Sythesis And Characterization Of Sulfur Fused Molecule Graphene

Molecule graphene can be regarded as two-dimensional graphene segment.Due to their optoelectronic and self-assembling properties,molecule graphene have served as active components of organic electronic devices such as field-effect transistors,light emitting diodes and solar cells.On the other hand,thiophene and polythiophene derivatives show excellent electrochemical,optical,physical and biological properties,which also play an important role in materials science and pharmacy.Therefore,the introduction of thiophene units into the molecule graphene structure expectly manifest out new physicochemical properties,self-assembly performance and application prospect.The thesis is divided into following three parts:Part ?:Synthesis of sulfur fused molecule graphene.Firstly,3,3'-dibromo diphenyl acetylene was prepared from 1-bromo-3-iodobenzene by the one-pot Sonogashira reaction.A series of diphenyl acetylene compounds were synthesized by Suzuki coupling reaction between 3,3'-dibromo diphenyl acetylene and thiophene boronic acid or borates.Then,the symmetric hexaarylbenzene derivatives were synthesized by trimerization of corresponding diaryl acetylene compounds using Co2(CO)8 as catalyst.Finally,the sulfur fused molecule graphene were successfully synthesized by oxidative cyclization of the corresponding hexaarylbenzenes with FeCl3 as an oxidant.Part ?:The physicochemical properties of the sulfur fused molecule graphene.NMR and MALDI-TOF mass were used to characterized the sulfur molecule,The results indicated that compounds in the selected solvent did not exist in monomer but in certain aggregates.And TG results suggested they have high thermostability.Part ?:The sulfur fused molecule graphene wased used as monomer to synthesze the conjugated microporous polymers(CMPs).And the basic physicochemical properties of the conjugated microporous polymers were characterized.