Hg2+ was found to specifically induce the aggregation of perylene bisimide in a "thymine–Hg2+–thymine" binding motif and resultant aggregates showed highly selective sensitive turn-on fluorescence response for cysteine, with detection limit down 9.6 nM.

A detailed investigation of the absorption and CD signals Ag(I)−cysteine (Cys) aqueous solutions at buffered or varying pH has allowed us to suggest that coordination polymers are formed upon mixing Ag(I) Cys bearing a Ag(I)−Cys repeat unit. The formation shown be facilitated by both Ag(I)···Ag(I) interaction between side chains in polymeric backbone. former allows for an immediate spectral sensing with enantiomeric discrimination capacity high sensitivity selectivity, contribution...

Cu-BTC metal–organic frameworks possessing outstanding catalytic activity towards <italic>o</italic>-phenylenediamine were successfully synthesized to develop a novel sensing system for detecting gaseous formaldehyde.

We found that melamine in its protonated form could be triggered by oxoanions such as NO3−, PO43−, ATP, and SO42− to superstructures gelate a large amount of water molecules, presumably resulting from the electrostatic hydrogen bonding interactions operating synergistic manner; gelation can reversibly switched off/on increasing/decreasing pH or temperature.

We demonstrate for the first time a highly selective anion-responsive reversible gel–sol state transition in supramolecular hydrogel of Ag(I)-glutathione (GSH) coordination polymers, which allows facile and visual recognition I−via naked eyes even strongly colored and/or fluorescent background. Such strategy overcomes drawback spectral interferences are often encountered conventional colorimetric fluorimetric means. It was rationalized that I− functioned as depolymerizing agent Ag(I)-GSH...

A ratiometric luminescent sensing of Ag+ ion is developed via the Ag(I)–NCys coordination polymeric luminophore in situ formed aqueous solution upon mixing with designed fluorescent thiol ligand NCys.

In this study, we constructed a new fluorescent sensing for VB12 and investigated the mechanism of vitamin B12 (VB12) quenching fluorescence carbon dots (CDs). The suppression is attributed to inner filter effect (IFE) because overlap between UV-vis absorption spectrum emission/excitation spectra CDs. This CDs-based sensor provides obvious advantages simplicity, convenience, rapid response, high selectivity sensitivity, which has potential application detection in medical food industry.

In situ fabrication of metal nanostructures such as nanoparticles (NPs) and nanoclusters (NCs) in supramolecular gels (particularly hydrogels) is important for the construction novel promising bio-/chemosensing platforms, catalytic antibacterial functional materials, because their intriguing properties. Reported herein are our recent findings, which we employed sodium salts a series structurally similar bile acid derivatives (BAs) to construct hydrogels incorporating various ions including...

In this paper, Gd2O3@mSiO2@CaTiO3:Pr nanoparticles with a novel core/shell structure featured by mesoporous, magnetic and long persistent luminescent properties have been synthesized via facile template method. The as-prepared show ordered mesoporous characteristics, monodisperse spherical morphology narrow size distribution, so they are expected to be suitable as drug carrier. These exhibit bright red phosphorescence at 614 nm after UV irradiation the luminescence can persist for more than...

We report a simple and environmentally friendly method for the in situ synthesis of red emissive Cu nanoclusters (NCs) supramolecular hydrogels via employing series bile acid derivatives (BAs) as pre-gelators. The encapsulated NCs demonstrated excellent catalytic performance methylene blue (MB)–hydrazine (N2H4) reduction system.

Although Fe3O4 magnetic nanoparticles (MNPs) have recently been developed as artificial enzymes in a wide range of applications, there is debate on whether the observed peroxidase-like activity originates from nature intact MNPs themselves or Fenton reaction surface bound and free ferric/ferrous ions. In this work, Fe3+ ions serving peroxidase mimic towards 3,3′,5,5′-tetramethyl benzidine (TMB)–H2O2 system was investigated detail for first time. Experimental results revealed that much higher...

We report a novel example of ligand-chirality finely controlled in situ supramolecular hydrogel formation based on the coordination phenylalanine (Phe) to Cu(II) with higher selectivity over other metal ions. As decreasing both enantiomeric excesses (ee%) ligand Phe towards its D- and L-forms, gelation ability Phe-Cu(II) metallogelator was found be weakened eventually disappeared, which likely resulted from stereoselectivity Phe. Intermolecular hydrogen bonding, hydrophobic and/or π–π...

In this paper, near-infrared emitting long-persistence luminescent Zn3Ga2Ge2O10:Cr3+ (ZGG) nanoparticles with diameters of 30-100 nm and bright luminescence were prepared by a sol-gel synthesis method. After the surface amination, further bioconjugated breast cancer-specific monoclonal antibody (anti-EpCAM) to form ZGG-EpCAM nanoprobes which can specifically target cancer cell lines (MCF7) in vitro. The results vitro images show that signals from cells treated are stronger than those...

A nanohybrid consisting of water-soluble thioglycolic acid (TGA)-capped CdTe nanocrystals (NCs) and methylene blue (MB) was designed as a label-free luminescent signaling platform for DNA. This sensing system identified to operate under the photoinduced electron transfer (PET) mechanism in which MB is acceptor binding site designated target molecule We showed that bound with TGA-capped NCs via strong electrostatic interactions resulted an efficient quenching photoluminescence (PL) NCs....

A novel sensor for metal ions by mean of CDs with a PL enhancement response, which shows high sensitivity and selectivity. Furthermore, the CDs-Al³⁺ system could be employed to probe F⁻ anions based on “on–off” model.

In the current research work, safranine T (ST) was chosen to be guest, and preparation of carbon dots (CDs) done by a one-step hydrothermal methodology with citric acid (CA) precursor, besides surface passivation species in consequent host–guest CDs. addition, CDs that had high-luminescence properties were prepared solid liquid states, respectable fluorescence quantum yield 15.2% (liquid) 39.9% (solid), which is higher as compared majority reported orange fluorescent Meanwhile, red...

A simple, highly sensitive and selective PL sensing platform for histidine has been developed, based on the oxidase-like activity of Cu²⁺ions.

Developing robust and facile catalytic systems for converting nitroaromatic compounds to NH2-containing are of importance decrease or even eliminate their toxicity risk in the environment. In view situ formed metal nanoparticles, ion (Cu2+, Ag+, AuCl4−, Co2+ Ni2+)/NaBH4 were employed catalyze reduction reaction compounds. By employing 4-nitrophenol (4-NP) 4-aminophenol (4-AP) as a model reaction, effects concentration NaBH4, 4-NP ions on rate constants reactions systematically investigated....