AIEE Active Azomethine-Based Rhodamine Derivative For Ultrasensitive Multichannel Detection of Au Through a Fluorimetrically, Electrochemically, and RGB-Based Sensing Assay.

In this study, a novel rhodamine-based optically and electrochemically active chemosensor, integrated with a p-DMAC moiety, demonstrated extremely selective identification of Au ions relative to other metal species, including (Li, Na, K, Ba, Ca, Mg, Co, Mn, Zn, Pb, Ni, Fe, Hg, Fe, Cd, Pd, Al, Cr, Cu, and nitrate salt of Ag). These compounds demonstrated a novel and outstanding aggregation-induced emission enhancement (AIEE) behavior by aggregating in DMF/HO medium. Furthermore, the degree of quenching was varying linearly with a Au concentration from 0 to 40 nM, with a lower detection limit by RH-DMAC nanoaggregates of 118.

Dualistic Fluorescence as Well as Portable Smartphone-Assisted RGB-Relied Sensing Assay for the Ultra-Sensitive Determination of Pendimethalin in Food and Water Samples by AIEE Active Organic Probes.

Herein, a peculiar fluorometric as well as smartphone-assisted RGB-relied sensing assay is introduced for determining pendimethalin (PDM) herbicide contents (in parts per trillion level) based on the anthracene-incorporated pyrimidinone/thione probes (S1 to S4). These compounds offered a unique and impressive aggregation-induced emission enhancement (AIEE) behavior by aggregation in HO-dimethylformamide medium. Furthermore, these AIEE active compounds were found to display superior selectivity and extraordinary sensitivity for PDM detection via fluorescence quenching response.

Ag and Au Nanoparticles as Color Indicators for Monomer/Micelle-Nanoparticle Interactions.

Ag and Au nanoparticles (NPs) were used as color indicators to determine the monomer/micelle adsorption on the NP surface. A simple methodology based on the color change of Ag/Au NPs upon interacting with surface-active molecules was developed. A contrasting color change occurred when NPs interact with the monomer/micelle.

Graphitic carbon nitride nanosheets (g-CN NS) as dual responsive template for fluorescent sensing as well as degradation of food colorants.

In this work, fluorescent g-CN NS with laminar morphology and ultrathin thickness were fabricated. The as synthesized NS were well characterized by UV-Visible and Fluorescence spectroscopy, FT-IR, XRD and HR-TEM. The bright blue fluorescent suspension of g-CN NS was utilized for efficient detection of food colorant; tartrazine (Tz) and sunset yellow (SY).

Polyhydroquinoline nanoaggregates: A dual fluorescent probe for detection of 2,4,6-trinitrophenol and chromium (VI).

Fluorescent polyhydroquinoline (PHQ) derivative was fabricated utilizing one-pot engineered course. The PHQ derivative indicated aggregation induced emission enhancement (AIEE) with arrangement of nanoaggregates of size 11-13 nm in 95% watery DMF medium. The fluorescence emission of PHQ nanoaggregates was extinguished by including TNP and Cr (VI).

Bio-polyphenols promoted green synthesis of silver nanoparticles for facile and ultra-sensitive colorimetric detection of melamine in milk.

Green, simple and quick melamine sensing assays for highly efficient detection of melamine down to nM level have been reported. Biopolyphenols (rutin & curcumin) were used as reducing and stabilizing agents for the synthesis of silver nanoparticles (AgNPs). The synthesis of AgNPs was confirmed by FTIR, UV-Visible, XRD and HRTEM-EDS analysis.

Efficient solar light-driven degradation of Congo red with novel Cu-loaded FeO@TiO nanoparticles.

In this work, Cu-loaded FeO@TiO core shell nanoparticles were prepared in a single pot by coating of TiO on FeO nanoparticles followed by Cu loading. X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), thermogravimetric analysis (TGA), Brunauer-Emmett- Teller (BET), vibrating sample magnetometry (VSM), X-ray photoelectron spectroscopy (XPS), and valence band X-ray photoelectron spectroscopy (VB XPS) techniques were used for characterization of as prepared nanoparticles. Synergism between copper and titania was evaluated by studying the solar light-driven photodegradation of Congo red dye solution in the presence of FeO@TiO nanoparticles on one side and Cu-loaded FeO@TiO nanoparticles on the other side.

CuFe2O4 magnetic heterogeneous nanocatalyst: Low power sonochemical-coprecipitation preparation and applications in synthesis of 4H-chromene-3-carbonitrile scaffolds.

The paper presents the synthesis and catalytic activity of CuFe2O4 nanoparticles. The CuFe2O4 nanoparticles have been prepared by sonochemical route under low power ultrasonic irradiation (UI) and using silent stirring at room temperature only (ST) along with co-precipitation method, without using any additive/capping agent. The synthesized magnetic nanoparticles were successfully used and compared for the synthesis of 4H-chromene-3-carbonitrile derivatives.

Single step in situ synthesis and optical properties of polyaniline/ZnO nanocomposites.

Polyaniline/ZnO nanocomposites were prepared by in situ oxidative polymerization of aniline monomer in the presence of different weight percentages of ZnO nanostructures. The steric stabilizer added to prevent the agglomeration of nanostructures in the polymer matrix was found to affect the final properties of the nanocomposite. ZnO nanostructures of various morphologies and sizes were prepared in the absence and presence of sodium lauryl sulphate (SLS) surfactant under different reaction conditions like in the presence of microwave radiation (microwave oven), under pressure (autoclave), under vacuum (vacuum oven), and at room temperature (ambient condition).