Covalent organic frameworks (COFs) are crystalline polymers with tunable structures. Here, a COF is prepared using building units highly flexible tetrahedral sp 3 nitrogens. This flexibility gives rise to structural changes which generate mesopores capable of confining very small (<2 nm sized) non‐noble‐metal‐based nanoparticles (NPs). nanocomposite shows exceptional activity toward the oxygen‐evolution reaction from alkaline water an overpotential 258 mV at current density 10 mA cm −2 ....

COFs represent a class of polymers with designable crystalline structures capable interacting active metal nanoparticles to form excellent heterogeneous catalysts. Many valuable ligands/monomers employed in making coordination/organic are prepared via Heck and C-C couplings. Here, we report an amphiphilic triazine COF the facile single-step loading Pd0 into it. An 18–20% nano-Pd gives highly composite working open air at low concentrations (Conc. Pd(0) <0.05 mol%, average TON 1500)...

Chemical resistant coatings and hydrophobic paper textile composites using super-hydrophobic COF with high surface roughness.

This article explains the need for energy-efficient large-scale CO₂ capture and briefly mentions requirements optimal solid sorbents this application.

Employing a flexible phosphoramide ligand L, PhPO(NH3Py)2 (3Py = 3-pyridyl), four new Cu(II) cationic coordination assemblies 1, 1a, 2, and 3 of composition {[Cu2L4(H2O)2]·(ClO4)4·(H2O)5·(CH3OH)}∞, {[Cu3L6(H2O)3]·(ClO4)5·(NO3)·(H2O)11}∞, {[Cu4L8(H2O)5]·(NO3)8·L·(H2O)9}, {[Cu3L6]·(NO3)6·(H2O)8·(CH3OH)2}, respectively, were synthesized. The compounds 1 1a having perchlorate mixed perchlorate-nitrate anions, obtained as noncentrosymmetric 1D-helical assemblies. However, 2 discrete...

Abstract Pyridinol, a coordinating zwitter-ionic species serves as stoichiometrically loadable and non-leachable proton carrier. The partial replacement of the pyridinol by stronger hydrogen bonding, guest, ethylene glycol (EG), offers 1000-fold enhancement in conductivity (10 −6 to 10 −3 Scm −1 ) with record low activation energy (0.11 eV). Atomic modeling coupled 13 C-SSNMR provides insights into potential conduction pathway functionalized post-synthetically anchored dynamic transporting...

Developing metal–organic framework (MOF)‐based proton‐conducting electrolytes for fuel‐cell applications is an important target that has drawn a lot of attention. A key approach involves the selective replacement guest species within pores to enhance performance. The modular and crystalline nature MOF permits controlled introduction such characterization their compositions with high precision, task which very difficult achieve in amorphous polymers. Herein, we partially replaced protons...

Abstract The identification of a new class luminogens based on pyrrolo‐quinoxaline embedded coumarin (PQC) structures is reported. reaction relies the gold‐catalyzed hydroarylation appropriately substituted aryl alkynoates that produces molecules exhibit solvatochromism and aggregation‐induced emission enhancement (AIEE) phenomena. application PQCs for live cell imaging has also been demonstrated.

A practically nonconducting triazine-phenol polymer with high surface-hydrophobicity is transformed into a proton conducting electrolyte by tunable Li+ loading. The hydration tendency of the enables retention residual waters assisting conductivities as 1.63 × 10−3 S cm−1 even at 150 ºC. crucial role water rationalized comparing in D2O and H2O. As service to our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may be re-organized...

Confinement of the salt [NEt₄][TFSI] in metal–organic frameworks leads to a significant enhancement ionic conductivity, pointing toward novel method creating solid ion conductors.

Understanding the chemical characteristics of kidney stones and how stone composition affects their fragmentation is key to improving clinical laser lithotripsy. During lithotripsy, two mechanisms may be responsible for fragmentation: a photothermal mechanism and/or microexplosion mechanism. Herein, we carry out an isotopic substitution crystal H2O with D2O in calcium oxalate monohydrate struvite alter optical properties study relationship between absorption stones, at wavelength Ho:YAG...

Varying the degree of ethylene oxide (EO) functionalization zirconium MOF UiO-68 affords two novel MOFs; UiO-68-EO and UiO-68-2EO exhibit solvent-free ionic conductivity upon loading LiTFSI in their pores. Incorporating EO chains provides a pathway for lithium ion migration between coordinated sites results an 3.8 × 10-7 S cm-1 3.9 10-4 at 90 °C UiO-68-EO/LiTFSI UiO-68-2EO/LiTFSI respectively.

Experiments were conducted to select suitable plant-based bioadsorbents for the reduction of electrical conductivity (EC) bore well water (EC 2.20 dS m−1). Twenty-seven tested against salt reduction. Amla leaves, amla stem, prosopis calotropis flower and neem bark efficient in reducing EC from 1.89 1.77, 1.73, 1.69, 1.68 1.63 m−1 respectively. Among all, powder at 0.05% concentration was superior content (0.39 168 hours saturation time). The successfully used an azolla multiplication tank...

Exposure to arsenic (As) contaminated groundwater may be lethal human health, paving the way develop remediation strategies. This study aims at assessing efficiency of pectin stabilised nano zero valent iron particles (P-NZVI) in removal through batch and column experiments. Results from experiment reveals that, As (III) P-NZVI is directly proportional contact time, quantity with decreasing pH aqueous solution. Complete (2 ppm) was achieved 10 minutes mass concentration 0.5 g L−1 4.0 under...

Abstract Easily accessible pyrrolo‐quinoxaline embedded coumarins (PQC) represent a new class of fluorescent substances.

The inclusion of salts within the pores metal–organic frameworks (MOFs) has been shown to increase ionic conductivities salt ions relative that bulk salt, raising possibility salt/MOF composites could be used as solid electrolytes. present study explores mechanism by which liquids (ILs) occurs in MOFs and mass loadings can achieved. Simulated annealing simulations cyclic differential scanning calorimetry (DSC) experiments are investigate loading tetraethylammonium...