Charles B. Harris

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Extensive chemical, spectrophotometric, and x-ray structural studies have shown that trivalent rhenium is strongly homophilic-that is, it tends to form bonds to other Re(111) atoms-and it forms at least three different series of [ReX(4)](n)(n-) complexes. The mononuclear, square complex, [ReBr(4)](-), adds two water molecules to give(More)
OBJECTIVE To answer the question 'does TNF blockade therapy enable people with severe AS to return to work or work more productively?'. METHODS All patients with AS currently receiving anti-TNF therapy at two UK Hospitals were asked to complete a questionnaire. This asked about occupational history, type of work, degree of job-related physical activity,(More)
The rise of inorganic-biological hybrid organisms for solar-to-chemical production has spurred mechanistic investigations into the dynamics of the biotic-abiotic interface to drive the development of next-generation systems. The model system, Moorella thermoacetica-cadmium sulfide (CdS), combines an inorganic semiconductor nanoparticle light harvester with(More)
Many properties of chemical reactions are determined by the transition state connecting reactant and product, yet it is difficult to directly obtain any information about these short-lived structures in liquids. We show that two-dimensional infrared (2D-IR) spectroscopy can provide direct information about transition states by tracking the transformation of(More)
The ultrafast dynamics of the dissociation of M(CO)6 (M ) Cr, W, Mo) in alkane solutions were studied by femtosecond IR spectroscopy. After UV photolysis at 295 nm, both the bleach of the parent molecules and the absorption of the pentacarbonyl intermediate were probed with 240 fs time resolution. Oscillatory perturbed free induction decay signals before t(More)
We report the femtosecond transient absorption spectra of the CHJ photoproduct of the methylene iodide (CH&) photodissociation. The results indicate a disappearance of this photofragment on a z 350 fs time scale in several different solvents. The implication is that in these simple liquids, methylene iodide is undergoing geminate recombination.(More)
The reactivity of triplet 16-electron organometallic species has been studied in room-temperature solution using femtosecond UV pump IR probe spectroscopy. Specifically, the Si-H bond-activation reaction of photogenerated triplet Fe(CO)(4) and triplet CpCo(CO) with triethylsilane has been characterized and compared to the known singlet species CpRh(CO). The(More)
We demonstrate the capability of temperature-dependent 2D-IR to characterize sources of vibrational population transfer. In a model system of iron diene tricarbonyl "piano stool" complexes, this approach reveals symmetry breaking associated with equilibrium fluctuations and differentiates these from fluxional rearrangement. Tricarbonyl(1,3-butadiene)iron(More)
The vibrational relaxation dynamics following the dissociation of CrO from M ( CO) 6 ( M = Cr, MO, W) have been studied with picosecond transient absorption spectroscopy. After dissociation of C=O, the pentacarbonyl species forms a complex with a solvent molecule. The cooling of these solvated pentacarbonyl complexes was monitored from 1 ps to 1 ns and(More)