| Nowadays there have high demands with the functional materials, they should be in low energy consumption, little pollution and high value. Fabricated the Organic-Inorganic hybrid nanocomposite have caused the scientists'interesting, which is an important direction of the development of the molecular chemistry. The inorganic materials such as metal oxide usually to be widely used in electronic devices, separation and catalytic engineering, but these materials structure are difficult to reform and decorate, difficult to control their size, shape , physical and chemical characteristics that to according the actual needs. Organic materials have the excellent molecular tailoring and modify functions, however, there have the obvious shortcomings in the sturdiness and stability. How to combine the performance of inorganic and organic, and to fabricate the stable, good performance of hybrid material used the molecular design and molecular engineering to assemble and hybrid them, have became a new field important research topic in chemical materials.Phthalocyanine and porphine complexes, which have coplanar planes ring structures withπ-systems. They have excellent thermal stability and chemical stability. In recent decades, they are widely used in photoelectric domain, and they are the typical organic semiconductor materials. In addition, they are widely used in biological sensors, photocatalysis, photodynamic therapy and photoelectric conversion aspects. Their circular structure combine with rare earth metal form sandwich type complexes. Because of the difference between central metal ions andπ-systems determined the different applications in material sciences domain. For example, phthalocyanine and porphyrin complexes whit la department central metal ions are the good performance in molecular organic metal conductor. Therefore, selective decorate the structure and introduce different metal ions to induce interactions between theπ-systems become the beterminants to preparate the new materials.Perylene tetracarboxylic acid bisimide, in short perylene bisimide (PDI), have the excellent thermal stability, light stability and chemical stability. They were kinds of dyes applied in industrial dyes domain primary. Then they were found unique light, electric, magnetic properties, to apply in the solar energy conversion, electroluminescent, biological fluorescence probe, etc. By chemically modified to the structure, introduce different substituents control the quality of compound, to seek a new Perylene tetracarboxylic acid bisimide derivative with photoelectric nature. These dyes organizated into supramolecular architectures through hydrogen-bonding, metal ion coordination andπ-πstacking, through effective induction can form nano- materials. However, in the right position introduce appropriate substituents has been bothering people's problems. In this paper, we are dedicated to seeking a new type perylene tetracarboxylic acid bisimide derivative, to explore the relationship between the structure and performance of its properties. Through repeated exploration practice to design the perylene tetracarboxylic acid bisimide derivatives compounds whit special performance.The following is the specific contents of our work:1. Self-assembled nano-Structures of sandwich-type mixed (phthalocyaninato)(porphyrinato) rear earth complexes.Effect of porphyrin-phthalocyanine ligands on tuning the inter-molecular interaction.We described self-assembly properties of three novel sandwich-type mixed (phthalocyaninato)(porphyrinato) rear earth complexes, namely Ce (DPP)(Pc) , Sm2(DPP)(Pc)2 and Sm2(DPP)2(Pc) [Pc = dianion of phthalocyanine, DPP= dianion of 5,15-di(phenyl)porphyrin], Introduction of different number of porphyrin and phthalocyanine ligands in the double- and triple-decker molecules leads to the formation of nanostructures with different morphology, clearly revealing the effect ofπ-πinteraction, van der Waals, and metal-ligand coordination in tuning the inter-molecular interaction between sandwich-type molecules in the self-assembly process. This represents our continuous efforts in understanding relationship between the molecular structure and corresponding nanostructures of sandwich tetrapyrrole rare earth compounds,will provide information helpful on preparing self-assembled nanostructures with controlled molecular packing conformation and morphology through molecular modification.2. Self-assembled organic-inorganic hybrid nanocomposite of a perylenetetracarboxylic diimide derivative and CdS. We synthesized a new perylenetetracarboxylic diimide derivative with two hydroxyethyl:N-n-hexyl-N'-(2-hydroxyethyl)-1,7-di(4'-t-butyl)phenoxy-perylene-3,4:9,10-tetracarboxylic diimide (HO-PDI). Through the chemical bonds connected to quartz or SiO2 / Si substrate, and then deposited the CdS onto the organic template, success to fabricated the organic/inorganic hybrid nanocomposite . Through the AFM images and fluorescence spectrum can compare the difference between the HO-PDI and CdS/HO-PDI. a disk-shaped CdS nanostructure, which is different from the spherically shaped nanoparticles, has been successfully prepared. There exists a strong interaction between the CdS nanostructure and HO-PDI molecules. Charge transfer may take place with HO-PDI as the donor and CdS as the acceptor. This kind of composite film with an organic/inorganic hybrid structure should have potential applications in a photoelectric conversion system. It is believed to be helpful in opening new possibilities for the construction of molecularly based nano-optoelectronics.3. Synthesize a asymmetric perylenetetracarboxylic diimide derivative and study the aggregate properties of the molecules.We designed and synthesized a new asymmetric perylenetetracarboxylic diimide derivative with hydroxyethyl and a hydrophobic chain: N-(n- hexyl)-N'-(2- diethanolamine phenyl) 1,7-di(4'-t-butyl)phenoxy-perylene-3,4:9,10-tetracarboxylic diimide (2HO-PDI). Through a new solvent based phase transfer assembly method to preparate molecular aggregates. Through the UV and IR found that the molecules arranged with face to face tilt means and between the molecules existed a great number hydrogen bonds. Through the SEM observed aggregate morphology, we found the aggregates'morphology was spiral distorted. By molecular design and synthesis to get specific molecular accumulation patterns and nano morphology , to get single channel photoelectron molecular devices have very good guidance function. |
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