Supramolecular Room Temperature Phosphorescent Materials Based on Cucurbit[8]uril for Dual Detection of Dodine

Abstract

In recent years, host–guest interactions of macrocycles have attracted much attention as an emerging method for enhancing the intersystem crossing of pure organic room-temperature phosphorescence. In this work, we utilize cucurbit[8]­uril (Q[8]) to specifically recognize synthetic bromophenyl pyridine derivatives (BPCOOH) to construct a highly stable charge-transfer dimer, where the bromophenyl pyridine moiety of BPCOOH is encapsulated by Q[8] in a 1:2 host/guest ratio. The assemblies exhibit specific recognition and detection properties for dodine on both fluorescence and phosphorescence spectra. Subsequently, the solid films were prepared by introducing carboxymethylcellulose sodium into the assemblies, which greatly enhanced its RTP performance by increasing the noncovalent bonding interactions, enabling the visualization of high-strength RTP and quantitative testing of the solid state. Finally, this material was used for the application of portable indicator papers to achieve rapid and visualized detection of dodine in daily life, which provides more possibilities for the potential applications of cucurbit­[n]­uril-based room-temperature phosphorescence material.

On-Site Detection of Neonicotinoid Pesticides Using Functionalized Gold Nanoparticles and Halogen Bonding

“…This increase, in turn, exacerbates the risk to both pollinators and humans. ,,, In recent years, this risk has been recognized with mitigation attempts that include policy adjustments and legislation to slow or reverse the observed trends of declining pollinating insect populations. ,, With the problems now being acknowledged, it is more critical than ever to develop practical tools to detect NN compounds on-site by nonexperts without requiring significant lab instrumentation. As such, research efforts have targeted NN detection, though the methodologies remain very instrumentation and/or personnel dependent, ,− including fluorescence methods , and more portable electrochemical techniques that often involve nanomaterials (NMs). ,,, With increasing legal measures to prohibit their use, the development of an easy-to-use, low-preparation NN detection system that is usable by nonexpert inspectors at manufacturing plants or pesticide storage centers on farms remains of high interest. As of today, commercial methodologies and materials of this nature are still rare, with only a few colorimetric test strips targeting organophosphate and carbonate pesticides …”

4,4′-Biphenyldisulfonic acid induced coordination polymers of symmetrical tetramethyl cucurbit[6]uril with alkaline-earth metals for detection of antibiotics

“…It has been recognized that coordination polymers based on π-conjugated aromatic ligands may possess photoluminescence and have been investigated for potential luminescent materials. 35 In consideration of the luminescence properties of cucurbit[n]uril 36 and the ligand, the solid state photoluminescence properties of 1-3, together with pure TMeQ [6] and the free ligands, were investigated. As shown in Fig.…”

Recent Advances of Carbon Dots with Afterglow Emission

“…[6] Consequently, the afterglow materials show great promising in some special fields, such as anti-counterfeiting, [7,8] sensors, [9,10] warning signs, [11] bioimages, [7,12] and so on. [13,14] Recently, compared to traditional metal-containing inorganic materials, metal-free afterglow materials have attracted great attention because of their facile preparation and purification, low raw materials, and excellent biocompatibility, [4,14,15] which mainly include organic crystals, [16,17] polymers, [18,19] supramolecular materials, [20,21] CDs, [4,22] and so forth. [23,24] Among them, CDs have numerous outstanding properties, such as small size, simple synthesis, facile activation of afterglow, chemical inertness, appreciable biocompatibility, and so on, [4,[25][26][27][28] which could evade the disadvantages of traditional afterglow materials.…”