New amide macrocycles based on tetraphenylethylene (TPE) were synthesized. It was found that the TPE amide macrocycles could form microtubes in H2O-THF with 70-80% water by the rolling up of big nanoribbons but produced hollow microspheres in 90% or more water by the winding of thin nanoribbons. The microtubes emitted blue light while the hollow microspheres showed blue-green fluorescence.
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Song et al. (2014) studied this question.
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