Abstract
Sensitive, selective, low-cost, and simply designed detectors for THF among other vapour organic compounds (VOCs) are highly attractive. Self-assembled molecular films with remarkable selective vapoluminescent response to VOC THF were fabricated using drop-casting of calix[4]azacrown-based J-aggregates. The latter, stabilized via C–H⋯π and C–H⋯O hydrogen bond networks, assemble into nanoparticles that exhibit aggregation-induced emission (AIE) effect, which produces violet emission at room temperature in acetonitrile. The films are highly ordered and switch order at high temperature, leading to 2.5-fold luminescence enhancement and responsive behaviour.
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