KINETICS OF EXCITED MOLECULES: I. KETENE

Photodissociation dynamics of vibrationally excited CH2Cl2 molecules

Photodissociation of dichloromethane excited to the second C–H stretch overtone was performed by 235 nm photons that also tagged the Cl P3=2 [Cl] and spin–orbit excited Cl P1=2 [Cl ] photofragments via resonantly enhanced multiphoton ionization. The measured time-of-flight profiles together with the determined Cl /Cl branching ratio suggest fast dissociation and involvement of several upper sta...

Quenching of excited states of chlorophyll molecules in submembrane fractions of Photosystem I by exogenous quinones.

The ability of three substituted quinones, 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone (DBMIB), 2,6-dichloro-p-benzoquinone (DCBQ), and tetramethyl-p-benzoquinone (duriquinone) to quench the excited states of chlorophyll (Chl) molecules in Photosystem I (PSI) was studied. Chl fluorescence emission measured with isolated PSI submembrane fractions was reduced following the addition of exogeno...

Molecular dynamics simulation of vibrational energy relaxation of highly excited molecules in fluids. I. General considerations

Enlarged molecules from excited atoms in nanochannels

Collisional energy transfer in highly excited molecules.

The excitation/de-excitation step in the Lindemann mechanism is investigated in detail using model development and classical trajectory studies based on a realistic potential energy surface. The model, based on a soft-sphere/line-of-centers approach and using elements of Landau-Teller theory and phase space theory, correctly predicts most aspects of the joint probability distribution P(ΔE,ΔJ) f...