Silole‐core phenylacetylene dendrimers and their application in detecting picric acid

Abstract

in Wiley Online Library (wileyonlinelibrary.com).Silole-core phenylacetylene dendrimers were designed and synthesized, among them, the model compound (n ¼ 0) and the first generation of the dendrimer (n ¼ 1) were obtained by the reaction of 2,5-dibromosilole with corresponding terminal alkynes, the second generation of the dendrimers (n ¼ 2) was synthesized from 2,5-diiodosilole. These compounds indicated the absorptions of both phenylacetylene dendrons (250-350 nm) and silole core (400-500 nm). The first generation displayed efficient energy transfer from phenylacetylene dendrons to silole core, whose energy transfer efficiency was as high as 80%. These compounds were used as chemical sensors to probe explosive, for picric acid (PA), the Stern-Volmer constants of model compound and the first generation are 7120 and 5490M À1 , respectively.

Ion and Molecular Recognition Using Aryl–Ethynyl Scaffolding

“…These fully conjugated dendrimers exhibited a fluorescence emission which was selectively quenched in the presence of nitrated aromatics. [101] …”

Synthesis of Siloles (and Germoles) that Exhibit the AIE Effect

“…An earlier study with a more complex 2,5-alkynyl substituent with phenyleneethynylene strands with up to three aromatic rings and a total of three alkynes also provided quantum yields for the solid state, but the values were less that 15% (the solid-state form was not specified) [44]. Another study included phenylacetylene dendrimers but these did not exhibit an AIE effect [45].…”