Publications by authors named "G Worth"
We report nonadiabatic dynamics computations on CH initiated on a coherent superposition of the five lowest cationic states, employing the Quantum Ehrenfest method. In addition to the totally symmetric carbon-carbon double bond stretch and carbon-hydrogen stretches, we see that the three non-totally symmetric modes become stimulated; torsion and three different CH stretching patterns. Thus, a coherent superposition of states, of the type involved in an attochemistry experiment, leads to the stimulation of specific non-totally symmetric motions.
View Article and Find Full Text PDFNitroaromatic compounds are found in brown carbon aerosols emitted to the Earth's atmosphere by biomass burning, and are important organic chromophores for the absorption of solar radiation. Here, transient absorption spectroscopy spanning 100 fs-8 μs is used to explore the pH-dependent photochemical pathways for aqueous solutions of -nitrophenol, chosen as a representative nitroaromatic compound. Broadband ultrafast UV-visible and infrared probes are used to characterize the excited states and intermediate species involved in the multistep photochemistry, and to determine their lifetimes under different pH conditions.
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- A study was conducted to understand the treatment preferences of patients with relapsed/refractory follicular lymphoma (FL) and the physicians treating them, with a focus on trade-offs between efficacy, tolerability, and administration.
- An online survey involving 200 patients and 151 physicians highlighted that while both valued progression-free survival (PFS), patients prioritized ease of treatment administration significantly more than physicians.
- Results showed patients preferred oral medications and were willing to accept lower PFS for the convenience of oral treatment, whereas physicians placed more emphasis on managing severe side effects like cytokine release syndrome (CRS).
Article Synopsis
- Thiophene is studied as a key example of excited state photophysics relevant to organic electronics, utilizing multiphoton ionization photoelectron imaging.
- The research investigates the transitions from the ground state to the first two excited singlet states by analyzing photoelectron spectra and angular distributions.
- The study confirms the ionization energies: 8.8 eV (adiabatic) and 9.6 eV (vertical) for the ground state, and 3.7 eV (adiabatic) and 4.4 eV (vertical) for the first two excited states.
Article Synopsis
- The study investigates the ultraviolet absorption spectrum of thiophene using advanced quantum dynamics simulations integrated with a vibronic coupling model.
- The results show strong agreement with experimental data, providing explanations for previously misunderstood spectral features through the interactions of vibrations and coupling between states.
- Analysis reveals that population transfer between states occurs rapidly in less than 100 femtoseconds, while more complex reactions like ring-opening happen over longer timescales, offering a foundation for future research on thiophene's photo-excited dynamics.