IMOBILIZAÇÃO DE COMPLEXO DE RUTÊNIO CONTENDO BASE DE SCHIFF NA UNIDADE METALOORGÂNICA UiO-67

Abstract

Recebido em 28/01/2018; aceito em 17/04/2018; publicado na web em 22/05/2018 IMMOBILIZATION OF RUTHENIUM SCHIFF BASE COMPLEX IN THE METAL-ORGANIC FRAMEWORK UiO-67. Zirconium-based metal-organic framework, UiO-67, was synthesized and used as support for the immobilization of the [RuCl 2 (ENAPY)] (ENAPY = N,N'-bis(7-metyl-2-pyridylmethylene)-1,2-diiminoethane)). The immobilized system exhibited violetblue color. The {UiO-67/[RuCl 2 (ENAPY)]} was characterized by cyclic voltammetry, X-ray diffraction, UV-Vis, FTIR and X-ray photoelectron spectroscopy. The electrochemistry of the immobilized system is characterized by a reversible pair of waves at +0.40 V (vs NHE), ascribed to the Ru 3+/2+ redox process. The electronic spectrum of the immobilized system is characterized by bands at 520 and 380 nm ascribed to a ligand-to-metal charge-transfer transitions {Ru 2+

Water Electrolysis Using Thin Pt and RuOx Catalysts Deposited by a Flame-Annealing Method on Pencil-Lead Graphite-Rod Electrodes

“…In Pt/PGR, peaks of Pt 5p; 52 eV, 4f 7/2 ; 71 eV, 4f 5/2 ; 74 eV, 4d 5/2 ; 315, 4d 3/2 ; 332 eV, and 4p 3/2 ; 520 eV are shown in Figure a–c. These Pt peaks were considered to be zero-valent metal that is not bonded to other elements. , In addition, the C 1s peak decreased (Figure d), which is due to the Pt covering on the PGR surface. − Similarly, the O 1s peak of Pt/PGR also decreased (Figure e). Because no conspicuous shift of the oxygen peak was observed, it was considered that Pt was not bonded with oxygen (Figure e).…”