Methods of preparing and using a metal-organic framework (MOF) are provided herein, including methods of using an MOF comprising a repeat unit of the formula [ML].sub.n, wherein M is a divalent metal ion and L is a ligand of the formula: ##STR00001##
The MOFs provided herein may be used in the separation of two or more molecules from each other. In some embodiments, the molecules are ethylene and ethane. In some embodiments, UTSA-280 may be synthesized from calcium oxide (CaO) or calcium hydroxide (Ca(OH).sub.2) and squaric acid (SA) through mechanochemical synthesis.

The present invention relates to methods of manufacturing multiple metal propionates in a single reaction using sodium hydroxide as initiator and propionic acid as solvent. The method provides up to 95% conversion with greater than 60% yield. In addition, the method significantly reduces the cost or production by shortening reaction time, eliminating secondary mixing process, and providing simultaneous drying and micronization steps.

Compositions for manufacturing a thin film are provided. The compositions may include a compound having a structure of Chemical Formula 1:

##STR00001##

M may be strontium (Sr) or barium (Ba), X.sub.1 and X.sub.2 may each independently be oxygen (O) or a substituted or unsubstituted alkylamino group having 1 to 5 carbon atoms, R.sub.1 and R.sub.2 may each independently be a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms or a substituted or unsubstituted perfluoro alkyl group having 1 to 5 carbon atoms, R.sub.3 may be hydrogen or a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms, L may be a substituted or unsubstituted polyether having 1 to 6 oxygen atoms, or a substituted or unsubstituted polyamine having 1 to 6 nitrogen atoms, or a substituted or unsubstituted polyetheramine having 1 to 6 oxygen atoms or nitrogen atoms, and n may be an integer of 1 to 6.

Complex containing betaine, transition metal and sulfate in a ratio of 1:1:1, the transition metal being coordinated with two oxygen atoms from the betaine.

It is an object of the present invention to provide a storage material for a gas such as hydrogen, carbon dioxide, methane, or acetylene (excluding nitrogen gas) comprising a metal-organic framework comprising a hydroxamic acid group as a bonding site. A metal-organic framework comprising a multivalent metal ion and a molecule comprising an unsubstituted or substituted hydroxamic acid group and one or more sites capable of being bonded to the multivalent metal ion is contained. The molecule is preferably at least one compound selected from the group consisting of compounds of formulas (I) to (III).

##STR00001##

Disclosed are a light-emitting device and a method of manufacturing the same. The light-emitting device includes: a first electrode; a second electrode facing the first electrode; an emission layer between the first electrode and the second electrode and including a quantum dot including a first ligand bonded to a surface thereof; and a charge transport layer including an inorganic nanoparticle including a second ligand bonded to a surface thereof, wherein an interface between the emission layer and the charge transport layer includes a cross-link in which the first ligand on the surface of the quantum dot and the second ligand on the surface of the inorganic nanoparticle are linked by a cross-linking agent.

An object of the present invention is to provide a novel metal-organic framework with a dicarboxylic acid having a terphenyl skeleton as an organic ligand and a gas storage method using such a metal-organic framework. A metal-organic framework comprising a carboxylate ion of formula (I) and a multivalent metal ion bonded to each other. (In formula (I), R.sup.1 and R.sup.2 each independently are a hydroxy group or an unsubstituted or substituted C1-6 alkyl group. R.sup.10 and R.sup.11 each independently are an unsubstituted or substituted C1-6 alkyl group. R.sup.20 is an unsubstituted or substituted C1-6 alkyl group. Provided that, as substituents on R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.10, R.sup.11, and R.sup.20, a carboxy group (COOH) and a carboxylate ion group (COO—) are excluded. In addition, R.sup.10 and R.sup.11 are not a methyl group at the same time.)

##STR00001##

A method to make metal-organic frameworks (MOFs) in which a first aqueous solution of a transition metal salt is mixed with a second aqueous solution of an imidazole or alkyl-substituted imidazole to yield a product solution containing MOF crystals. The MOF crystals are used to fabricate electrodes for electrochemical detection of nitro-aromatic compounds.

Embodiments describe a method of depositing an MOF, including depositing a metal solution onto a substrate, spinning the substrate sufficient to spread the metal solution, depositing an organic ligand solution onto the substrate and spinning the substrate sufficient to spread the organic ligand solution and form a MOF layer.

Provided is a zinc compound represented by the following general formula (1) or (2):

##STR00001##

in the formula (1), R.sup.1 represents an unsubstituted alkyl group having 1 to 5 carbon atoms, etc., R.sup.2 and R.sup.5 each independently represent a hydrogen atom, a fluorine atom, an unsubstituted alkyl group having 1 to 5 carbon atoms, etc., and R.sup.3 and R.sup.4 each independently represent a hydrogen atom, a fluorine atom, an unsubstituted alkyl group having 1 to 5 carbon atoms, etc.;

##STR00002##

in the formula (2), R.sup.10, R.sup.11, R.sup.14, and R.sup.15 each independently represent a hydrogen atom, a fluorine atom, an unsubstituted alkyl group having 1 to 5 carbon atoms, etc., and R.sup.9, R.sup.12, R.sup.13, and R.sup.16 each independently represent a hydrogen atom, a fluorine atom, an unsubstituted alkyl group having 1 to 5 carbon atoms, etc.