Synthesis And Properties Study Of Molecules Based On Porphyrin Derivatives Containing Naphthlene Anhydride

It is an era of rapid development of information and multimedia technology.With the increasing demand to memory device,traditional storage medium has been unable to meet people's needs,because of the storage limit and the expensive cost.Hence,it is of great significance part in the scientific community in developing materials with high-density storage unit.Organic or polymer functional materials devices have drawn a great many interests in the scientific community,due to its large capacity and high-density storage characteristics.By the molecular design,we could get organic/polymer with diverse of structure,which can give a variety of device performance.And the small size of organic/polymer molecular give rise to produce nano-level devices,which can achieve ultra-high density storage.Compared with the device produced by polymer,the monomolecular compound can be used as the active layer of the device,and a memory device with a lower threshold voltage and a faster response time can be obtained.Therefore,monomolecular compounds will be the ideal material of ultra-high density storage devices in the future.Porphyrins have a high charge density,which become higher in high temperature and the other performance are stable.This is very useful for the device.Porphyrin has attracted much attention due to its outstanding properties.First,we can design different porphyrin pendant groups or different metals complex,adjusting their potential.Second,porphyrin has a variety of oxidation and reduction potential,which can also be converted to each other.Third,different potentials can be different storage bits,which are expected to achieve ultra-high density storage.In this paper,three compounds,P-DATPP-NTA,p-DATPP-NBA,p-DATPP-NDA,were prepared by the reaction of 5,10-bis(4-amino-phenyl)-15,20-diphenylporphyrin(p-DATPP)with different naphthalic anhydride(NTA,NBA and NDA)reacted in DMAc,pyridine and acetic anhydride.And Zn-p-DATPP-NTA,Zn-p-DATPP-NBA,Zn-p-DATPP-NDA were obtained by further complexing the three above-mentioned compounds with metal zinc.The six acceptor-donor-acceptor compounds were tested for optical,electrochemical and storage properties.The Q band of UV absorption of the metal compounds decreased from four to two,and the S band was slightly redshift.The results of molecular simulation show that the distance between the positive and negative charge of the compound after the introduction of the receptor is reduced and the structure becomes more stable.At the same time,the simulation results reveal the charge transfer mode and the electron cloud density distribution,which provides theoretical support for the device storage performance test.The?-? results show that the p-DATPP-NDA shows a WORM type storage type with a switch ratio of 104.