Binding of anions of great environmental concern such as SO(4)(2-), PO(4)(3-), AsO(4)(3-), HgCl(4)(2-), and CrO(4)(2-) by the protonated forms of a tren-like (tren = tris(2-aminoethyl)amine) ligand (HL) functionalized with a pyrimidine residue was studied by means of potentiometric measurements and isothermal titration calorimetry (ITC) affording log K, ΔH°, and TΔS° values for the formation of the relevant complexes. The complexes show high to very high stability due to the particular topology and electronic properties of the ligand which is able to use two separated coordination environments to host the anions, the protonated tren site where electrostatic and hydrogen bond interactions are operating, and the pyrimidine ring which may act via anion-π interaction. A contribution of -8.9 ± 0.4 kJ/mol for pyrimidine-anion interaction in water was derived for SO(4)(2-) binding. The crystal structures of [H(3)L(HgCl(4))]·H(2)O (1), [H(3)L(HgBr(4))]·H(2)O (2), and that previously reported for [H(3)L(CdI(4))], clearly show these binding features in the solid state. A hybrid AC-HL material obtained by adsorption of HL on commercial activated carbon (AC) was used to study the removal of these anions from water. AC-HL shows enhanced adsorption capacity toward all the anions studied with respect to AC. This behavior is ascribed to the stronger interaction of anions with the HL function of AC-HL than with the Cπ-H(3)O(+) sites of the unfunctionalized AC.

No abstract

No abstract

Technological developments have taken place in many areas since the occurrence of industrial revolution. The technological developments have entered the digitalization path with the industry 4.0 and have taken the potential of firms in terms of volume and diversity in response to unexpected and sudden changes in demand and markets as well as efficiency and increase the competitiveness and technological advancements in the process of supplying them and accelerated the digitalization process. With all this, it has highlighted the structure of the digital supply chain agility (ADSC), which is a means of competitiveness in today's dynamic and turbulent business environment within the supply chain. At this stage, logistics companies have sought to integrate digital technologies, smart systems, internet, robots and mobile applications into the supply chain, thus aiming to achieve higher agility. Firms aim to improve their processes and to keep customer satisfaction high, to maintain their profitability and to survive in the competitive market. The aim of this study is to increase the ability to respond to the changing and developing market and market conditions and to include the best logistics company which can fulfill the demands and requirements of a company that is trying to comply with Industry 4.0 requirements. Intuitionistic fuzzy TOPSIS method is employed to select the most appropriate logistic company.