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A paper-based sensor has been developed for light-up detection of amine vapors. This potable sensor shows high sensitivity, low detection limit, and good selectivity toward amine vapors. The sensor can be utilized for food spoilage detection and fluorescent security ink. [Display omitted] • A portable fluorescent sensor has been prepared for turn-on detection of amine vapors. • The sensor shows high sensitivity, low detection limit, and good selectivity for amine vapor detection. • The sensor can be applied for food spoilage detection and fluorescent security ink. Amines are widely used in many fields including agriculture, dyes, medicine and food processing. However, volatile amine vapors could initiate acute and serious damage to human bodies. Thus, highly efficient detection of volatile amine vapors has great importance for academic research as well as practical application. In this work, a turn-on type fluorescent sensor BZCO has been developed, which could be used to detect volatile amine vapors. The portable BZCO sensor can be easily prepared through immersing filter paper into its CH 2 Cl 2 solution and then evaporating it to dryness. This paper-based amine vapor sensor exhibits high sensitivity with a relatively low detection limit at 3.82 ppm. It also has good selectivity for discriminating amine vapors from volatile organic solvents. The detection mechanism has been confirmed by UV–vis spectral analysis. The practical applications of this paper-based BZCO sensor, such as detection of food spoilage and fluorescent security ink, have been investigated. This work has developed a new fluorescent sensor BZCO , which has broad applications in various fields, including amine gas detection, security and anti-counterfeiting materials. [ABSTRACT FROM AUTHOR]

Highly planar organic emitters have been developed from 4-styrylbenzonitrile structure, which show strong AIE properties and deep blue emission in solid state with good to excellent fluorescence quantum efficiency. [Display omitted] • 4-Styrylbenzonitrile derivatives are synthesized. • These planar fluorophores show strong AIE properties. • These compounds are efficient deep blue emitters in solid states with high quantum yields. Organic fluorescent molecules with π-conjugated system have shown great importance in numerous applications including bioimaging and optoelectronics. Planar aggregation-induced emissive (AIE) organic compounds with efficient solid-state luminescence are rarely developed and urgently needed in various applications. In this work, highly planar 4-styrylbenzonitrile derivatives have been synthesized. Most of these compounds show strong AIE properties with hundred-fold fluorescent enhancement. Moreover, these molecules are deep blue emissive in solid state, exhibiting good to excellent fluorescence quantum efficiency. The single crystal analysis shows that adjacent molecules could form special J-type aggregation. The intramolecular rotations are efficiently restricted by various noncovalent interactions. These molecular arrangements could be essential for the observed strong emission in aggregated and solid state. This work has paved a new path to efficient AIE-active organic emitters with highly planar conformations from 4-styrylbenzonitrile structure. [ABSTRACT FROM AUTHOR]