Metal–organic frameworks incorporating Cu₃(μ₃-OH) clusters

Abstract

Interaction of 4,4-bi(1,2,4-triazole) (btr) with copper(II) chloride (bromide) in aqueous or aqueous alcohol media led to a series of coordination polymers featuring the formation of mu 3-hydroxotricopper(II) clusters and their integration into 3D frameworks. These unprecedented structures originate in the propagation of trigonal hydroxotricopper(II) clusters bridged by tri- or tetradentate organic ligands. Complex [{Cu3(mu3-OH)}{Cu3(mu3-O)}(mu4-btr)3(H2O)4(OH)2Cl6]Cl.0.5H2O adopts a structure of SrSi2 topology, with eight-fold interpenetration of the coordination frameworks. The structure of [{Cu3(mu3-OH)}2(mu3-btr)6(mu4-btr)(mu-X)X4]X5.nH2O (X = Br, n = 6; X = Cl, n = 8) involves 2D coordination layers [{Cu3(mu3-OH)}(mu3-btr)3]n with an exceptional (3,6)-net topology, which are cross-linked by tetradentate btr ligands and bridging chloride (bromide) ions.

A novel copper-based MOF material: Synthesis, characterization and adsorption studies

“…While numerous Cu 4 (l 4 -O) complexes, especially halogeno bridged ones, have been reported [25][26][27][28][29], the herein presented Cu 4 (l 4 -O)(l 2 -OH) core appears to be unknown. Since the positive charge of the Cu 2+ ions is balanced by the deprotonated ligands as well as by the oxo anion and the hydroxy groups, a neutral framework is obtained.…”

Synthesis, characterization and crystal structure of a novel 2D Cu(I) complex with flexible ligand

“…Cu(1) center is coordinated in a distorted tetrahedral geometry from two L molecules and two iodine anions. The bond lengths of Cu−I range from 2.6691(8) to 2.6824(7) Å with an average value of 2.6757 Å, and the Cu−N range from 2.045(4) to 2.006(3) Å, which are similar to those transition-metal complexes of N-containing ligands [16]. For the network, pairs of L ligands using transfashions link adjacent Cu I centers with shorter Cu Fig.…”

Pillaring of CdCl2‐Like Layers in Lanthanide Metal–Organic Frameworks: Synthesis, Structure, and Photophysical Properties

“…[11] Recently, a simple (4,4) connectivity has also been discussed in terms of 3 6 topology by considering hydrogenbond interactions in [MA C H T U N G T R E N N U N G (btza) 2 A C H T U N G T R E N N U N G (H 2 O) 2 ]·2 H 2 O (M= Mn, Zn; btza: bis(1,2,4-triazol-1-yl)acetate). [12] We have been interested in the study of lanthanide compounds due to their interesting optical behavior arising from the ligand-sensitized and sharp f-f emissions.…”