Recognition Properties Of Zinc Family Element Based On Hydrazones And Phenazine Derivatives

Chapter 1: This chapter describes the concept of supramolecular chemistrynature and the host-guest supramolecular chemistry interaction, the study identified the significance of the zinc family element, and the latest research progress to identify the zinc family element. The identification process of different fluorescent chromophores, will be divided into six sections:?1? coumarin ring as fluorescent chromophores zinc family element receptor;?2? naphthalene as fluorescent chromophores zinc family element receptor?3? pyreneto as fluorescent chromophores zinc family element receptor?4? rhodamine B or fluorescein as fluorescent chromophores zinc family element receptor?5? benzothiazole or BODIPY as fluorescent chromophores zinc family element receptor;?6? other fluorescent chromophores zinc family element receptor.Chapter 2: A hydrazone derivative as a fluorescent chemosensor for Zn²⁺ in DMSO/H2O?pH=7.2, v/v=4:1? HEPES buffer solutions has been designed and synthesized. Hydrazone derivative is based on bi-hydrazone derivative which contain benzothiazole as control part and hydrazone bond as a recognition site. The receptor shows a large fluorescence enhancement in the present of Zn²⁺. The test strip based on hydrazone derivative was fabricated, which could act as a convenient and efficient Zn²⁺ test kit. The event is useful for fluorescent detection of Zn²⁺ at the micromolar level. The detection limits were 1.0×10-7 M and 1.6419×10-8 M of Zn²⁺ using the visual fluorescent color changes and fluorescence spectra changes respectively.Chapter 3: A phenazine derivative as a fluorescent chemosensor for Hg²⁺ in DMSO/H2O?pH=7.2, v/v=1:4? HEPES buffer solutions has been designed and synthesized. And sensing Hg²⁺ mechanism is based on the coordination of Hg²⁺ to the sensor via the “N” heteroatoms.Sensor Z could detect to Hg²⁺ in the presence of other competitive cations(Fe³⁺, Hg²⁺, Ag⁺,Ca²⁺, Cu²⁺, Co²⁺, Ni²⁺, Cd²⁺, Pb²⁺, Zn²⁺, Cr³⁺, Mg²⁺) by fluorescence spectra with highly efficient and rapid. In the DMSO solution of Z responded with a dramatic color change, from green to colorless.Chapter 4: A highly selective host L based on an Salicylaldehyde hydrazone was designed and synthesized, which could instantly detect heavy metal ion Zn²⁺ in DMSO/H2O?4:1, v/v? in the aqueous without interference by other cations. And sensing Zn²⁺ mechanism is based on the coordination of Zn²⁺ to the sensor via the “O” and “N” heteroatoms. Sensor Lcould detect to Zn²⁺ in the presence of other competitive cations(Fe³⁺, Hg²⁺, Ag⁺, Ca²⁺, Cu²⁺,Co²⁺, Ni²⁺, Cd²⁺, Pb²⁺, Zn²⁺, Cr³⁺, Mg²⁺) by UV-vis spectrum with highly efficient and rapid.In the DMSO solution of L responded with a dramatic color change, from colorless to green.In addition, The sensor L can perform as “Off–On–Off” molecular switch triggered. At the same time, test strips based on L were fabricated, which could act as a convenient and efficient Zn²⁺ test kit to detect Zn²⁺.