Conformation-controlled emission of AIE luminogen: a tetraphenylethene embedded pillar[5]arene skeletonElectronic supplementary information (ESI) available: Experimental details, spectroscopic data. CCDC 1571969 and 1572442. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c7cc08561c

An unprecedented meso -decorated pillar[5]arene derivative, EtP5A-DPE , embedded with a TPE unit was prepared and structurally characterized. In the crystal, the incubation of the guest 1,4-dicyanobutane molecule inside the tetraphenylethene-embedded pillar scaffold induces a significant change in the molecular conformation, shutting down the AIE emission of this compound. Incubation of a guest 1,4-dicyanobutane molecule inside a tetraphenylethene-embedded pillar scaffold induces a significant change in the molecular conformation, shutting down the AIE properties.