(1) More than 90 complexes with nonlinear optical activity were synthesized, and the crystal structures of more than 80 complexes were determined. Their electrochemical properties, magnetic properties, spectral properties, molecular design and molecular calculation of nonlinear optical materials are deeply studied. (2) A series of organic and semi-organic compounds with D-p-A, D-p-D and L configurations were synthesized by molecular design, and the relationship between their spectral properties and structures was explored, and more than ten kinds of laser upconversion materials with strong two-photon absorption were obtained. (3) The nonlinear optical properties and addition reaction mechanism of thiazine Schiff base complexes were studied. (4) The synthesis, structure, microscopic mechanism of SHG effect and crystallization habit of blue-violet frequency-doubling complexes were systematically studied. Some research results have been published in international academic journals such as Inorg. Chemistry. , J. Ogamat. Chemistry. And J. mater Chemistry.
2. Spectral and spectroelectrochemical studies of functional complexes.
(1) Based on the high selectivity and sensitivity of ligands to metal ions, an innovative method and theory for trace analysis of complexes with primary and secondary wavelengths and B-corrected spectra were established. This method can effectively eliminate the influence of ligand color on the determination, and can easily calculate the absorbance of complex in dark mixed solution. The application of photometric analysis of various complexes was completed. (2) On the basis of studying the electrochemical properties of the complexes, a variety of macrocyclic complexes modified electrodes were prepared, and the polarographic analysis method of the complexes was established. Inorganic nano-materials were modified on the electrode surface, and the direct electrochemical behavior of biomacromolecules on the modified electrode and the interaction mechanism between complexes and biomacromolecules were studied. The intermolecular electron transfer mechanism and intramolecular electron delocalization process of photoelectric functional complexes were studied by in-situ spectroelectrochemistry (infrared, ultraviolet, fluorescence, Raman, etc.). ), which laid a foundation for the design and synthesis of molecular wires, molecular switches and other components.
Some research results have been published in Supra and other international academic journals. Chemistry. , J. Chem, Australia. , cattle. Chemistry. Socialist Japan. In this direction, it undertakes 3 national natural science funds, the national "973" sub-project 1, the young and middle-aged backbone teachers fund of the Ministry of Education 1, and participates in the national climbing plan 1. More than 20 published research papers 1 were included by SCI and EI, and the research results won 3 provincial awards, 2 provincial government youth science and technology awards and national invention patents1.
The characteristics, academic position, function and significance of this research direction;
This direction studies the preparation, structural characterization, modification and design of inorganic/organic sensitive materials, as well as sensing and detection technologies and applications, and has formed its own characteristics in the field of sensing technology. The research direction includes the following aspects:
1, Design, Synthesis and Characterization of Inorganic Sensitive Materials
Thin films and composite films of tin dioxide, lanthanum ferrite, iron oxide, tin dioxide/iron oxide and tin dioxide/silicon oxide were prepared by sol-gel method. The microstructure and photosensitive mechanism were systematically studied. In the aspect of thick film inorganic sensitive materials, the preparation, process, microstructure and mechanism of new thick film force sensitive functional materials, as well as the design and integration of thick film force sensitive sensors are mainly studied. In addition, the preparation, mechanism and properties of new thick film force sensitive materials based on nanotechnology are also discussed, so as to realize the research of special sensors in extremely harsh environment (ocean exploration, etc.). ).
According to the new dynamic gas detection method, gas sensors assembled with inorganic sensitive materials have been used to dynamically detect gases such as carbon monoxide, H2 and ethanol. The experimental results show that there is a gas characteristic peak in the dynamic test spectrum, and the gas concentration is proportional to the area of the characteristic peak. The mathematical model of gas reaction on sensitive materials is established, which solves the selectivity problem of semiconductor gas sensitive materials.
2. Design, synthesis and characterization of inorganic/organic sensitive materials.
Nano-hollow microspheres with environmental sensitivity were synthesized by simulating the sensing, processing and executive functions of biological cells. Using monodisperse silica nanoparticles as templates, the temperature-sensitive or pH-sensitive polymer was coated on the surface of silica particles by soap-free emulsion polymerization, and the silica was removed by HF, thus forming nano-hollow microspheres sensitive to environmental temperature or pH value. The void size of microspheres can be controlled by the particle size of silica. The relationship between the molecular structure of polymer and the sensitivity of microspheres was discussed. Because the size and permeability of microspheres can be controlled by ambient temperature or pH value, they have potential application prospects in microreactors, enzyme immobilization, gene transfection and targeted drug delivery. Using bionic principle to prepare intelligent microspheres sensitive to other environmental factors (such as chemicals and biological substances) is the main research work in this direction in the future.
3. Preparation and characterization of inorganic special functional film materials.
A series of (Ag, Cu, Al)-MgF2 composite cermet films with given stoichiometry and a new type of rare earth-manganese-bismuth (RE-MnBi) alloy permanent magnet film with high magnetic energy product were prepared by physical and chemical methods, which solved the problem of controlling the composition, particle size, structure and distribution of the films in the film-forming technology both experimentally and theoretically. The problem of oxidation during film formation was solved by electronegativity theory. The composition, microstructure, chemical state and the relationship between spectrum and microstructure of thin films were studied by modern analytical techniques. The application prospect of thin films as low temperature coefficient metal ceramic film resistance materials, permanent magnets, thin film materials for solar energy conversion devices and selective light absorption materials is discussed.
This direction has undertaken 2 national key scientific and technological projects, 3 national natural science foundation projects, 3 academy, provincial and ministerial scientific research projects, published more than academic papers 100, and won the third prize for scientific and technological invention of China Academy of Sciences 1, the third prize for scientific and technological progress of China Academy of Sciences 1, 2 silver prizes for inventions in Anhui Province and the second prize for excellent papers in natural science in Anhui Province.