Tubular metal organic frameworks from the curvature of 2D-honeycombed metal coordination

Abstract

A tubular catalyst showed fast catalytic kinetics for CO2 conversion with a TON of 2300 and a TOF of up to 173 h−1.

Photoresponsive reversible self-assembly of rod-coil amphiphiles containing spiropyran groups

“…Various PEO chains are chosen as the coil parts to impart unequal hydrophilicity and steric hindrance. 1 H nuclear magnetic resonance (NMR), 13 C NMR, and matrix-assisted laser desorption/ionization-time of flight mass measurements (MALDI-TOF-MS) for 1-4 demonstrated that the target compounds were successfully synthesized (Fig. S1-S12, ESI †).…”

“…[1][2][3][4][5][6][7][8] The elementary molecular structure and assembly environment are two crucial elements that simultaneously determine the non-covalent interactions of the assembly systems, and further influence the morphology of the aggregates and the application prospects of supramolecular soft materials. [9][10][11][12][13][14][15] Therefore, stimuli-responsive self-assembly is a convenient technique for obtaining various assembled nanostructures by modifying the assembly environment under external stimuli (e.g., light, heat, pH, or ions). [16][17][18][19][20][21][22] Among the possible kinds of stimuli-sensitive self-assembly, photo-controlled selfassembly is considered to be an ideal method to form diverse functional nanoassemblies, due to the characteristic properties of light.…”

“…13 C NMR (75 MHz; Compound 3. Yellow sticky solid (0.046 g, 0.059 mmol, yielded 23.2%), 1 H NMR (300 MHz; CDCl 3 ; Me 4 Si) d ppm: 9.84 (s, 1H), 7.67 (s, 1H), 7.64 (d, J = 2.7 Hz, 2H), 7.55-7.52 (m, 6H), 7.42 (d, J = 9.7 Hz, 1H), 7.00 (d, J = 8.8 Hz, 2H), 6.94 Scheme 1 Reaction to generate compounds 1-4.…”

Exovinylene Cyclic Carbonates: Multifaceted CO2‐Based Building Blocks for Modern Chemistry and Polymer Science

“…The specific MOF topology which embeds unsaturated metal sites and some defects, increased the CO 2 uptake and is beneficial for the activation of the propargylic alcohol via π-activation of the triple bond. The silver-metalated MOF (24) (0.5 mol% loading of Ag) used in combination with PPh 3 (2.5 mol%) delivers quantitatively DMACC at 50 °C and 5 bar of CO 2 in 20 h. [78,79] More recent reports describe the design of Agmetalated tubular porous MOF distinguished by a curved 2D π-conjugated honeycombed metal framework with a dense distribution of Ag cations at the tube surface (25) [80] and organosulfonated 3D frameworks with cubic topology for dual CO 2 capture/activation and Ag metalation (26). [81,82] All MOF catalysts (0.1 to 10 mol% Ag loading) are mixed systems using 10 to 20 mol% of DBU to provide DMACC in excellent yields (90-99 %) within 1 to 24 h at 1 bar CO 2 pressure and 25-40 °C.…”

“…[79]; 25 is adapted from ref. [80] with permission from the Royal Society of Chemistry, Copyright 2020; 26 is reproduced from ref. [82] with permission from the American Chemical Society, Copyright 2020; 27 is reproduced from ref.…”