Synthesis Of Aggregation-Induced-Emission Molecules Base On Au(Ⅰ) Compounds With Isocyanobenzene Bridge

The traditional fluorescent sensors have a common feature:they would be quenched when they aggregated.This feature limits their application as chemical and biological sensors.Aggregation-Induced Emission(AIE) compounds would not be quenched when they aggregated, oppositely, they would emit stronger light.This character makes them desirable candidates for chemical and biological sensors.We designed and synthesized a series of isocyano-based gold (I) complexes, and confirmed their structures, and investigated the effect of ligand structures towards unique properties. The main contents are shown as following:1. We designed and synthesized four single gold compounds bridged by iso cyanobenzene which was substituted by alkyloxy chain containing aromatics of benzene、 naphthalene、philippines and pyrene. The optical behavior of its different proportions DMF-H2O Mixed solution researched by Ultraviolet absorption spectrum and Fluorescence emission spectra show that compounds I-a and I-d exhibit AIE properties.2. We designed and synthesized two double gold compounds Ⅱ-a and Ⅱ-b bridged by double isocyanobenzene containing sulfur atom. The optical behavior of its different proportions ACN-H2O mixed solution researched by Ultraviolet absorption spectrum and Fluorescence emission spectra show that two compounds exhibit good properties of AIE. Furthermore, with the addition of water in the mixed solution, its emitting color turns chartreuse from blue. The compound of Ⅱ-a containing thia crown ether group exhibits the selective "turn-off" recognition of heavy metal ions in the aggregation state with the ratio of ACN-H2O is1:1.3. We design and synthesis two double golden compounds Ⅲ-a and Ⅲ-b, which contain open chain crown ether with different length and research their AIE properties in six water-soluble solvent such as tetrahydrofuran, acetonitrile, acetone, DMF, DMSO and methanol. The results show that Ⅲ-a and Ⅲ-b exhibit obvious AIE properties in different mixed solvents and different solvents have some effects on their AIE properties. Furthermore, we also determine their response to metal cations and find that both Ⅲ-a and Ⅲ-b have no response to metal cations.