Publications by authors named "Charles James Titus"
Surface chemistry of materials that host quantum bits such as diamond is an important avenue of exploration as quantum computation and quantum sensing platforms mature. Interfacing diamond in general and nanoscale diamond (ND) in particular with silica is a potential route to integrate room temperature quantum bits into photonic devices, fiber optics, cells, or tissues with flexible functionalization chemistry. While silica growth on ND cores has been used successfully for quantum sensing and biolabeling, the surface mechanism to initiate growth was unknown.
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- - The study focuses on high-valent iron species, particularly the characterization of iron complexes with the tris-skatylmethylphosphonium (TSMP) scorpionate ligand, which have potential significance in catalytic oxidation reactions.
- - Researchers explore the redox chemistry of the bis-ligated iron complex [(TSMP)Fe], demonstrating its transformation to the octahedral form and a thermally induced spin-cross-over, using advanced techniques like SQUID and nuclear magnetic resonance spectroscopy.
- - Findings indicate that the iron complex can be reversibly oxidized to a stable high-valent form, providing insights into its electronic properties and contributing to the broader understanding of octahedral Fe(IV) complexes in chemistry.
Bromination of high-pressure, high-temperature (HPHT) nanodiamond (ND) surfaces has not been explored and can open new avenues for increased chemical reactivity and diamond lattice covalent bond formation. The large bond dissociation energy of the diamond lattice-oxygen bond is a challenge that prevents new bonds from forming, and most researchers simply use oxygen-terminated NDs (alcohols and acids) as reactive species. In this work, we transformed a tertiary-alcohol-rich ND surface to an amine surface with ∼50% surface coverage and was limited by the initial rate of bromination.
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