Design and optimization of encapsulated sensor materials with diverse binding sites for efficient cyanide ion detection.

Developing colorimetric and fluorimetric sensors with a new design strategy incorporates the same electron donor and acceptor units by changing the binding site by expecting different mechanisms. The sensors YS and RS have the D-π-A concept, having phenothiazine as an electron donor and benzothiazole as an electron acceptor for sensing cyanide ions in various spectral techniques. Both the sensors showed an efficient color change with cyanide ion in day light and UV light, which was confirmed by UV-vis and Fluorescence spectral analysis.

Synthesis of Highly Stable Coumarin-Based Fluorescent Dye, Its Photophysical Properties and Stability in PLA Film and Application Towards Sensing Toxic Ions.

New materials were designed and synthesized by introducing electron donor and acceptor groups using coumarin as the basic unit. In addition, two more materials with similar structures were synthesized for the comparison of their optical properties and stability. The solvent effect and the photo physical aggregation properties of aggregation caused quenching (ACQ) in the ratio of water and DMF were also investigated.

An affordable, field-deployable detecting system for cyanide ion - Investigating applications in real time uses.

A highly efficient system that incorporates the instantaneous visualization of the cyanide ion in water was synthesized by keeping the fluorophore system (electron donor) as a julolidine-coumarin conjugate and changing the electron acceptor unit. The probes exhibit a notable color change in normal and UV light. The probe interaction modalities are based on the ICT process.

Development of a novel sensory material for rapid detection of mercury ions in various water sources: Solution and solid-state analysis.

A xanthene propane nitrile-based sensor material was successfully prepared, and an attempt towards the preparation of polymer bead form was made for the sensitive or selective detection of mercury ions (Hg) in water. The sensor material in solution as well as in polymeric form showed amazing selectivity over other added metal ions with a naked eye color change, UV visible spectral and fluorescence spectral change, and a rapid and excellent color change from colorless to purple. The H NMR study exposed the probable binding site of the probe with the added mercury ion.

Tailored fluorophore design: Enhancing selectivity for cyanide ion sensing in water and food samples, and innovative device development.

A rigid fluorophore unit of Julolidine/coumarin fused with an indolium-conjugated system was built for the immediate and effective recognition of cyanide ions in a 90 % aq. DMSO solution. The probes are capable of displaying better sensitivity/selectivity for the cyanide ion over a wide range of other interfering ions.

Optimizing cyanine dye properties for enhanced dyeing and inkjet printing on diverse Substrates: Photophysical and colorimetric investigations.

Cyanine-based cationic dyes with different substituents in the donor unit were easily synthesized using readily available starting materials. The prepared dye molecules were spectroscopically characterized by NMR, FT-IR, and HR-Mass, and their thermal stability was measured by TGA, DSC, and XRD. Based on the TGA and DSC measurements, it was concluded that all the dyes are thermally stable up to 200 °C.

An ICT-based highly fluorescent isoquinoline scaffold for selective Hg(II) detection in real-water samples: Development of a smart, low-cost RGB-Arduino electronic platform.

Selective detection and quantification of Hg ions is crucial to minimize health and environmental risks. Fluorescent organic small-molecule probes have been expeditiously utilized owing to their unique set of improved properties. However, isoquinoline core has not been extensively explored as a fluorescence platform partly due to synthetic challenges.

A novel fluorophore with multichromic effect and its application in LED light for the volatile vapor detection.

Successfully designed and synthesized diaryl maleimide DAM, and their structure was confirmed by mass spectroscopy and NMR techniques. They investigated their photophysical properties, such as solvatochromic and the aggregation effect of AIE/ACQ on the water/DMF ratio, and other studies of solid-state mechanofluorochromic, such as grinding, exposure to solvent fumes, hydrostatic pressures, and vapochromic. Interestingly, the solvent methods gave very similar results in both the dissolving phase and the vapor phase.

Highly emissions of TPA-linear based pyrazine derivatives with different mechanochromic luminosity.

We designed the TPA-based linear pyrazine derivatives of PP-1 and PP-2, synthesized using the conventional Suzuki cross-linking reaction. It was followed by photophysical studies such as aprotic solvent (Haxene to DMF). A red-shift was observed from the non-polar aprotic solvent to the polar aprotic solvent, and the emission intensity was gradually decreased.

Effects of Xanthene Fluorophore on Light Physical Properties and their Dyeing Performance on Modacrylic Fabrics.

We designed the new xanthene dyes by introducing the donor and acceptor group of electrons in the 5' position of the carboxyphenyl ring. These synthesized dye molecules were identified using spectroscopy. And the photophysical studies, such as solvent optimization, were further explored before and after photodegradation of all synthesized dye compounds in both states (solution and solid).

A novel class of xanthene dyes with chemically linked UV absorber molecule and their photophysical properties.

In this paper, we prepared a new class of chemically linked UV absorber XU2 & XU3, and their photophysical, chemical properties and substrate durability were investigated. Spectroscopic behavior at various solvent and pH levels for this dye solution has been evaluated. Successfully designed an open ring form of xanthene moiety, linked a UV absorber to it, and made XU2 & XU3 that have shown good absorbance and emission band maxima at all solvents and pH mediums.

A Pyrene-Tetrazole Fused Fluorescent Probe for Effective Real Time Detection Towards Aluminium Ion.

We constructed a novel-binding site for metal ion detection using a fused tetrazole ring conjugated with aminopyrene (R). The designed structure of the molecule was successfully synthesized and determined the probe's selectivity by testing various metal ions and found that the probe effectively detects Al ion visually. Checked the sensing ability of the probe with different approaches (fluorimetric and colorimetric), and the effectiveness is double confirmed.

Simple easy to make xanthene based optical probe for solid and liquid state Hg ion detection.

An easy to make xanthene based optical probe synthesized, precise recognition towards mercury ion been achieved by the probe RP and can detect Hg effectively in both for solid and liquid state with a vivid color change. The other tested ion showed no interference, visual and instrumental methods confirms the probe selectivity. Stoichiometry (1:1) confirmed by job's plot, plausible binding of Hg ion with the probe confirmed by mass and NMR studies.

A simple tactic synthesis of hollow porous graphitic carbon nitride with significantly enhanced photocatalytic performance.

Hollow porous graphitic carbon nitride (porous CN) was synthesized via a simple tactic method, and the resulting porous CN showed an effectively modified surface area, crystal structure and enhanced photocatalytic performance. Optical and electrochemical characterization results demonstrated an increase in the charge transfer rate and a decrease in recombination tendency.

Spontaneous optical response towards cyanide ion in water by a reactive binding site probe.

Indolium derivatives bearing diphenyl amine (R1) and dibenzylamine (R2) linked through benzene was designed, synthesized, characterized and its cyanide recognizing abilities are studied in 100% water. The probes were exhibited dual channel properties i.e.

Ultrasonic synthesis of α-MnO nanorods: An efficient catalytic conversion of refractory pollutant, methylene blue.

In this work, uniform α-MnO nanorods were synthesized via a simple hydrothermal followed by ultrasonication method using ultrasonic bath (20 kHz, 100 W) without using any surfactant and template. The crystallographic phases and surface morphology were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transition electron microscopy (TEM) analysis, respectively. Functional group identification and chemical states of α-MnO nanorods were confirmed by Fourier-transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS).

A Chromone Based Fluorescent Probe for the Effective Detection of Aluminium Ion.

A new chromone moiety fused with phenyl hydrazine carboxamide as a binding site for metal ion was designed and synthesized as a colorimetric/fluorimetric probe for selective sensing of Al ion. The absorption and fluorescence spectral results showed selective and sensitive recognition of Al with no significant interference from other competitive metal ions. The addition of Al to brought a prompt color change from colorless to yellow and the fluorescence response with Al among different cations was studied.

Ultrasound-assisted method to improve the structure of CeO@polyprrole core-shell nanosphere and its photocatalytic reduction of hazardous Cr.

In this work, the CeO@polypyrrole (CeO@PPy) core-shell nanosphere has been synthesized via an ultra-sonication method using bath type (WUC-D22H, Daihan Scientific, Korea) and they are utilized for the photo-reduction of hazardous Cr to benign Cr. The ultrasonic frequency and power were 20 kHz and 100 W, respectively. The PPy shielded CeO in aqueous solution could prevent the dissolution of CeO and to improve the photocatalytic ability of CeO.

Visible Light Photo-Sensitized Metallo-Porphyrin/TiO₂ Photocatalyst and Its Related Self-Cleaning Effects in Poly Ethylene Terephthalate.

Dye degrading property to exhibit self-cleaning effect in Poly Ethylene Terephthalate (PET) through photocatalytic effect by Metallo porphyrin and TiO₂ has been studied in detail. PET has been modified by step wise deposition of anatase TiO₂ and Metallo porphyrin (CuTCNPP, NiTCNPP, ZnTCNPP), self-cleaning property of the modified PET has been studied by photo degradation of rhodamine B (RB) by irradiation under visible light and the degrading ability and the efficiency has been monitored using UV-Vis spectral technique by measuring the change in concentration of RB in the PET at different time intervals. Stability of Metallo porphyrin in PET also measured by UV-Vis spectral method.

Tuning of the Topochemical Polymerization of Diacetylenes Based on an Odd/Even Effect of the Peripheral Alkyl Chain: Thermochromic Reversibility in a Thin Film and a Single-Component Ink for a Fountain Pen.

The topochemical polymerization of diacetylenes (DAs) is closely related to the length of their alkyl chain. DA monomers have two types of alkyl chain side groups: the inner alkyl chain and the outer alkyl chain, that is, the peripheral alkyl chain. Herein, we designed and synthesized a series of DA monomers that possess bis-amide linkages with different peripheral alkyl chains ( n = 6-9; DA1-DA4).

Thermally Reversible Fluorans: Synthesis, Thermochromic Properties and Real Time Application.

In the present study, two fluoran molecules (TH1 and TH2) have been synthesized, and their reversible thermochromic properties have been investigated. This work demonstrates the thermochromic reversibility of the fluoran. Furthermore, the three-component mixtures that comprising fluorans (TH1/TH2), bisphenol-A (color developer), and methyl stearate a low melting solvent were used to examine the thermochromic behavior with sturdy heating and cooling rates and the thermochromic properties of the fluorans were detailed using UV-Vis, reflectance and FT-IR spectroscopic techniques.