which bearing phenol O-H, hydrazone N-H groups, acyl- hydrazone N-H groups and triazole groups were designed and synthesized via simple processes. The binding properties of the receptors with anions and cations were examined by 1^H NMR and UV^-Vis spectroscopy methods. The major contents are as follows: 1. The anions sensors (1-6) bearing phenol O-H and acyl-hydrazone N-H groups could colorimetricly sense F^-, CH₃COO^- and H₂PO₄^-. In DMSO/H2O 7:3 (v/v) solutions, the receptor 2 showed colorimetric single selectivity for CH3COO^-. When CH3COO^- was added to their solutions, dramatic color changes from pink to deep red were observed. Yet other anions such as F^-,Cl^-,Br^-,I^-,H₂PO₄^-,HSO₄^-,ClO₄^- could not cause any distinct color change. 1^H NMR titrations studies showed that there are hydrogen bonding interaction between the receptors and anions. 2. The anions sensors C₁-C₃ bearing phenol O-H and hydrazone N-H groups could colorimetricly sense F^-, CH₃COO^- and H2PO4^- also. When adding F^-, CH3COO^- and H2PO4^- to their solutions for respectively, the color has shown striking changes from yellow to blue. In DMSO/H2O 7:3 (v/v) solutions, the receptor C₂ showed colorimetric single selectivity for CH3COO^-. When CH₃COO^- was added to their solutions, dramatic color changes from yellow to red were observed. A test paper based on C2 was developed which could detect AcO^- conveniently. While 1^H NMR titrations confirmed deprotonation of the OH and hydrogen bonding interactions between CH and anions. 3. A series of triazole based receptors were synthesized. We have been studied the binding properties with cations such as Zn2+, Pb2+, Cd2+, Ni2+, Co2+, Fe3+, Hg²⁺, Ag+, Ca2+ and Cu2+ in DMSO. The receptor 5a could recognize Hg²⁺, Fe3+ and Cu2+. Especially, the results of recognition A series of novel colorimetric ion sensors which bearing phenol O^-H, hydrazone N^-H groups, acyl^- hydrazone N^-H groups and triazole groups were designed and synthesized via simple processes. The binding properties of the receptors with anions and cations were examined by 1^H NMR and UV^-Vis spectroscopy methods. The major contents are as follows: 1. The anions sensors (1^-6) bearing phenol O^-H and acyl^-hydrazone N^-H groups could colorimetricly sense F^<sup>-, CH3COO^- and H2PO4^-. In DMSO/H2O 7:3 (v/v) solutions, the receptor 2 showed colorimetric single selectivity for CH3COO^-. When CH3COO^- was added to their solutions, dramatic color changes from pink to deep red were observed. Yet other anions such as F^<sup>-,Cl^<sup>-,Br^<sup>-,I^-,H2PO4^-,HSO4^-,ClO4^- could not cause any distinct color change. 1^H NMR titrations studies showed that there are hydrogen bonding interaction between the receptors and anions. 2. The anions sensors C1^-C3 bearing phenol O^-H and hydrazone N^-H groups could colorimetricly sense F^-, CH₃COO^- and H₂PO₄^- also. When adding F^<sup>-, CH3COO^- and H2PO4^- to their solutions for respectively, the color has shown striking changes from yellow to blue. In DMSO/H2O 7:3 (v/v) solutions, the receptor C2 showed colorimetric single selectivity for CH3COO^-. When CH3COO^- was added to their solutions, dramatic color changes from yellow to red were observed. A test paper based on C2 was developed which could detect AcO^- conveniently. While 1^H NMR titrations confirmed deprotonation of the OH and hydrogen bonding interactions between CH and anions. 3. A series of triazole based receptors were synthesized. We have been studied the binding properties with cations such as Zn2+, Pb2+, Cd2+, Ni2+, Co²⁺, Fe³⁺, Hg²⁺, Ag⁺, Ca²⁺ and Cu²⁺ in DMSO. The receptor 5a could recognize Hg²⁺, Fe³⁺ and Cu²⁺. Especially, the results of recognition Hg²⁺ have some potential applicable prospect. have some potential applicable prospect.