Fluorene-Based Synthons Incorporating Carbazole Or Thiophene Units: Grids,Polygrids And Their Photoelectric Properties

Macrocycles have attracted a large interest over the past years in supramolecular chemistry and materials science because of their unique structures and novel properties.Due to the large area of ?-conjugate system and shape-persistent structures of the diaryl fluorines,which has a wide range of applications in the field of optoelectronic materials.Base on our group previous work of the study of the Friedel-Crafts reaction.In this thesis,we have designed and synthesized a series of nano-size macrocycles,and we have found the high yield way of cyclization.In the first program,we have produced the synthesizer coupling the diary fluorines and thiophene,and a very low monomer concentration in DCM has been used for the reaction,the precursor completes the cyclization,and we got a series of nanogrid.These are classes of organic photoconductor hole material.These nanogrid display good stabilities of thermal behavior,they can realize solution-processable.Therefore,we investigate the performance of memory devices based on these windmill-like grids as chargeable electret layer.But the system is often complicated with undesired side products.In the second program,we find the efficient formation of the cycle dimer,along with the absence of other noncyclic oligomeric and polymeric byproducts.During this time,we explain the observed high efficiency in the one-step formation of cycle dimer,and explore how the the dimer isomer influence the NMR and the photoelectric performance,and we can achieve the reaction results by changing the reaction conditions.In the third program,we have two way to get the grid polymer.Firstly,we produced the porous polymers vis Yamamoto reaction,but the degree of polymerization is low due to the steric hindrance between the grids.On the other hand,it is more and more emergent to develop low-cost,green and eco-friendly polymerization methodologies.Base on the high efficiency formation of cycle dimer,we have designed novel structure of synthesizer which completed the cyclization on the basis of the polymer chain growth vis the Friedel-Crafts reaction.