New alginic acid derivatives ester for methylene blue dye adsorption: kinetic, isotherm, thermodynamic, and mechanism study.

In this paper, the application of ester materials prepared by grafting different carbon chain lengths of diols in alginic acid (AA) by a simple, fast and efficient method for the adsorption of methylene blue (MB) is studied. The AA ester derivatives are characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), derivative thermogravimetry (DTG), scanning electron microscopy (SEM), atomic force microscopy (AFM), and Zeta potential before and after MB adsorption. This study shows a significant improvement in the adsorption capacity of MB by AA after its esterification with a Q value up to 454.

Removal of Zn(II) and Ni(II) heavy metal ions by new alginic acid-ester derivatives materials.

The present work concerns the preparation of new materials based on alginic acid (AA) and diols in a facile and efficient process by improving the adsorption properties of Zn(II) and Ni(II) metal ions on the modified AA. The materials were analysed by zeta potential, thermogravimetric analysis (TGA), derivative thermogravimetry (DTG), in addition to the Fourier Transform InfraRed spectroscopy (FTIR), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) before and after the adsorption behaviour was conducted. The results show that the esterification of AA with diols of different lengths significantly improves its adsorption efficiency of Zn(II) and Ni(II) with Q up to 200 mg/g and 185.

Structure, Dynamics, and Photophysical Properties of a Series of [Pt(NHR)]-[PtX] Complexes.

Theoretical investigations of the structural, dynamics, and photophysical properties of Magnus' green salt complex and its derivatives obtained with different substituent were carried out at different levels of theory with a particular focus on the structure and the dynamics of the complex in the ground state and the excited state. The present work illustrates the results of both the quantum mechanics formulation of the time dependent density functional theory (TDDFT) (LR-TDDFT-QM) and TDDFT based Born-Oppenheimer molecular dynamics (LR-TDDFT-BOMD) within the linear response theory. The appropriate choice of the functional within the LR-TDDFT-QM approach appears to be of major importance to get relatively satisfactory results for the photophysical properties and the absorption spectra of such type of complexes.