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Fluorescent carbon quantum dots (CQDs) were synthesized from cucurbit[7]uril (Q[7]) and 2,2-bis(hydroxymethyl)propionic (DMPA) by a hydrothermal method. The Q[7]–DMPA complex was confirmed by X-ray crystallography. The CQDs showed blue fluorescence, photostability, and ionic strength stability. They were used to detect histamine with a low limit of 2.33 × 10−6 M. [ABSTRACT FROM AUTHOR]

The supramolecular assembly between twisted cucurbit[14]uril (tQ[14]) and p‐diaminoazobenzene (DAAB) has been successfully developed based on host‐guest interactions. Interestingly, as the temperature increases, the assembly dissociates and recovers when the temperature decreases. This shows that the association and dissociation of the supramolecular assembly can be reversibly controlled by the temperature. In addition, the tQ[14]‐DAAB complex also exhibits selective ultraviolet and colorimetric responses for AcO− and F−, the detection limits of the sensor for AcO− and F− are 5.17×10−6 M and 2.31×10−5 M, respectively. The tQ[14]‐DAAB exhibits potential analysis applications. [ABSTRACT FROM AUTHOR]

The interaction between acridine orange (AO) and cucurbit[10]uril, Q[10] affords the ternary complex 2AO@Q[10]. Subsequent addition of dodine (DD) displaces AO from the Q[10] cavity, and results in a fluorescent output. The effect of 20 different pesticides, as well as a number of common interferents, on the fluorescent output is presented. Results revealed that the system is capable of the selective recognition of DD, with a limit of detection (LOD) for DD of 1.12×10−7 M. [ABSTRACT FROM AUTHOR]

We developed a novel fluorescent molecule (SPy) that can form a supramolecular fluorescence probe with cucurbit[8]uril (Q[8]) (Q[8]@SPy) and exhibit a unique response to the herbicide difenzoquat in aqueous solution. Moreover, excellent optical properties in different solvents were shown by the fluorescence spectra of SPy. It was further shown that SPy could not only detect the water content in organic solvents, but also exhibit potential applications in the field of white-light emission materials and anti-counterfeiting. [Display omitted] • A novel multifunctional styrylpyridine derivatives (SPy) were successfully designed and prepared. • A supramolecular fluorescent probe Q[8]@SPy to realize a unique response to herbicide difenzoquat. • The SPy sensor can extended to white-light emission materials and anti-counterfeiting. In this work, we developed a novel fluorescent molecule (SPy) that can form a supramolecular fluorescence probe with cucurbit[8]uril (Q[8]) (Q[8]@SPy) and exhibit a unique response to the herbicide difenzoquat in aqueous solution. Moreover, excellent optical properties in different solvents were shown by the fluorescence spectra of SPy. It was further shown that SPy could not only detect the water content in organic solvents, but also exhibit potential applications in the field of white-light emission materials and anti-counterfeiting. [ABSTRACT FROM AUTHOR]