Design And Application Of Multifunctional Photoresponsivity Photochromic Coordination Polymers

Multifunctional light-responsive materials have broad application potential in the fields of smart windows,sensors,information storage,and chemical switches.Combining photochromic materials with luminescence can not only provide new means for regulating luminescence,but also may obtain some interesting applications such as detection and information storage.Organic photochromic materials have the characteristics of light weight,flexibility,and versatility,while inorganic photochromic materials have the characteristics of high heat resistance and mechanical resistance.Coordination polymers(CPs)not only retain the respective properties of the inorganic and organic parts,but also obtain new properties through the synergistic effect between the inorganic and organic parts,and are therefore considered to be a class of promising multifunctional light-responsive materials.In this thesis,the design and application of multifunctional light-responsive photochromic coordination polymers have been carried out,and the following results have been obtained:1.A case of photochromic open framework compound formed by cation-?interaction was synthesized.The compound has good photochromic,photoluminescence and light-emitting switch performance that changes with irradiation time.Through a series of detection experiments,it is found that the detection concentration of this compound for aniline has reached an unprecedented level(10^-8M),and it is an effective fluorescent detection material.This work provides new inspiration for new open-frame photochromic compounds formed through cation-?interactions as multifunctional response materials.2.Two isostructural 2D coordination polymers with photochromic properties were prepared.With the increase of the excitation wavelength,the emission of the two compounds in the solid state gradually changes from the ultraviolet light band to the visible light band,showing the photoluminescence properties that are dependent on the excitation wavelength.In addition,the two compounds exhibit photoluminescence switching characteristics that vary with the irradiation time,and have a shorter saturation time and higher luminescence switching contrast than most known transition metal fluorescent switching compounds.This work provides broad prospects for the development of multifunctional light-regulated fluorescent switches.3.A series of new metal halide colorimetric luminescent materials have been synthesized.Under the irradiation of xenon lamp,the compounds exhibit the characteristics of photochromic and light-regulated luminescent switch in air.