dibromo-substituted TPE 8 [26] and diiodobenzene derivative 10 [27], generating silole-ethynetype
polymers 9 and 11 with high molecular weights in high yields (Scheme 3A). Slightly
different from monodispersed silole molecules [28], 11 is weakly emissive in solution, exhibiting
a phenomenon of aggregation-enhanced emission (AEE) characteristic. The reason is that the
intramolecular motion of the phenyl rings in 11 is partially restricted by the entanglement of the
polymer chains in the solution state, which enables the polymers to show some sort of light
emission. The nanoaggregates of 11 serve as a fluorescent chemosensor for explosives such as
picric acid (PA) detection in a superamplification manner with high sensitivity, which will be
discussed later.