Gold(?)Compounds Based On Isocyano Or Pyridine:Synthesis And Mechanochromism Properties

In the 1980s,"smart" materials declared the birth of the fourth generation of materials after natural materials,synthetic polymer materials and artificial design materials,which will lead to an epoch-making revolution in the development of material sciences in the 21st century.As a class of“smart,materials,mechanochromic fluorescent materials have gained substantial attention due to their potential applications in optical recording,data security,trademark anti-counterfeiting,fluorescence switches,data storage,memory chips,mechano-sensors.The discovery of aggregation-induced emission(AIE)materials,first reported by Tang et al.in 2001,have opened up an new path for the exploitation of new mechanochromic fluorescent materials.Based on this studies,we designed and synthesized a series of metal complexes with mechanofluorochromic or/and aggregation-induced emission(AIE),and investigated their optical properties with the molecular structure.The main contents are shown as following:(1)Five isocyanobenzene binuclear gold(?)complexes with different bridges were designed and synthesized,and have been structurally characterized by NMR,IR as well as elemental analysis.The complexes ?-1,?-2 were examined by X-ray crystal diffraction.We studied the optical properties of these complexes by Uv-Vis spectrum,fluorescence emission spectrum and X-ray powder diffraction.These studies revealed that the six complexes shows the aggregation-induced emission(AIE),and the complexes ?-4,?-5 were reversinble mechanofluorochromic behavior,The experimentalresults indicated that the structure of the organic ligands has a large effect on optical properties.(2)Five different gold(?)complexes with different Pyridine ligands were designed and synthesized,and have been structurally characterized by NMR,IR as well as elemental analysis.The complexes ?-1,? 2,?-3 were examined by X-ray crystal diffraction.We studied the optical properties of these complexes through the Uv-vis spectrum,the fluorescence emission spectrum and X-ray powder diffraction.These studies revealed that the complexes ?-1,?-3,?-5 have the reversible mechanofluorochromic behavior or reversible mechanochromic switch behavior,but the complexes ?-2,?-4 present mechanochromically inactive properties.The experimental results indicated that the structure of the organic ligands has a large effect on optical properties.