This disclosure provides compositions of SALTAME core containing compounds and associated methods for use in tracking cells by magnetic resonance imaging (MRI), computed tomography (CT), positron emission tomography (PET), and related methods.

Molybdenum(IV) and molybdenum(III) coordination complexes are described. Methods for depositing molybdenum-containing films on a substrate are described. The substrate is exposed to a molybdenum precursor and a reactant to form the molybdenum-containing film (e.g., elemental molybdenum, molybdenum oxide, molybdenum carbide, molybdenum silicide, molybdenum nitride). The exposures can be sequential or simultaneous.

A compound that is useful for forming a metal by reaction with a reducing agent is described by formula (I): ##STR00001##
wherein M is a metal selected from Groups 2 through 12 of the Periodic Table; and R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each independently H or C.sub.1-C.sub.8 alkyl.

Provided are methods of carbonylating cyclic substrates to produce carbonylated cyclic products. The cyclic substrates may be 2, 2-di substituted epoxides and the cyclic products may be β,β-di substituted lactones. The method may be carried out by forming and pressurizing a reaction mixture of the cyclic substrate, a solvent, carbon monoxide, and a [LA.sup.+][CO(CO)4.sup.−] catalyst, where [LA.sup.+] is a Lewis acid capable of coordinating to the cyclic substrate. The method may proceed with a regio selectivity of 90:10 or greater. The resulting carbonylated cyclic products may be converted to ketone aldol products that retain the stereochemistry and enantiomeric ratio of the carbonylated cyclic products.

Compounds can be used as catalysts, particularly in ring-opening polymerization reactions, including ring-opening co-polymerization (ROCOP) reactions, or in isocyanate trimerization reactions. The compounds have the formula L-M-X.sub.n, where L is a pyridyl-bis(iminophenolate) ligand, M is a metal ion, X is a co-ligand to balance the charge of the compound, and n is an integer from 0 to 7. The compounds can be prepared by base condensation of a pyridyl-diamine compound with an aldehyde or ketone.

Disclosed herein are modified chromium-dpoed zinc gallate (ZGC) nanocubes, which are characterized in respectively having a concave surface that is modified with (3-aminopropyl)triethoxysilane (APTES). The modified ZGC nanocubes produce long lasting luminescence (LLL) that lasts for at least 1.5 hours under X-ray or UV excitation. Also disclosed herein are methods for the preparation of the modified ZGC nanocubes; and methods for imaging an area of interest (e.g., cancer) in a live subject using the modified ZGC nanocubes as an imaging agent.

A strongly emissive OLED emitter which is a tungsten (VI) complex showing thermally activated delay fluorescence or phosphorescence behavior and a di-hydroxy Schiff base tetradentate ligand for the preparation of the OLED emitter are provided. The synthesis of the tetradentate ligand and tungsten (VI) complex is illustrated. The OLED emitter can be used to fabricate OLED devices.

Methods for the synthesis of a polyoxometalate compounds include heating a metal precursor in the presence of an organic salt. The polyoxometalate compounds produced herein display high photoluminescence quantum yields and photoluminescence maximums in the blue and/or violet regions of the electromagnetic spectrum.

The invention relates to a process for the carbonylation of epoxides in the presence of catalyst systems, in which the carbonylation is carried out in the presence of carbon monoxide, and wherein the catalyst system comprises a vanadium-based, chromium-based, manganese-based and/or tungsten-based compound, preferably a tungsten-based compound. The invention further relates to carbonylation products and carbonylation conversion products and to the use of catalyst systems according to the invention for carbonylation of epoxides.

The invention relates to oligomerization of olefins, such as ethylene, to higher olefins, such as a mixture of 1-hexene and 1-octene, using a catalyst system that comprises a) a source of chromium b) one or more activators and c) a phosphacycle-containing ligating compound. Additionally, the invention relates to a phosphacycle-containing ligating compound and a process for making said compound.