Optoelectronic, femtosecond nonlinear optical properties and excited state dynamics of a triphenyl imidazole induced phthalocyanine derivative.

A novel zinc phthalocyanine derivative [2(3), 9(10), 16(17), 23(24) tetrakis-4-((4-(1,4,5-triphenyl-1-imidazol-2-yl)phenyl)ethynyl)phthalocyanine zinc(ii) (PBIPC)] was synthesized by incorporating a triphenyl imidazole moiety at its peripheral positions. The detailed mechanisms of absorption, emission, electrochemical, nonlinear optical (NLO) and photophysical (excited state dynamics) properties of PBIPC were explored. The absorption and emission properties of the compound were studied in different solvents.

Low temperature synthesis and characterization of single phase multi-component fluorite oxide nanoparticle sols.

We report for the first time a simple, scalable approach for the synthesis of single-phase multi-component fluorite oxide nanoparticle sols: GdLaYHfZrO (GLYHZ) and GdLaCeHfZrO (GLCHZ) using chemical co-precipitation followed by peptization in acidic medium under mild conditions (≤80 °C). High resolution transmission electron microscopy (HRTEM) along with selected area electron diffraction (SAED) studies confirm fully crystalline single-phase cubic fluorite nanoparticles having a particle size of about 2-3 nm with a narrow size distribution was obtained. The powder X-ray diffraction (XRD) and Rietveld refinement studies of samples calcined at 500 °C for 4 hours confirm a single phase solid solution and a lack of secondary phases.

Two step, one-pot sequential synthesis of functionalized hybrid polyheterocyclic scaffolds a solid state melt reaction (SSMR).

A new one pot assembly of highly functionalized benzo[]phenazinone fused chromene/bicyclic scaffolds a domino Knoevenagel intramolecular hetero-Diels-Alder (IMHDA) strategy using a solid state melt reaction (SSMR) of 2-hydroxynaphthalene 1,4-dione, -phenylenediamine, -allyl salicylaldehyde/-vinyl salicylaldehyde derivatives is reported. The formation of five new bonds (two C-C bonds and three C-O bonds), three six-membered rings, and three stereogenic centers in a one-pot manner is very attractive. Ease of reaction with short time, good yields with water as the only byproduct and work up free procedure are some of the excellent features of the present protocol.

3D printable SiO nanoparticle ink for patient specific bone regeneration.

Sodium alginate and gelatin are biocompatible & biodegradable natural polymer hydrogels, which are widely investigated for application in tissue engineering using 3D printing and 3D bioprinting fabrication techniques. The major challenge of using hydrogels for tissue fabrication is their lack of regeneration ability, uncontrolled swelling, degradation and inability to hold 3D structure on their own. Free hydroxyl groups on the surface of SiO nanoparticles have the ability to chemically interact with alginate-gelatin polymer network, which can be explored to achieve the above parameters.

Enhanced photoelectrochemical activity of Co-doped β-InS nanoflakes as photoanodes for water splitting.

This work is primarily focused on indium sulfide (β-InS) and cobalt (Co)-doped β-InS nanoflakes as photoanodes for water oxidation. The incorporation of cobalt introduces new dopant energy levels increasing visible light absorption and leading to improved photo-activity. In addition, cobalt ion centers in β-InS act as potential catalytic sites to promote electro-activity.

Dual function of molybdenum sulfide/C-cloth in enhancing the performance of fullerene nanosheets based solar cell and supercapacitor.

Quantum dot solar cells (QDSCs) with hexagonal fullerene nanosheets (C-NS) embedded in a titanium oxide/cadmium sulfide (TiO/CdS) photoanode coupled with a carbon-cloth (C-cloth) coated with molybdenum sulfide (MoS) counter electrode (CE) are studied for the first time. C-NS due to a favorable work function of 4.57 eV and a conductance of 1.

Highly Active Dinuclear Titanium(IV) Complexes for the Catalytic Formation of a Carbon-Heteroatom Bond.

A series of mononuclear titanium(IV) complexes with the general composition κ-[R{NHPhP(X)}Ti(NMe)] [R = CH, X = Se (3b); R = trans-CH, X = S (4a), Se (4b)] and [{κ-N(PPhSe)}Ti(NMe)] (6b) and two dinuclear titanium(IV) complexes, [CH{(NPhPS)(N)}Ti(NMe)] (3c) and [{κ-N(PPhSe)}Ti(NMe)] (6c), are reported. Dinuclear titanium(IV) complex 6c acts as an efficient catalyst for the chemoselective addition of an E-H bond (E = N, O, S, P, C) to heterocumulenes under mild conditions. The catalytic addition of aliphatic and aromatic amines, alcohol, thiol, phosphine oxide, and acetylene to the carbodiimides afforded the corresponding hydroelemented products in high yield at mild conditions with a broader substrate scope.

Role of C, S, Se and P donor ligands in copper(i) mediated C-N and C-Si bond formation reactions.

The first comparative study of C, S, Se and P donor ligands-supported copper(i) complexes for C-N and C-Si bond formation reactions are described. The syntheses and characterization of eight mononuclear copper(i) chalcogenone complexes, two polynuclear copper(i) chalcogenone complexes and one tetranuclear copper(i) phosphine complex are reported. All these new complexes were characterized by CHN analysis, FT-IR, UV-vis, multinuclear NMR and single crystal X-ray diffraction techniques.

Alkali metal complexes as efficient catalysts for hydroboration and cyanosilylation of carbonyl compounds.

We report here reactions between the N-adamantyliminopyrolyl ligand 2-(AdN[double bond, length as m-dash]CH)-C4H3NH (L-H) and alkali metal hexamethyldisilazides [MN(SiMe3)2] (M = Li, Na and K) to afford the dimeric [{2-(AdN[double bond, length as m-dash]CH)-C4H3NLi(THF)}2] (1), [{2-(AdN[double bond, length as m-dash]CH)-C4H3N}{Na(THF)1.5}2] (2) and polymeric [{2-(AdN[double bond, length as m-dash]CH)-C4H3NK(THF)}n] (3) complexes at ambient temperature. A one-pot reaction between L-H, [KN(SiMe3)2] and alkaline earth metal diiodide (AeI2) in a 2 : 2 : 1 molar ratio, which resulted in the formation of a heteroleptic Ae metal complex [κ2-{2-(AdN[double bond, length as m-dash]CH)-C4H3N}2Ae(THF)2] [Ae = Mg (4), Ca (5)], is also reported.

Recyclable Pd/CuFeO nanowires: a highly active catalyst for C-C couplings and synthesis of benzofuran derivatives.

Pd/CuFeO nanowire-catalyzed cross coupling transformations are described. Notably, these reactions showed excellent functional group tolerance. Further, the protocol is applied to a one-pot synthesis of benzofurans a Sonogashira coupling and intramolecular etherification sequence.

Multifunctional Nd substituted NaBiTiO as lead-free ceramics with enhanced luminescence, ferroelectric and energy harvesting properties.

Herein, we present comprehensive investigations of the optical and electrical properties of Nd substitution in sodium bismuth titanate ceramics (NBNT) with varying Nd concentration. The room temperature photoluminescence (PL) emission for both unpoled and poled samples is observed to be a maximum for an Nd substitution of 1 mol%. Upon poling, the PL intensity is observed to be quenched, consistent with the obtained XRD data, indicating an electric-field induced structural ordering towards higher symmetry, confirmed with the help of structural refinement.

Ring Opening Polymerization and Copolymerization of Cyclic Esters Catalyzed by Group 2 Metal Complexes Supported by Functionalized P-N Ligands.

We report the preparation of alkali and alkaline earth (Ae) metal complexes supported by 2-picolylamino-diphenylphosphane chalcogenide [(PhP(=E)NHCH(CHN)] [E = S (1-H); Se (2-H)] ligands. The treatment of the protic ligand, 1-H or 2-H, with alkali metal hexamethyldisilazides at room temperature afforded the corresponding alkali metal salts [M(THF)(PhP(=E)NCH(CHN)] [M = Li, E = S (3a), Se (3b)] and [{M(THF) (PhP(=E)NCH(CHN)}] [M = Na, E = S (4a), Se (4b); M = K, E = Se (5b)] in good yield. The homoleptic Ae metal complexes [κ-(PhP(=Se)NCH(CHN)Mg(THF)] (6b) and [κ-{(PhP(=Se)NCH(CHN)}M(THF) ] (M = Ca (7b), Sr (8b), Ba (9b)] were synthesized by the one-pot reaction of 2-H with [KN(SiMe)] and MI in a 2:2:1 molar ratio at room temperature.

Microporous Nanocomposite Enabled Microfluidic Biochip for Cardiac Biomarker Detection.

This paper demonstrates an ultrasensitive microfluidic biochip nanoengineered with microporous manganese-reduced graphene oxide nanocomposite for detection of cardiac biomarker, namely human cardiac troponin I. In this device, the troponin sensitive microfluidic electrode consisted of a thin layer of manganese-reduced graphene oxide (MnO-RGO) nanocomposite material. This nanocomposite thin layer was formed on surface of a patterned indium tin oxide substrate after modification with 3-aminopropyletriethoxysilane and was assembled with a polydimethylsiloxane-based microfluidic system.

Group 1 Capsular Polysaccharide Exportation Nanomachinary as a Plausible Antivirulence Target in the Perspective of Emerging Antimicrobial Resistance.

Bacteria evolving resistance against the action of multiple drugs and its ability to disseminate the multidrug resistance trait(s) across various strains of the same bacteria or different bacterial species impose serious threat to public health. Evolution of such multidrug resistance is due to the fact that, most of the antibiotics target bacterial survival mechanisms which exert selective pressure on the bacteria and aids them to escape from the action of antibiotics. Nonetheless, targeting bacterial virulence strategies such as bacterial surface associated polysaccharides biosynthesis and their surface accumulation mechanisms may be an attractive strategy, as they impose less selective pressure on the bacteria.