Structural studies and conductivity of [Fe(O<sub>3</sub>C<sub>4</sub>)(COO)]·H<sub>2</sub>O based H<sub>4</sub>btec (H<sub>4</sub>btec = 1,2,4,5-benzenetetracarboxylic acid)

Abstract

A new metal-organic hybrid compound [Fe(O 3 C 4)(COO)]•H 2 O I has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction. Rust crystals crystallize in the monoclinic system, space group I2/a, a = 6.9651(2) Å, b = 8.12630(10) Å, c = 19.4245(2) Å, β = 92.6600(10)˚; V = 1098.25(4) Å 3 ; Z = 2 and D x = 3.63 g/cm 3. The refinement converged into R = 0.042; R w = 0.058. The structure, determined by single crystal X-ray diffraction, consists of a network of FeO 6 centers, octahedral coordinated by btec (btec = 1,2,4,5-benzenetetracarboxylic acid) anions giving rise to a two-dimensional sheet structure. In the compound I, [Fe(O 3 C 4)(COO)]•H 2 O, the FeO 6 group bridged by the 1,2,4,5-benzenetetracarboxyl anion exist in a unit cell, with each anion lying about an inversion centre. One of the FeO 2 a distance [1.965(2)] significantly corresponds to the shortest distance as the other and the distances found in the axial direction of compound I.

Preparation of MOF-Based Core-Shell Gel Particles with Catalytic Activity and Their Plugging Performance

“…Metal-organic framework (MOF) materials are a class of crystalline porous framework materials with a multidimensional periodic network structure generated by the self-assembly of metal ions or metal cluster units with organic ligands via coordination interactions [37,38]. They appear as microscopic or nanometric crystal particles with well-developed pore structures and large specific surface areas [39,40]. Based on these characteristics, MOFs have highly effective molecular sieve catalytic properties, with some containing transition metals with Lewis acid properties, equipping them with Lewis acid catalytic activity.…”