| The main work of this dissertation is to design and synthesize a series of mononuclear spin cross-over complexes,and to explore intermolecular forces,coordination roles,and up-conversion luminescence from two aspects of modification of reactive functional groups and upconversion of nanomaterials to control the performance of Fe-H2Bpz2 system.This is of great significance for synthesizing and extending the new form of practical application of spin-cross materials under the control of spin-cross material.The main content of the paper is as follows:?1?Three novel Fe-H2Bpz2 spin-crossing compounds were designed and synthesized.Their structures were characterized by means of elemental analysis and NMR.In addition,the long-chain alkane amine crystal matrix was used to improve the alcohol solubility of 4,4'-dicarboxy-2,2'-bipyridyl?bipy-COOH?,and the complex[Fe?H2Bpz2?2?bipy-COOH?]was successfully synthesized.?2?The effects of different reactive functional groups on the spin-crossing properties of the above three complexes were studied.In addition,a complex cation(Fe?bipy-NH2?32+)was prepared and synthesized,its crystal structure was characterized,and its CO2 adsorption performance was explored.?3?The influence of near-infrared excitation on the properties of the spin-on-upconverted nanocomposites was explored.Through the ligand exchange reaction,NaYF4:Er Yb nanoparticles and spin-crossing complexes were assembled into three different forms of core-shell spin-on-upconverted nanocomposites UCNPs@[Fe?H2Bpz2?2?bipy-COOH?]?1?,UCNPs@[Fe?H2Bpz2?2?bipy-NH2?]?2?and UCNPs@[Fe?4-NH2-bazt?3?BF4?2]n?3?,nanocomposites are characterized by TEM.The morphology and dimensions of the nanocomposites were investigated by UV,fluorescence,and dielectric properties,and the effects of using 980 nm near infrared on the properties of the nanocomposites were investigated. |
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