Ultrasensitive water sensors based on fluorenone-tetraphenylethene AIE luminogens

Abstract

Two fluorenone-tetraphenylethene AIE luminogens have been designed and synthesized, which exhibit the ultra-high sensitivity to trace water in organic solvents such as THF or dioxane.

Development of an intramolecular charge transfer-type colorimetric and fluorescence sensor for water by fusion with a juloidine structure and complexation with boron trifluoride

“…[19][20][21][22][23][24][25][26][27][28] Generally, in each system, there is a specic range of water concentration available for detection; AIE is observed in high water concentrations, 7,29,30 whereas other systems exhibit optical changes in a relatively low concentration range. In this context, a reasonable approach to incorporating two mechanisms into one sensor molecule has been developed to detect and determine water in organic solvent sensitively in a wide concentration range, including the combinations of ICT or PET and AIE, [32][33][34][35][36][37][38][39] two water-induced reactions, 40 and two ICT-related mechanisms, 41,42 with rare exceptions based on one mechanism. 23,[43][44][45][46][47][48][49] However, the pioneering systems still have several problems to be solved, such as the appearance of non-response ranges to variations in water content and the indiscernible small changes in the photoabsorption and uorescence spectra as well as by the naked eye.…”

Ordered mesoporous NiFe2O4 with ultrathin framework for low-ppb toluene sensing

“…Chemoreceptive gas sensors have attracted growing attention due to their potential application in monitoring air quality, diagnosing disease, and detecting volatile organic compounds (VOCs) or other hazard gases [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Toluene as one of the typical VOCs is widely used but directly harmful to human's health, for which a guide value of 70 ppb (part per billion) in indoor air has been established by the world health organization [18].…”

Aggregation‐Induced Emission for Visualization in Materials Science

“…The fluorescent enhancement of AIE moleculesi nt he aggregated state enables the turn-one mission for detection. [77] Therefore, AIE molecules have been widely appliedint he detection of metal ions, [78] volatile organic compounds (VOC), [79] hazardous substances, [80] humidity, [81] and multi-targets. [82] Moreover,t he detection on paper strips has successfully demonstrated the concept of "lab-on-paper", facilitating direct observation.…”