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Alkali Cation Effects On Redox-Active Formazanate Ligands In Iron Chemistry, Daniel L J Broere, Brandon Q. Mercado, Eckhard Bill, Kyle M. Lancaster, Stephen Sproules, Patrick L. Holland

Daniel Broere

Non-covalent interactions of organic moieties with Lewis acidic alkali cations can greatly affect

structure and reactivity. Herein, we describe the effects of interactions with alkali metal cations

within a series of reduced iron complexes bearing a redox-active formazanate ligand, in terms

of structures, magnetism, spectroscopy, and reaction rates. In the absence of a crown ether to

sequester the alkali cation, dimeric complexes are isolated wherein the formazanate has

rearranged to form a five-membered metallacycle. The dissociation of these dimers is

dependent on the binding mode and size of the alkali cation. In the dimers, the formazanate

ligands are radical dianions, …

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Supplemental Information: Alkali Cation Effects On Redox-Active Formazanate Ligands In Iron Chemistry, Daniel L J Broere

Daniel Broere

No abstract provided.

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Hyperpolarized Porous Silicon Nanoparticles: Potential Theragnostic Material For 29si Magnetic Resonance Imaging, Hyeonglim Seo, Ikjang Choi, Nicholas Whiting, Jingzhe Hu, Quy S. Luu, Shivanand Pudakalakatti, Caitlin Mccowan, Yaewon Kim, Niki Zacharias Millward, Seunghyun Lee, Pratip Bhattacharya, Youngbok Lee

Nicholas Whiting

Porous silicon nanoparticles have recently garnered attention as potentially-promising biomedical platforms for drug delivery and medical diagnostics. Here, we demonstrate porous silicon nanoparticles as contrast agents for 29Si magnetic resonance imaging. Size-controlled porous silicon nanoparticles were synthesized by magnesiothermic reduction of silica nanoparticles and were surface activated for further functionalization. Particles were hyperpolarized via dynamic nuclear polarization to enhance their 29Si MR signals; the particles demonstrated long 29Si spin-lattice relaxation (T1) times (~25 mins), which suggests potential applicability for medical imaging. Furthermore, 29Si hyperpolarization levels were sufficient to allow 29Si MRI in phantoms. These results underscore the potential of porous …

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Sure Poster 2018, Stephanie Armas, Cody Autrey, Enrique J. Blanco Martinez, Jared Church, Swadeshmukul Santra, Woo Hyoung Lee, Karin Y. Chumbimuni-Torres

Cody Autrey

Huanglongbing (HLB), more commonly known as citrus greening disease (CGD), is an insect-borne bacterial disease affecting citrus crops worldwide. CGD symptoms can be visually seen throughout the plant, displaying yellowing veins, asymmetrical chlorosis and blotchy leaves, leading to underdeveloped fruit with green colored and stained seeds. The mottling discoloration has been linked to zinc deficiency in the plant, thus monitoring varying zinc levels is our main concern. Well established tools for plant analysis such as Atomic Absorption Spectroscopy (AAS), X-Ray Fluorescence, among other methods are costly, non-portable and destructive. Here, we have developed and characterized two solid contact micro-ion-selective …

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Full-Text Articles in Chemistry

Alkali Cation Effects On Redox-Active Formazanate Ligands In Iron Chemistry, Daniel L J Broere, Brandon Q. Mercado, Eckhard Bill, Kyle M. Lancaster, Stephen Sproules, Patrick L. Holland

Daniel Broere

Supplemental Information: Alkali Cation Effects On Redox-Active Formazanate Ligands In Iron Chemistry, Daniel L J Broere

Daniel Broere

Nicholas Whiting

Sure Poster 2018, Stephanie Armas, Cody Autrey, Enrique J. Blanco Martinez, Jared Church, Swadeshmukul Santra, Woo Hyoung Lee, Karin Y. Chumbimuni-Torres

Cody Autrey