Energy transfer, excited-state deactivation, and exciplex formation in artificial caroteno-phthalocyanine light-harvesting antennas

Article Abstract:

Analysis on a range of artificial light-harvesting dyads built fro zinc phthalocyanine (Pc) covalently attached to carotenoids with 9,10 or 11 conjugated carbon-carbon double bonds is performed to determine the energy transfer and excited-state deactivation pathway following excitation of the strongly allowed carotenoid [S.sub.2] state as a function of the conjugation length. A new unseen energy relaxation pathways and a unique type of collective carotenoid-phthalocyanine excited state in carotenophthaloyanine dyads are observed.

Analysis, Carbon compounds, Energy transformation

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Molecular interface effect on heterogeneous molecular junctions consisting of nonfluorinated and fluorinated phthalocyanines

Article Abstract:

The tunneling behavior of homogeneous and heterogeneous molecular junctions is reported using p-type molecules of iron phthalocyanine (FePc), phthalocyanine (H2Pc), and copper(II) octaalkoxyl substituted phthalocyanine (CuPcOC8) and n-type molecule of copper hexadecafluorophthalocyanine. Results suggest that the substitution of phthalocyanines and surface affinity of phthalocyanines could contribute to the controlled phase separation within the heterogeneous tunneling junctions.

Iron compounds, Copper compounds, Structure

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Electronic energy levels in individual molecules, thin films, and organic heterojunctions of substituted phthalocyanines

Article Abstract:

The experiment was done by using ultraviolet photoelectron spectroscopy on phthalocyanine samples in the gas phase and as thin vapor-deposited solid films. The result shows the offset between the highest occupied electronic levels, the establishment of a surface diapole and the redistribution of charge in the heterointerface region beyond molecular contact.

Usage, Chemistry, Analytic, Analytical chemistry, Photoelectron spectroscopy

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