Lanthanide­(III)-based luminescent materials have attracted great research interests due to their unique optical, electronic, and chemical characteristics. Up to now, how to extend these materials into large, broad application fields is still a great challenging task. In this contribution, we are intended to present a simple but facile strategy to enhance the luminescence from lanthanide ions and impart lanthanide­(III)-based luminescent materials with more applicable properties, leading to meet the requirements from different purposes, such as being used as highly emissive powders, hydrogels, films, and sensitive probes under external stimuli. Herein, a water soluble, blue color emissive, temperature sensitive, and film-processable copolymer (Poly-ligand) was designed and synthesized. Upon complexing with Eu3+ and Tb3+ ions, the red color-emitting Poly-ligand-Eu and green color-emitting Poly-ligand-Tb were produced. After finely tuning the ratios between them, a standard white color emitting Poly-ligand-Eu1:Tb4 (CIE = 0.33 and 0.33) was obtained. Furthermore, the resulted materials not only possessed the emissive luminescent property but also inherited functions from the copolymer of Poly-ligand. Thus, these lanthanide­(III)-based materials were used for fingerprint imaging, luminescent soft matters formation, colorful organic light-emitting diode device fabrication, and acid/alkali vapors detection.

Due to the very similar chemical and physical properties, D2O and H2O cannot be discriminated easily by convenient and cost-effective way. Up to now, small organic molecules with active deprotonating...

Highly fluorescent covalent organic frameworks (COFs) are rarely obtained because of the π–π stacked layers with aggregation-caused quenching behavior. Unarguably, highly fluorescent COFs with tunable emission colors are even more rarely achieved. Herein, a general strategy to modify the classical COF material (named COF-1) by different fluorescent molecules via N → B interaction was developed. In this method, the boron-containing COF-1 acted as a porous and crystalline matrix as well as a reaction partner of Lewis acid; after interacting with fluorescent molecules with the anchoring group of pyridine (Lewis base), COF-1 takes a gorgeous transfiguration from a non-emissive powder into a highly fluorescent COF material with tunable emission colors. This disclosed method endowed the typical COFs with new emissive life and is speculated with the general research concept for all boron-containing COFs. Benefiting from the prominent fluorescent emission in the aggregation state, sensitive probes toward amines are achieved.

In this paper, we present a supramolecular method to fabricate soft fluorescent materials by simply grinding aggregation-induced emission (AIE) luminogens of TPA-Py with phenylboronic acid (PhBA), which proves the general research concept used to design fluorescent materials with tunable emission colors. The mechanistic study confirms that H-bonding plays a key role in gel formation and the smart responsive behavior to external stimuli (such as amine vapors and temperature changes). Thus, this result endows the fluorescent materials with the ability to detect amine vapors during fish spoilage. In addition, copolymerization and coprecipitation are consecutively performed to prepare highly cost-effective, conveniently storable, and safe to handle fluorescence spheres (named Fluo-Spheres), which can be employed as ultrasensors to monitor food safety in a noncontact mode.

Obtaining 18O-labeled organic substances is of great research importance and also an extremely challenging work. In this work, depending on the reversed Knoevenagel reaction, 18O-labeled aromatic aldehydes (3a–3x) are successfully obtained with high total yields (52–72%) and sufficient 18O abundance (90.90–96.09%).