Fluorescence sensing of metal ions in solution using a morpholine-containing phenolic Mannich base of 1'-hydroxy-2'-acetonaphthone.

A phenolic Mannich base derived from 1'-hydroxy-2'-acetonaphthone (HAN) as a substrate and morpholine as an amine reagent was synthesized and structurally characterized. The sensing ability toward various metal ions of the s-, p- and d-block of this molecule that has the binding site for metal ions in the starting -hydroxyphenone preserved was examined. Interaction between this phenolic Mannich base and Al, Cr, Cu and Co leads to modifications of the sensing molecule's absorption spectrum.

Cellulose acetate/polyurethane blend as support matrix with high optical transparency and improved mechanical properties for photocatalyst CeO nanoparticles immobilization.

Advanced manufacturing technologies for efficient catalytic materials have triggered the rational design of catalysts as well as extensive investigation into preparative methodologies. Herein, we report the preparation of new versatile cellulose acetate/polyurethane (CA/PU) blends for efficient immobilization of CeO nanoparticles, the appropriate composition of polymer mixture being chosen after rigorous analysis (SEM, FTIR, optical, mechanical). The band gap energy for hybrid films ranged between 3.

Advances in the use of cellulose-based proton exchange membranes in fuel cell technology: A review.

Fuel cells are electrochemical, ecologically friendly appliances that transform chemical energy into electricity in a clean, simple, and effective manner. With the advancement of technology in the field of computer science, electronic downsizing, and the ongoing need for mobility, the demand for portable energy sources such as fuel cells has considerably increased. The proton exchange membrane, which is designed to be a good conductor for protons while isolating electrons to move from the anode to the cathode, imprinting them an external circuit, and thus creating electricity, is at the heart of such an energy source.

Aliphatic Polyurethane Elastomers Quaternized with Silane-Functionalized TiO Nanoparticles with UV-Shielding Features.

The design of high-performance nanocomposites with improved mechanical, thermal or optical properties compared to starting polymers has generated special interest due to their use in a wide range of targeted applications. In the present work, polymer nanocomposites composed of polyurethane elastomers based on polycaprolactone or polycaprolactone/poly(ethylene glycol) soft segments and titanium dioxide (TiO) nanoparticles as an inorganic filler were prepared and characterized. Initially, the surface of TiO nanoparticles was modified with (3-iodopropyl) trimethoxysilane as a coupling agent, and thereafter, the tertiary amine groups from polyurethane hard segments were quaternized with the silane-modified TiO nanoparticles in order to ensure covalent binding of the nanoparticles on the polymeric chains.

Cellulose-based biogenic supports, remarkably friendly biomaterials for proteins and biomolecules.

Cellulose has a long history dating back to ancient times in the evolution of humanity. It was a key material for basic needs, especially for the construction of shelters, paper making, which allowed our ancestors to perpetuate the valuable literary, philosophical or artistic works. In modern era, cellulose has acquired new dimensions of knowledge and scientific interest.