Synthesis and optical performance of micro-crosslinked polypyrrole derivatives
Organic conjugated polymers have been widely studied and applied in the fields of luminescent materials and devices due to their unique structure and photoelectrical properties.Four kinds of blue light micro-crosslinked polypyrrole derivatives were prepared through solution polycondensation by using pyrrole and single aldehyde benzaldehyde as linear monomers,and 1,4-phthalaldehyde as crosslinking monomer.The molecular and aggregation structure,microstructure,thermal behavior,UV-Vis absorption and fluorescence properties of the polymers were analyzed,and the effect of substituent type on their structure and optical performance was investigated.Results show that the polymers exhibits high glass transition temperature and thermal stability,perceived as amorphous and submicron spherical accumulation.Under the excitation of ultraviolet light at about 340 nm,the polymers can produce visible light at about 473 nm,i.e.blue luminescent materials.The structure and optical properties of the polymers are influenced by different substituents.The micro-crosslinked polypyrrole derivative,with an adjustable and controllable structure,is simple to prepare,exhibiting potential applications in the field of polymer light-emitting diodes.
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