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Tags: Inorganic Seminar

Gas storage and separations are vitally important to many areas of society. Though perhaps easy to appreciate the utility of storing gasses, separating one from another is just as significant. In fact, such processes are conservatively responsible for up to hundreds of billions of dollars of global commerce each year. Significant separations include isolating O2 and noble gasses from air, as well as isolating short chain hydrocarbons from one…
Solid-state batteries offer the promise of improved energy density and safety compared to lithium-ion batteries, but degradation of materials and interfaces can play an outsized role in limiting their performance. Here, I will present our emerging understanding of the key differences between how high-capacity anode materials behave in solid-state batteries compared to in conventional liquid-electrolyte batteries. The electro-chemo-mechanical…
As our global population continues to grow and demand more resources, development of more advanced methods of chemical production and catalysis in an efficient manner are paramount. One such route to advancing catalysis in transition metal chemistry is to utilize not only abundant, inexpensive first-row transition metals, but also utilize more complex means of controlling chemistry around these metal centers. One of the principal challenges to…
In combating the global warming crisis, there is a particular interest in mitigating fossil fuel use as it remains a significant source of anthropogenic CO2 emissions. One solution for reducing fossil fuel emissions is the development of alternative fuel sources that are clean and renewable such as hydrogen gas (H2). Natural systems have evolved efficient machinery utilizing cheap, earth-abundant metals that can provide sources of alternative…
Ribonucleotide reductases (RNRs) catalyze de novo biosynthesis of deoxynucleotides in almost all organisms that use DNA as their genetic material. They are current drug targets for both cancer and infectious diseases. All RNRs share a common catalytic mechanism initiated by a cysteinyl radical, while the radical generation varies greatly and provides the biochemical basis dividing the RNRs into the three major classes and several subclasses. All…
Methanotrophs produce methanobactin (Mbn), a copper-chelating peptide, when copper levels in the environment are low.1,2 These methanotrophs utilize the copper-dependent enzyme methane monooxygenase to oxidize methane, which is the methanotrophs only carbon source. Mbn has a high affinity for copper and chelates Cu(I) directly, or indirectly utilizes Cu(II) by conversion to Cu(I) through an unknown reductive process.2,3 Mbn is an example of…
Two-dimensional materials remain one of the hottest research fields for a few decades due to their emerging physical properties existing in a single atomic layer or a few atomic layers. After intensive research efforts, 2D materials started to find their applications in our daily life, such as in batteries, electronics, or even bulletproof vests. To turn on the functionalities of 2D materials, controlled synthesis of 2D materials is…
Radical S-adenosyl-L-methionine (SAM) enzymes form a large superfamily with >700,000 unique gene sequences. These enzymes catalyze reductive cleavage of SAM to generate a highly reactive 5′-deoxyladenosyl radical and catalyze otherwise chemically challenging radical reactions. While a large number of reactions have been reported to be catalyzed by these enzymes, the molecular details of the mechanisms by which these enzymes control the…
Members belonging to non-heme iron and 2-oxoglutarate (Fe/2OG) dependent enzymes are characterized by a cupin-fold structural feature and the use of a potent iron-oxo species to initiate the reaction. Fe/2OG enzymes are known to catalyze a wide variety of oxidative transformations including hydroxylation, halogenation, etc.  To date, an overwhelming number of genes (> 160,000) present in sequenced genomes are annotated as Fe/2OG enzymes…

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