Response calculations of electronic and vibrational transitions in molecular oxygen induced by interaction with noble gases

Neutrophils Generate Microparticles during Exposure to Inert Gases Due to Cytoskeletal Oxidative Stress

“…Inert gases enhance the rate of reactive O 2 species (ROS) production by forming collision complexes (15)(16)(17)(18). This occurs because of a transient shift of electron density from the collider molecular orbitals into the orbitals of O 2 (15,16). These gases can elicit oxidative stress responses in unicellular organisms and enhance O 2 toxicity in whole animals under some conditions (19 -23).…”

Photochemistry and Spectroscopy of Singlet Oxygen in Solvents. Recent Advances which Support the Old Theory

“…From our previous calculations it follows that the oxygen and solvent vibrations both can participate in the electronic energy transfer to solvent vibrations upon the nonradiative transition [53]. They both can promote an effective mixing of initial and final states with chargetransfer configurations (Fig.…”

“…Ogilby et al [37] have cited Lviv Polytechnic National University Institutional Repository http://ena.lp.edu.ua the review [3], where the CT mechanism of SOC enhancement [43] ) energy transfer to solvent vibrations we need to consider first the mechanism of cooperative transitions appearance in singlet oxygen emission [55,56]. A very weak band shifted from 1.27 μm to the long-wave region by the frequency of CCl vibration (760 cm -1 ) in the R 3 C-Cl solvents was observed by Chou and Khan [56] and was interpreted as a simultaneous transition in both O 2 and solvent molecules: the Calculations [45,[51][52][53][54] show that the CT states are strongly attractive until the equilibrium intermolecular distance R e (CT) ≈ 2.9 Å. This distance is not such long in comparison with equilibrium separation R e (X) .= 3.5 Å in the low-lying singlet and triplet states M…O 2 .…”

“…This distance is not such long in comparison with equilibrium separation R e (X) .= 3.5 Å in the low-lying singlet and triplet states M…O 2 . The lowlying states intermolecular potentials have very shallow minima around R e (X) distance [51], but they can exist during the collision complex lifetime since the intermolecular vibrational quanta are inside the dissociation energy gap [53]. The collision complex model (Fig.…”

A theoretical and experimental study of pressure broadening of the oxygen A-band by helium

“…The extinction of light by atmospheric oxygen in the A-band region is understood to originate from (i) Rayleigh scattering, the elastic scattering of light on subwavelength particles (ii) collision induced absorption (CIA) [3][4][5], the absorption of light by a transient electric dipole moment, and (iii) magnetic dipole absorption [6]. Much effort has been invested to quantify the contribution of these mechanisms experimentally [7][8][9].…”