Study On The Synthesis Of Perylene Dye Sensitizer Inside Co-SiO₂Molecular Sieve And Its Optical Properties

As everyone knows, now the sources of energry in short supply, how to usingthe solar energy decomposes water for getting hydrogen and photocatalysis getattention of scholars. Ion doping and dye sensitization is an effective way to improvethe photocatalytic. Perylene compound is a good dye sensitizer, which can obtainhigh-efficiency fluorescence in the state of single-molecule and can stronglyquenched due to the strong π-π aggregation in even dense solution and solid state.Mesoporous molecular sieves are one of the most promising hosts due to their lagersurface areas and porous volumes. The self-advantage of molecular sieve make itpossible for the heteroatom into the hole wall to replace the silicon atoms in thetetrahedral position. Diimede/molecular sieve composite material were prepared bymesoporous molecular sieves as the carrier, which would have potential application inhydrogen manufacturing. In recent years, scholars of polythiophene is a sensitizingagent that is keen to be study, preparing polythiophene derivatives to meeting dyesensitizer conditions can also effectively improve the photocatalytic efficiency.In this paper, N,N’-di(4-pyridine)-1,7-di(4-t-octylphenoxy)-3,4,9,10-perylenediimide molecules(POPPDA)were synthetized by introducing4-azylpyridine and–octylphenol into1,7-dibromo perylene glycosides, which have high melting pointand high fluorescence efficiency. The POPPDA we prepared has good absorption inthe visible region, and it has strong fluorescence at579nm so it can be used as aphotosensitizing agent with it’s basic conditions. The concentration-dependent UV-visof the POPPDA in CH2Cl2at room temperature were studied．The relative intensitiesof0-1and0-0transition within the electronic transition procession were carried out todistinguish monomer and aggregative state of POPPDA．The Co-MCM-41and Co-SBA-15were prepared by isomorphous substitutionmethod. Organic-inorganic composite materials were obtained by incorporatingPOPPDA into Co-MCM-41and Co-SBA-15. The structures were characterized byNMR and IR, and Optical performances were distinguished by UV-vis absorption andfluorescence spectroscopy. The concentration-dependent UV-vis of Opticalperformances at room temperature were studied．The relative intensities of0-1and0-0transition within the electronic transition procession were carried out todistinguish monomer and aggregative state of POPPDA．The composite materials also have a good absorption. These two composite materials has a very good applicationprospects at making water into hydrogen by using solar photolysis.Poly N-(4-pyridyl)-3-thiophene methylamine was prepared, which is of goodoptical performance.3-thiophene chloride was got by the raw material3-thiophenylacid, then Monomer N-(4-pyridyl)-3-thiophene methylamine was obtained by mix of3-thiophene chloride and4-azylpyridine, the Poly N-(4-pyridyl)-3-thiophenemethylamine was obtained by polymerization. The structures were characterized byNMR, UV-vis absorption and fluorescence spectroscopy, which suggested thepolymer is Π-conjugated molecular with well optical performance and would havepromising applicaction in field of optoelectronic materials and biological probes. Inthe same polythiophene derivatives have a very good value of using the solar energydecomposes water for getting hydrogen.