Controllable Fabrication Of Porphyrinoid Coordination Polymer Nanostructures And Their Properties

Porphyrin and its derivatives are highly attractive molecular electronic materials which haveabundant physiochemical and photophysical properties, excellent light harvest, charge storage,photoelectric transformation ability, and they have wide applications in solar cells, photocatalysis,electrochemical sensors, etc. Compare with porphyrin derivatives, metalloporphyrin coordinationpolymers have good thermal stability and rich oxidation-reduction quality, so it have potentialadvantages in charge storage. In view of the current research status of porphyrinoid coordinationpolymers, we synthesized a series of highly uniform and ordered porphyrin coordination polymernanostructures with controllable size and shape, then explored the application of porphyrin andthe coordination polymers in OFET memory. The main contents are shown as follows:1. By surfactant-assisted chemical precipitation method and the solvothermal methodcopper tetra (4-pyridyl) porphyrin (CuTPyP) and zinc tetra (4-pyridyl) porphyrin (ZnTPyP)micro/nano-structure, including two-dimensional CuTPyP single crystal nanosheets,three-dimensional (3D) nano-octahedral and micro-spindle and two-dimensional (2D) ZnTPyPnanosheets, have been synthesized have been respectively synthesized. The structure andproperty of the nanocrystals were characterize by SEM, TEM, UV-Vis and PL. It can beconcluded that positively charged head groups of cationic surfactant CTAB can lead to highersolubilization effect, and contribute to the formation of3D structure, while the negativelycharged SDS interacts with copper ions via electrostatic interaction, thus serves as a cappingagent prohibiting the3D coordination, and so2D nanoplates are formed in the presence of SDS.2. Non-volatile OFET memory device with TPyP-PMMA bilayer structure as electret hasbeen fabricated. It showed an ON/OFF ratio of105and memory window of115V under theprogramming Vg=200V and erasing Vg=-100V biases, which suggested that TPyP-PMMA isa prosperous electret material of OFET memory. The large charge trapping and transfer capacityrelates to the J-aggregation of porphyrin molecules. In addition, OFET memory based onCuTPyP nano-particle floating-gate layer has been explored and its memory performance is alsoinvestigated.3. Three kinds of Re-TCPP nanostructures with different morphology, including Y-TCPPpolygon nanosheet, Eu-TCPP nano particles and Er-TCPP nano square, have been prepared by surfactant-assisted hydrothermal method. By using P123(EO20PO70EO20) as the capping agent,Y (yttrium)-TCPP polygon nanosheets with its J-aggregation are formed. It can be concluded thatthe final size and dispersion of nanocrystals can be adjusted by changing the concentration ofligands and rare earth ions.