Bulky substituent and solvent-induced alternative nodes for layered Cd–isophthalate/acylhydrazone frameworks

Abstract

A series of three layered cadmium–organic frameworks containing acylhydrazone and (un)substituted isophthalates have been prepared and characterised.

Combining In Situ Techniques (XRD, IR, and 13C NMR) and Gas Adsorption Measurements Reveals CO2-Induced Structural Transitions and High CO2/CH4 Selectivity for a Flexible Metal–Organic Framework JUK-8

“…Further progress in gas-related technology could result from flexible MOFs, which are a subgroup of metal–organic frameworks that respond to external stimuli like adsorbates with considerable structural transformation. − Intrinsic flexibility improves selectivity, − considerably increases the working capacity, , enables self-accelerating CO sorption, and influences gas separation . However, examination of the transition mechanism caused by the external stimulus requires sophisticated in situ techniques, e.g ., nuclear magnetic resonance (NMR), powder X-ray diffraction (PXRD), infrared spectroscopy (IR), and others . The obtained information serves as input for the understanding–tuning–developing cycle for adjusting the crucial features of the adsorbent for advanced applications.…”

Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications

“…616 Another linear 1D chain is [Cd(tBu-iso)(pich)(DMF)]•2DMF (tBu-iso = 5-tert-butylisophthalate; pcih = 4-pyridinecarboxaldehyde isonicotinoyl hydrazine) in which adjacent chains in ABAB sequence undergo interdigitation via DMF molecules linked to metal centers. 617 Further similar 1D zigzag chains involved in interdigitation exhibit [2 + 2] cycloaddition photochemical reaction (see section 4). 618 Also, 1D ladder-like chains have been illustrated to exhibit interdigitation.…”

“…621 Similar relevant examples which involve interdigitation of 1D ladder polymers to 2D structures are [Cd 2 (tBu-ip) 2 (pcih) 2 ] and [Cd 2 (ip) 2 (pcih) 2 ], with adjoining ladders arranged in an ABAB manner. 617 Other than these, an example of 1D meso-helical nanotubular or step-ladder like polymer, [Cd 2 (ADC) 2 (bpp) 3 (H 2 O)] 2 • 8H 2 O (ADC = 1,3-adamantanedicarboxylic acid), displaying 1D to 2D interdigitated architecture with bpp as side arms (Figure 109). 622 Similarly, [Zn(L1)(bpee)] (L1 = H 2 L1 = 5-(benzyloxy)isophthalic acid) with open-ended tubular 1D structure exhibits 2D interdigitated framework controlled by hydrogen bond interactions.…”

“…Such interdigitation facilities [2 + 2] photochemical reaction between host and guest 2F-4spy molecules (discussed in section ). Another linear 1D chain is [Cd­( t Bu-iso)­(pich)­(DMF)]·2DMF ( t Bu-iso = 5- tert -butyl-isophthalate; pcih = 4-pyridinecarboxaldehyde isonicotinoyl hydrazine) in which adjacent chains in ABAB sequence undergo interdigitation via DMF molecules linked to metal centers . Further similar 1D zigzag chains involved in interdigitation exhibit [2 + 2] cycloaddition photochemical reaction (see section ).…”

Dicarboxylate‐Induced Structural Diversity of Luminescent Zn(II)/Cd(II) Metal–Organic Frameworks Based on the 2,5‐Bis(4‐pyridyl)thiazolo[5,4‐d]thiazole Ligand

“…Among the different kinds of N‐containing linkers, bipyridine and their derivatives are widely employed in the construction of versatile MOFs with promising properties . In addition, it has been reported that some MOFs were constructed from rigid dicarboxylate and functionalized bipyridine by the mixed‐ligand strategy, which have intriguing structures and excellent properties . 2,5‐Bis(4‐pyridyl)thiazolo[5,4‐ d ]thiazole (Py 2 TTz) with rigid π‐conjugated system has good luminescence property , .…”