Photoinduced chlorophyll charge transfer state identified in the light-harvesting complex II from a marine green alga .

The light-harvesting complex II of (-LHCII), a green alga, differs from that of spinach (-LHCII) in chlorophyll (Chl) and carotenoid (Car) compositions. We investigated ultrafast excitation dynamics of -LHCII with visible-to-near infrared time-resolved absorption spectroscopy. Absolute fluorescence quantum yield ( ) of LHCII and spectroelectrochemical (SEC) spectra of Chl and were measured to assist the spectral analysis.

A Possible Mechanism for Aggregation-Induced Chlorophyll Fluorescence Quenching in Light-Harvesting Complex II from the Marine Green Alga .

The light-harvesting complex II of a green alga (-LHCII) is peculiar in that it contains siphonein and siphonaxathin as carotenoid (Car). Since the S state of siphonein and siphonaxathin lies substantially higher than the Q state of chlorophyll (Chl ), the Chl (Q)-to-Car(S) excitation energy transfer is unfeasible. To understand the photoprotective mechanism of algal photosynthesis, we investigated the influence of temperature on the excitation dynamics of -LHCII in trimeric and aggregated forms.

Experimental and Computational Study on Photophysical Properties of Mesoionic Chalcogenones.

N-Heterocyclic carbene adducts with main group elements (NHC=E) have aroused great interest and have been widely investigated in coordination chemistry. Among them, N-heterocyclic carbene adducts with chalcogens (NHC=Ch) have been known for a long time. Their investigations mostly focused on synthesis, coordination chemistry and electrochemistry.