It is found that stereoisomers and different substituent groups have great effect on the photophysical properties such as electronic absorption wavelengths, electron transition properties, and NLO responses.
Obviously, this kind of near-gap electronic structure is not conducive for the electron transition of B20 cluster under illumination.
In fact, once a proton tunneling "velocity" is defined, p is determined by the speed of the proton "motion" across the region where the electron transition may occur with appreciable probability (the electronic energy matching window).
Furthermore, the presence of the impurity level may make a complex electron transition from valence band to conduction band under an external electronic field which is favorable for the amelioration of the electrical conductivity of diamond.
When, in eq 7.10, the time for proton tunneling is much longer than the time for the electron transition, the proton sees the mix of the initial and final diabatic electronic states; namely, the PT occurs on the electronically adiabatic ground state as expected for HAT.
The absorptions show main characteristic of π electron transition [19].
To electron transition is occurred, the minimum energy must be provided.
They have analyzed their data based on single electron transition (SET) using density functional theory.
b A proposed model of photoinduced electron transition between NCDs and TiO2.
The absorption band at 330 nm exhibits due to the π π* electron transition within benzenoid segment.
The value of n refers to direct (n = 2) or indirect (n = 1/2) electron transition [28].
