Metal‐organic gels (MOGs) have emerged as a class of functional materials that show great potential applications in the field of catalysis, energy storage, template synthesis, and environmental technology. The construction of functional MOGs and the control of functionality are still challenging due to complicated chemicals or routes involved in previous works. Here we report a series of tunable multifunctional MOGs by directly gelating between Fe3+ and simple chemicals, propanedioic acid (H2PA), succinic acid (H2SA), glutaric acid (H2GA), and fumaric acid (H2FA) in ethanol. The obtained MOGs exhibit self‐healing property and good conductivity, and were used for high efficacy removal of arsenic (As) in water. The ease, low cost, and scalability of the assembly process combined with multifunctionality make these MOGs be potentially applied in the fields of energy storage and sewage disposal. © 2018 American Institute of Chemical Engineers AIChE J, 64: 3719–3727, 2018

Clathrate hydrates (CHs) have recently attracted considerable research interest in fundamental science and practical applications because guest molecules with special electronic properties can be selectively trapped in the hydrogen-bonded water cages, and thus such CHs could be a novel class of promising functional materials. However, information about the electronic properties of CHs containing paramagnetic guest molecules and the spin-coupling mechanisms are quite scarce. In this work, at the ab initio molecular dynamics level, we first simulate the magnetic properties and spin-coupling mechanism of the structure I-type double O 2 CHs (O 2 @CHs) derived from the experimental crystal structure. The results show that these O 2 @CHs exhibit rich diversity of spin-coupling characteristics, depending on the O 2 -occupation patterns of the nanocages and relative orientations of two O 2 , which govern the orbital overlaps between the spin carriers. O 2 @CHs presents the antiferromagnetic coupling when two guest O 2 are encapsulated in two symmetric 5 12 6 2 cages or one 5 12 6 2 cage with parallel orientations, whereas it exhibits the paramagnetic state for all other population patterns. The direct O 2 •••O 2 spin couplings operate through the diffuse parts of the O 2 orbitals in these systems. Further, the elastic strain is examined for tuning their magnetic properties, finding that spin arrangement and magnetic characteristics can reversibly convert between the antiferromagnetic [

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Although α-methylene-δ-valerolactone (MVL) as a biorenewable six membered lactone bearing an exocyclic double bond has shown great potential to prepare functional polyester with pendent modifiable vinyl group, the copolymerization of...