Structure-Directing and Template Roles of Aromatic Molecules in the Self-Assembly Formation Process of 3D Holmium–Succinate MOFs

Abstract

Two new holmium-succinate frameworks have been synthesized by hydrolysis in situ of the succinylsalicylic acid under different hydrothermal conditions. Compound 1, [Ho(2)(C(4)H(4)O(4))(3)(H(2)O)(2)]·0.33(C(7)H(6)O(3)), P ̅i space group, has a novel structure composed by 1D-SBUs consisting of [HoO(9)] chains of polyhedra linked by the succinate ligands giving a 3D framework. Compound 2, [Ho(2)(C(4)H(4)O(4))(3)(H(2)O)(2)], also belonging to the P ̅i space group, has a denser structure. The role of the in-situ-generated salicylic acid on formation of both structures is studied by means of a synthesis design methodology. A topological study of the new holmium succinate compounds in comparison with the previously reported 3D holmium-succinate framework is performed here.

A luminescent Terbium-Succinate MOF thin film fabricated by electrodeposition for sensing of Cu2+ in aqueous environment

“…The signals of as-prepared Tb-SA film agree with simulated XRD pattern of previously reported Holmium Succinate MOFs[42] and tin oxide (SnO 2 , JCPDS file No. 46-1088), the conductive coating component of FTO glass.…”

“…Among them, the succinic acid (SA) presents interesting behaviors due to their conformational flexibility and coordination diversity [38], which is commonly used as the second ligands to fortify the MOF structure [39][40][41]. Previously reported Ln-succinate complexes indicated that succinic acid is an ideal ligand to forming flexible porous structure as well as being efficient energy donor [42,43], which is a promising ligand for luminescent sensing applications, but the luminescent sensing potential of Ln-succinate complex remains unexplored.…”

Preparation of nano‐ZIF‐8 in methanol with high yield

“…According to the literature, the solvent could cause thermodynamic and kinetic effects in the formation of MOFs and could work as a ligand, reaction medium, both a ligand and reaction medium, or a structure‐directing agent (SDA). These effects could be changed by adding different aromatic compounds to the reacting mixtures . Park et al suggested that structure was formed not only by using a suitable linker, but also by the support of SDA as an amide‐like solvent.…”

Reviewing Rare Earth Succinate Frameworks from the Reticular Chemistry Point of View: Structures, Nets, Catalytic and Photoluminescence Applications

“…In the case of employing succinic acid and salicylic acid as a mixed ligand system and Ho 3+ ion, 2D or 3D frameworks can be obtained depending on the synthesis conditions. For example, a 3D structure where the succinate ions play a structural role whereas a template one was determined for the salicylic acid, was firstly obtained by us .…”

“…In the case of employing succinic acid and salicylic acid as a mixed ligand system and Ho 3+ ion, 2D or 3D frameworks can be obtained depending on the synthesis conditions. For example, a 3D structure where the succinate ions play a structural role whereas a template one was determined for the salicylic acid, was firstly obtained by us . This structure could be prepared either by in situ hydrolysis of succinylsalicylic acid or by adding succinic and salicylic acids in the reaction mixture; different times and temperatures of synthesis were rigorously probed to get the desired pure phase.…”