N-doped carbon quantum dots for the selective detection of OCl ions, bioimaging, and the production of FeO nanoparticles utilized in the synthesis of substituted imidazole.

Nitrogen-doped quantum dots (NCQD) were synthesized by solvothermal means using -phenylenediamine and l-tartaric acid. The resultant NCQD produced a high quantum yield (40.3%) and a vivid green fluorescence.

New phenanthridine-based multi-functional chemosensor for selective detection of Th and Hg ions in both aqueous and solid state.

A new phenanthridine-based multifunctional chemosensor (L), was synthesised via a green synthetic route and characterised using FT-IR, NMR and HRMS analysis. The sensing application of L towards metal ions in both solution and solid-state was studied using UV-vis and fluorescence spectroscopy, which exhibits dual-sensing behaviour for Th and Hg ions with good recyclability. In aqueous acetonitrile, L showed rapid response for the detection of environmental toxic metal ions and has a very low analytical detection limit of 125.

AIE Active Imidazole-Stilbene Conjugated Fluorescent Probes: Illuminating Latent Fingerprints and Advancing Anticounterfeiting Technologies.

Aggregation-induced emission luminogens (AIEgens) are widely used in the realm of latent fingerprint visualization owing to their luminosity and resistance to photobleaching. However, challenges such as significant background interference and limited resolution hinder their rapid advancement. Consequently, there is a pressing need to improve the detailed visualization of latent fingerprint (LFP) imaging, particularly for analyzing level 3 details.

D-π-A-π-D-Configured Imidazole-Tethered Benzothiadiazole-Based Sensor for the Ratiometric Discrimination of Picric Acid: Applications in Latent Fingerprint Imaging.

A tetraphenyl imidazole-appended benzothiadiazole-based fluorogenic probe (4,7-bis(4-(1,4,5-triphenyl-1-imidazol-2-yl)phenyl)benzo[][1,2,5]thiadiazole ()) has been successfully synthesized and characterized by NMR and high-resolution mass spectrometry (HRMS) spectral analyses. A low limit of detection (LOD) can be achieved to detect picric acid (PA; 7.89 nM).

The catalyst free synthesis of dibenzo[a,j]acridine and its applications in bioimaging of BF in HeLa cells.

In this paper, we discuss how tetrahydrodibenzo[a,j]acridine (4-HA) loses its hydrogen, which makes dibenzo[a,j]acridine (ARM) and also how 4-HA can be synthesized effectively using 2-tetralone in high yield. Dehydrogenative condensation and dehydrogenation are the two processes that make up the overall reaction of this synthetic approach. In addition, the presence of BF caused a remarkable fluorescence shift in ARM.

AIE active luminous dye with a triphenylamine attached benzothiazole core as a portable polymer film for sensitively detecting CN- ions in food samples.

Aggregation-induced emission (AIE) active 3-(3-(benzo[d]thiazol-2-yl)-2-hydroxyphenyl)-2-(4'-(diphenylamino)-[1,1'-biphenyl]-4-yl)acrylonitrile (BTPA) has been designed and synthesized herein, with the goal of detecting CN ions at a low-level in semi-aqueous medium. The deliberate addition of the electron-deficient alkene BTPA increased its sensitivity and selectivity to CN ions, with a better detection limit of 6.4 nM, unveiling the next-generation approach to creating sophisticated CN ions selective chemosensors.

Transformation of used aluminium foil food container into AlOOH nanoflakes with high catalytic activity in anionic azo dye reduction.

Synthesis of aluminium-based nanomaterials from aluminium-waste has received huge attention in current scientific research. Herein, an attempt was made to convert aluminium foil food container into aluminium oxyhydroxide (AlOOH) nanoparticles by a precipitation method. X-ray diffraction (XRD), spectroscopic and electron microscopic studies were employed to characterize impure AlOOH (containing sodium chloride, NaCl) and pure AlOOH samples.

Waste toner-derived porous iron oxide pigments with enhanced catalytic degradation property.

'Wealth from Waste' is an emerging concept, since it leads an effective waste treatment and waste recyclability. On the other hand, cost effective production iron oxide (IO) nanomaterials is still needed to develop, owing to their wide applications. Herein, we proposed a simple direct calcination method to prepare porous IO (FeO and FeO) nanomaterials from waste toner powder.

A benzothiazole-based new fluorogenic chemosensor for the detection of CN and its real-time application in environmental water samples and living cells.

Since the cyanide ion is used in a wide range of industries and is harmful to both human health and the environment, a number of research efforts are dedicated to creating fluorescence sensors for the detection of cyanide (CN). Herein, for the fluorescence detection of CN, a new highly selective and sensitive sensor 2-(3-(benzo[]thiazol-2-yl)-4-hydroxybenzylidene)-1-indene-1,3(2)-dione (BID) was created by conjugating a benzothiazole moiety with 1-indene-1,3(2)-dione. The donor and acceptor components of this hybrid receptor were covalently connected through a double bond.

Highly sensitive naphthalimide based Schiff base for the fluorimetric detection of Fe.

A simple 1,8-naphthalimide based Schiff base probe ()-6-((4-(diethylamino)-2-hydroxybenzylidene)amino)-2-(2-morpholinoethyl)-1-benzo[de]isoquinoline-1,3(2)-dione (NDSM) has been designed and synthesized for the specific detection of Fe based on a fluorimetric mode. The absorbance of NDSM at 360 nm increased significantly in acetonitrile : water (7 : 3, v/v) medium only in the presence of Fe ions with a visible colour change from yellow to golden yellow. Likewise, fluorescence emission intensity at 531 nm was almost wholly quenched in the presence of Fe.

Phenanthridine based rapid "turn-on" fluorescent sensor for selective detection of Th ion and its real-time application.

A new and highly sensitive and selective phenanthridine based sensor, 9-(7,8,13,14-tetrahydrodibenzo[a,i]phenanthridin-5-yl)benzo[h]quinolin-10-ol (PHBQ), was developed for the fluorescent ''turn-on'' detection of Th ion in acetonitrile: water (8:2) medium. The fluorescence intensity of PHBQ diminished in the region of pH 1 to 3 and could be recovered by adjusting the pH to above 4. The sensor PHBQ showed distinct spectral changes in response to Th ion over other competitive metal ions.

Colorimetric Metal Sensing of Fe and Cr and Photophysical and Electrochemical Studies Based on Benzo[4,5]thiazolo[3,2-]pyrimidine-3-carboxylate and Its Derivatives.

Benzo[4,5]thiazolo[3, 2-]pyrimidine-3-carboxylate derivatives () containing electron-donor and electron-acceptor groups with remarkable photophysical and electrochemical properties were synthesized. The changes in absorption properties of compound in the presence of various cations were evaluated. Compound can act as a colorimetric sensor for highly sensitive and selective detection of Fe and Crin acetonitrile solvent.

PFOM fillers embedded PVDF/cellulose dual-layered membranes with hydrophobic-hydrophilic channels for desalination direct contact membrane distillation process.

In this research work, novel perfluorooctanoic acid-modified melamine (PFOM) was synthesized as a hydrophobic filler using a facile one-pot synthesis. PFOM incorporating polyvinylidene fluoride (PVDF) solution was cast on a cellulose sheet to prepare a dual-layered membrane employing the phase-inversion technique for direct contact membrane distillation (DCMD) application. The influence of PFOM to tailor the dual-layered membrane performance was then investigated.

Fused pyrazole-phenanthridine based dyads: synthesis, photo-physical and theoretical studies, and live cell pH imaging.

The arrangement of small sized molecules with a scaffold structure plays an active role in the fields of sensors and health care. An efficient molecular design strategy for four pyrazole-phenanthridine based D-π-A luminophores, denoted as 2a, 2b, 2c and 2d was developed to investigate the effect of acid on the photo-physical properties of these dyes. Photo-physical studies of the synthesized probes showed distinct absorption and emission under various pH conditions.

(Tetrahydrodibenzo[,]phenanthridin-5-yl)phenol as a Fluorescent Probe for the Detection of Aniline.

Two (tetrahydrodibenzo[,]phenanthridin-5-yl)phenols that differ in their substituents at the para position (, R = H and , R = NEt) were designed and synthesized. The presence of a -NEt group in probe facilitates the twisted intramolecular charge transfer (TICT) process, making emissive, which distinctly coordinated with boron trifluoride in the presence of different amines with different electronic properties. A substantial increase in emission intensity with increasing viscosity of the surrounding environment and smooth formation of a planar complex with boron and Zn ions concluded the presence of a TICT process.

An insight into the photophysical properties of amide hydrogen bonded N-(benzo[d]thiazol-2-yl) acetamide crystals.

Three distinct, hydrogen bond associated N-(benzo[d]thiazol-2-yl) acetamides were synthesized by refluxing benzothiazoles with acetic acid. The nature of the assemblies was characteristic to the substituent in the benzothiazole moiety. In N-(benzo[d]thiazol-2-yl)acetamide, water acts as a bridge for forming three hydrogen bonds, as an acceptor to amide NH, and donors to carbonyl of amide and thiazole nitrogen assembles of three different N-(benzo[d]thiazol-2-yl)acetamide molecules.

Tuning the Electronic Properties of 2-Cyano-3-phenylacrylamide Derivatives.

We are the first to report the synthesis of a new class of 2-cyanoarylacrylamide (2-CAA) derivatives and observe that the synthesized 2-CAA shows fluorescence properties due to the formation of a dimeric interaction of hydrogen bonds between carbonyl oxygens and amide hydrogens (C═O···H-N-C═O···H-N···); i.e., dimers are linked through dimeric N-H···O hydrogen bonds.

Synthesis and biological evaluation of adamantane-based aminophenols as a novel class of antiplasmodial agents.

A series of adamantane based aminophenol derivatives were synthesized and evaluated for their antiplasmodial activity in vitro against Plasmodium falciparum (Pf_NF54) and resistant strain (Pf_K1). Herein, we report compounds resulting from this work that show excellent potency against both strains. Additionally, this series displayed excellent cytotoxicity selectivity index against THP1 cell line and had acceptable in vitro DMPK properties.