Pyrogallate‐Based Metal‐Organic Framework with a Two‐Dimensional Secondary Building Unit

Abstract

We report a metal-organic framework (MOF) with a rare two-dimensional (2D) secondary building unit (SBU). The SBU comprises mixed-valent Fe 2 + and Fe 3 + metal ions bridged by oxygen atoms pertaining to the polytopic ligand 3,3',4,4',5,5'-hexahydroxybiphenyl, which also define the iron-oxide 2D layers. Overall, the anionic framework exhibits rare topology and evidences strong electronic communication between the mixedvalence iron sites. These results highlight the importance of dimensionality control of MOF SBUs for discovering new topologies in reticular chemistry, and especially for improving electronic communication within the MOF skeleton.

An anthraquinone-based bismuth–iron metal–organic framework as an efficient photoanode in photoelectrochemical cells

“…Bismuth atoms, with coordination number eight, are arranged forming [Bi 2 (OH) 2 (H 2 O) 2 (–SO 3 ) 2 ] dimeric units, which are further linked together through six bridging sulfonate groups ( Fig. 1a ), creating two-dimensional layered inorganic secondary building units, 24 which are pillared by the anthraquinone molecules ( Fig. 1b ).…”

Beyond the Conventional Limitation of Photocycloaddition Reaction in the Roomy Nanospace of a Metal–Organic Framework

“…To extend the scope of limitation in d CC for [2+2] photocycloadditions, we focused on metal–organic frameworks (MOFs), which are flexible crystalline porous frameworks, as the platforms for solid-phase reactions. , Because MOFs are constructed by the self-assembly of metal ions and organic ligands, appropriate combinations of the components can rationally align molecules. − Furthermore, utilization of the MOF nanospace enabled specific catalytic, , photodimerization, ,,, and polymerization reactions that cannot proceed in either bulk solids or solutions. Structural flexibility also characterizes MOFs. − Flexible MOFs undergo structural phase transitions under external stimuli, giving rise to unique properties, such as gate-opening molecular adsorption and negative gas adsorption .…”

A New Family of Layered Metal‐Organic Semiconductors: Cu/V‐Organophosphonates

“…Recently our group and Dincȃ's group reported two new 3D semiconductive MOFs with layered SBUs. [21,22] To better understand the role of layered SBUs in semiconductive MOFs and potentially use them as isolated layers of semiconductors or use them to create isoreticular semiconductive MOFs in the future, we have decided to design and synthesize an isolated layeredsemiconductive SBU that could be potentially used as a precursor to synthesize semiconductive MOFs with layered SBUs in the future. Therefore, we fully characterize the properties of isolated layered SBUs in this work.…”