Structures and properties of gallium-MOFs with MIL-53-topology based on aliphatic linker molecules

A Flexible Photoactive Titanium Metal–Organic Framework Based on a [TiIV3(μ3‐O)(O)2(COO)6] Cluster

“…As imilar guest-induced breathing mechanism was recently reported for the MIL-53 analogue [M(OH)(cdc)] or CAU-13 (M = Al, Ga). [46][47][48] On the other hand, the breathing behavior of COK-69 is distinctly different from that of its topological analogue MIL-88B, which contains rigid terephthalate linkers. [49] Theflexibility of 6 ] cluster from MIL-88 for comparison (O red, Cblack, Cr green).…”

Synthesis, Structure, and Selected Properties of Aluminum-, Gallium-, and Indium-Based Metal-Organic Frameworks

“…Adsorption of xylenes leads to a ring inversion from a,a-to e,e-CDC 2− which causes the breathing effect. Compared to the structural changes in Al-MIL-53 (ΔV unit cell = 49%) [12], the changes for Al-and Ga-CAU-13 are much smaller (ΔV unit cell = ∼21) [94,155].…”

“…This changes the sorption properties and the breathing behavior in a gradual fashion, depending on the molar ratio of the different linker molecules. Aliphatic analogues of the MIL-53 containing a cyclohexane ring [93][94][95] (denoted CAU-13) have also been obtained. Following the approach of isoreticular chemistry, several MOFs based on extended linear linker molecules with MIL-53 topology were described ( Figure 5.4, Table 5.1,).…”

“…Type 2 breathing has only been observed in [M(OH)(CDC)] (M-CAU-13, M = Al and Ga, CDC 2− = trans-1,4-cyclohexanedicarboxylate) [94,155]. Adsorption of xylenes leads to a ring inversion from a,a-to e,e-CDC 2− which causes the breathing effect.…”

A Nonlinear Optically Active Bismuth–Camphorate Coordination Polymer

“…A well‐known strategy for engineering chiral CPs consists of using chiral ligands, whose “push‐pull” effect becomes cumulative through the multiple coordination to metal centers . In that respect, camphoric acid (or 1,2,2‐trimethylcyclopentane‐1,3‐dicarboxylic acid) seems to be a good candidate to be used as organic spacer for synthesis of CPs since it presents: (i) two complexing carboxylate groups, able to coordinate cations and form multidimensional CPs, as it has been already proven, aiming the preparation of multidimensional organic–inorganic hybrid materials; (ii) conformational rigidity due to the presence of five‐membered aliphatic ring; (iii) a relative low‐cost (produced by oxidizing the naturally occurring camphor with nitric acid), envisaging large scale synthetic approaches; (iv) an environmentally friendly character, with potential therapeutic effects (antiseptic, osteoblastic differentiation, antitumor); and (v) a chiral nature, essential to build up noncentrosymmetric materials.…”