Synthesis And Applications Of Dendritic Conjugated Compound

This paper briefly described the progress and main applications of dendritic conjugated polymer and gold nanoparticles. Conjugated polybenzene with active groups was successfully synthesized via Diels-Alder addition reaction between cyclopentadienone and alkynyl compound. On one hand, dendritic polybenzene-gold composite nanoparticles with narrow size distribution were prepared. The size and morphology of the composite nanoparticles were controllable. On the other hand, after further chemical modification of the dendritic polybenzene, fluorescent probe of chromium were synthesized. The impact of various factors on the modification process was discussed in detail.1H-NMR, and FTIR were used to characterize the structure of the designed compounds. TEM was used to characterize the size and morphology of the composite nanoparticles. UV-vis and FL spectroscopies were used to characterize opitical properties of the compound and the composite nanoparticles. The designed rigid polybenzene was photo-stable and thermal-stable, and it was also a blue light-emitting material. With this polybenzen as protective layer, the gold nanoparticles were restricted to a fixed space and agglomeration was effectively avoided. Meanwhile, choosing dendritic polymer as a fluorescent probe, could enhance the fluorescence intensity and increase sensitivity for the purpose of identification of metal ions.