The Synergistic Metallized/Self-Assembly Synthesis Of Enhanced Photodegradation Efficiency Porphyrin Nanocrystals

Production of functional nanomaterials is one of the most attractive fields in nanotechnology. Based on the self-assembly technique at molecular level, controlled fabrication of functional organic molecular had become an important issue in fields of supermolecular chemistry, nanotechnology, material chemistry. Porphyrins are normal and extensively exist in nature, it is a special macrocyclic conjugated compounds consisting a macrocyclic plane skeleton molecules of24centers and26electrons-π bond. The stabled and highly conjugated system, which as an ideal building block, possesses excellent fluorescence, chemical activity and thermostability. Metalporphyrin synthesized by the coordination of metal ion with porphin and its derivatives, have superior photoelectric effect. But the synthesis were tedious and organic solvents which are poison was necessary. In this case, we develop a simple, effective, economical and common synchronous method to achieve porphyrin self-assembly and metallization. Based on the previous works, we achieve the synchronous synthesis of porphyrin self-assembly and metallization.(1) Comparing to the porphyrin without metal atom, the metalporphyrin possess preferable electronic buffer, photoelectric magnetic, photocatalytic activity, photoelectric converting, photosensitivity, highly chemical stability and more wider spectral response, made them got more attention in optical, electrical, magnetic field. So we select the5,10,15,20-tetra (4-pyridyl) porphyrin as the building block, which has excellent chemical, optical and thermal stability. We use zinc nitrate as the metal resource and develop an economic and efficient synchronizing method to realize the porphyrin self-assembly synchronized with metallization. We use the acid-base neutralization/micelle confined self-assembly method to explore the coordinate condition of Zn atom metallizated with N atom in the pyrrole of porphyrin through the adjustion of the species of surfactants, base resource and pH of resolution, at the same time, we obtain some self-assemblies with diffierent morphologies,then these self-assemblies were applied to the photocatalytic, the result indicate a superior photocatalytic efficiency in the metaled porphyrin nanowires which have long-range order π-π stacking structures.(2) Based on the acid-base neutralization/micelle confined self-assembly method, we studied the amphipathic porphyrin:haematoporphyrin and hemoglobin, respectively, as surfactants promoting the self-assembly, and5,10,15,20-tetra (4-pyridyl) porphyrin and Zinc5,10,15,20-tetra (4-pyridyl) porphyrin as the building blocks. We explore the influence of various experimental conditions on self-assemblies morphologies and the co-assembly. Meanwhile we study the self-assembly meanwhile, which provide the base for the porphyrin apply in the biologic field.