Synthesis And Optoelectronic Properties Of The Of Dendritic Silole Compounds

A dendrimers polymer named 1,3,5-trisilolesbenzene was designed and synthesized, it included Silole dendrons and phenylacetylene. For the dendron we have designed three synthetic routes. Firstly, we designed the reaction between triethynylbenzene and 1,1-dimethyl-3,4-diphenyl-2-Cl-5-phenylethynylsilole, the first route is not proper because of the low yield of the target and the low activity. Secondly, we designed the reaction between 1-triisopropylsilylethynyl-3,5-ethynylbenzene and 1,1-dimethyl-3,4-diphenyl-2-Br-5-phenyl-ethynylsilole. The second route is not proper because of the substrate is destroyed when deprotection. Thirdly, we desigined the protective group was trimethylchlorosilane, after deprotection, the latter reacted with triiodo-benzene to obtain the target dendrimer 1,3, 5-trisiloles-benzene.The compounds were confirmed by1H NMR,13C NMR, El or ESI. Their optoelectronic property, such as UV-vis, Fluorescent, were also studied. These compounds have good AIEE effect, when water was added up to 70%, the fluorescent become stronger.Their fluorescent were quenched in present of PA or TNT, the Stern-Volmer constant for PA and TNT was 8762 M-1and 5704 M-1 respectively, and the limit of detection is lppm. It means that they can be used as sensor to detected nitroaromatic explosives.