Charge Transfer and Level Lifetime in Molecular Photon-Absorption upon the Quantum Impedance Lorentz Oscillator.

On the strength of the new quantum impedance Lorentz oscillator (QILO) model, a charge-transfer method in molecular photon-absorption is proposed and imaged via the numerical simulations of 1- and 2-photon-absorption (1PA and 2PA) behaviors of the organic compounds LB3 and M4 in this paper. According to the frequencies at the peaks and the full width at half-maximums (FWHMs) of the linear absorptive spectra of the two compounds, we first calculate the effective quantum numbers before and after the electronic transitions. Thus, we obtain the molecular average dipole moments, i.

One new piperazinedione isolated from a mangrove-derived fungus JX-5.

One new piperazinedione derivative, nigerpiperazine A (), along with six known compounds () were isolated from the fungus JX-5 from mangrove . Nigerpiperazine A () was elucidated by spectroscopic analyses and C NMR chemical shift calculations, compounds and were determined by X-ray and the CD spectra. The absolute configuration of was identified by X-ray for the first time.