Isoreticular chemistry of scandium analogues of the multicomponent metal–organic framework MIL-142

Abstract

MIL-142(Sc) is prepared and the limits of the isoreticular substitution of each linker type are explored and characterised by single-crystal XRD.

Sc(iii)-Based metal–organic frameworks

“…Prasad et al (2020) 73 synthesized the MIL-142 members with planar dicarboxylate (H 2 BDC, NH 2 -BDC, or NO 2 -BDC) and planar tricarboxylate (TATB, or 4,4′,4″-(pyridine-2,4,6-triyl)tribenzoate, PTB) via solvothermal reactions (Fig. 30).…”

“…44 The comparatively reduced activity of MIL142(Sc)-TATB was due to the restricted access resulting from the full 2-fold interpenetration of the framework. 73…”

“…44 The comparatively reduced activity of MIL142(Sc)-TATB was due to the restricted access resulting from the full 2-fold interpenetration of the framework. 73 The incorporation of secondary metal ions in MOFs offers excellent prospects regarding desired applications, especially in gas capture and catalysis, as it provides better tailoring of structure and functionality. Recently, bimetallic combinations of gold-scandium 74 and silver-scandium 75 have been explored as novel catalytic systems for the production of high-value compounds with excellent regioselectivity/diastereoselectivity.…”

“…Moreover, using affordable secondary metal ions as metal centres in Sc-MOFs is equally beneficial in lowering the MOF production cost. Likewise, constructing Sc-MOFs with binary linkers (especially with terephthalate and analogues) could be a cost-cutting 73…”

Design of Metal-Organic Polymers MIL-53(M3+): Preparation and Characterization of MIL-53(Fe) and Graphene Oxide Composite

“…Knowing the magnitude of electronegativity and the size of the M ions makes it possible to search for new compounds with a specific composition and structure or to explain the unreality of their preparation, including the conversion of MIL-53(M 3+ ) into another type of MOF or the production of non-single-phase samples subject to the synthesis conditions (Table 1). Thus, phases with M 3+ = V (r V VI = 0.64Å, χ V = 1.53) [13], Sc (r Sc VI = 0.745Å, χ Sc = 1.19) [14], and In (r In VI = 0.8Å, χ In = 1.66) [15], and are obtained by the hydrothermal method under different conditions (temperature, duration of the process) and synthesis than those presented in Table 1 which crystallize in other types of structures.…”