新型β-二酮類有機硼配合物的設(shè)計、合成及力致變色性能研究
[Abstract]:The force induced fluorescent material is a new kind of intelligent material for the response to the response of force stimulation. The fluorescence wavelength and fluorescence intensity can be reversible. In recent years, more and more attention has been paid for its potential applications in many fields, such as information storage, trademark anti counterfeiting and micro stress sensing. The unique photochemical and photophysical properties have become an important class of molecular systems in the field of stimulating response functional materials. The four styrene (TPE) molecules in the aggregation induced luminescence (AIE) molecules have the advantages of distorted conjugated structure characteristics and high efficiency of solid-state luminescence. This paper introduces TPE into the complex of two boron fluoride - two - ketones. A series of TPE derivatives were synthesized by chemical modification of the molecular skeleton, and a series of TPE derivatives were synthesized. The main contents of this paper are as follows: the main contents of this paper are as follows: the first chapter focuses on the light physical process of the excited states, the aggregation induced luminescence properties, four styrene class. The application of aggregated induced luminescent materials, the application of organo boron complexes and the development of organic light-emitting materials were introduced. The second chapter, based on halogen effect, synthesized a series of two boron fluoride beta two ketones containing TPE groups, mainly studied their photophysical properties, AIE properties, and the properties of force Chromism. It is shown that the target molecules have good AIE properties, and the mechanism of discoloration is derived from the reversible transition from crystalline to amorphous. In addition, the cause of the red shift induced by this kind of molecular force is that the conjugated range of the molecule is increased by the conformation of molecular conformation under pressure, which leads to the widening of the solid absorption spectrum. In addition, we also found that TPEDKBF2Br has self recovery properties of fluorescence, which may be due to the strong crystalline properties of the molecule. In the third chapter, we investigated the effect of alkyl chains on the fluorescence properties of mother molecules, and studied their AIE properties and force photochromic properties in detail. The study found that five compounds were found. All of them have good AIE properties; compounds TPEDKBF2OMe, TPEDKBF2OBu, and TPEDKBF2OHe have tension (isotropic force) induced emission wavelength blue shift and fluorescence enhancement. The reason is that tension destroys the original tightly packed crystals, making the phase separation interaction in the crystal release, forming a relatively loose arrangement. In addition, the five compounds exhibit the characteristics of the red shift of the emission wavelengths under the force of anisotropic force. In addition, through the study of the thermodynamic properties, the temperature required for the recovery of the target molecules after the grinding of the target molecules gradually decreases with the increase of the alkyl chain, so the modification of the alkyl chain can be passed to regulate the response of the AIE molecules to the temperature. Finally, we find that a long alkyl chain can make a large number of large cavities formed when the molecules are arranged in a single crystal, so that the cultured crystals are easier to be amorphous under external force. In the fourth chapter, three compounds with the terminal of the mother molecule of two methylamino, two benzylamino and carbazole groups are synthesized. The effect of rigid nitrogen group and flexible nitrogen group on the luminescence and luminescence of the target molecules is studied. The results show that the compound TPEDKBF2Ca has good AIE properties, and also shows the color change performance of the red shift of the force luminescence, but the luminescence efficiency of the.TPEDKBF2DMeA molecule in the solution is good. It has reached 45.5% in toluene, but it has a low luminescence efficiency of only 18.8% in the crystal state, showing the properties of aggregation induced fluorescence quenching (ACQ), and its discoloration performance is poor. The mobile.TPEDKBF2DBeA with only 10nm before and after grinding shows the two element luminescence (DSE) properties of both solution and solid state. The phenomenon of blue shift induced by lapping is found. It is concluded that the molecular arrangement of the compound in the crystal phase is highly conjugated, and the molecular conformation in the amorphous state after grinding is distorted and the overall conjugation degree is small, so the lapping leads to the blue shift of the luminescence wavelength. And solvent fumigation means that it changes from amorphous to crystalline, and has no reversible color change.
【學(xué)位授予單位】:石河子大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:O641.4;TB381
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