The exciton contribution to the Faraday B term MCD of molecular dimers

Joseph L. Hughes; Ron J. Pace; Elmars Krausz

doi:10.1016/j.cplett.2003.12.067

The exciton contribution to the Faraday B term MCD of molecular dimers

Joseph L. Hughes^*, Ron J. Pace, Elmars Krausz

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

Absorption properties of aggregated molecular systems, which are not necessarily chemically bonded, can be analysed in terms of exciton phenomena. Angular momentum terms arising from exciton coupling often dominate the natural circular dichroism (CD) of molecular aggregates. This Letter, for the first time, extends such an analysis to the magnetic circular dichroism (MCD) of exciton-coupled molecular dimers. In particular, we determine the contribution to the Faraday B term MCD of an arbitrary dimer. A reduction in the MCD/absorbance ratio has been reported for various aggregated chlorophyll-like systems. Our analysis suggests that such observed variations in the B terms are not easily attributed to exciton coupling.

Original language	English
Pages (from-to)	116-121
Number of pages	6
Journal	Chemical Physics Letters
Volume	385
Issue number	1-2
DOIs	https://doi.org/10.1016/j.cplett.2003.12.067
Publication status	Published - 2 Feb 2004

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10.1016/j.cplett.2003.12.067

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abstract = "Absorption properties of aggregated molecular systems, which are not necessarily chemically bonded, can be analysed in terms of exciton phenomena. Angular momentum terms arising from exciton coupling often dominate the natural circular dichroism (CD) of molecular aggregates. This Letter, for the first time, extends such an analysis to the magnetic circular dichroism (MCD) of exciton-coupled molecular dimers. In particular, we determine the contribution to the Faraday B term MCD of an arbitrary dimer. A reduction in the MCD/absorbance ratio has been reported for various aggregated chlorophyll-like systems. Our analysis suggests that such observed variations in the B terms are not easily attributed to exciton coupling.",

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T1 - The exciton contribution to the Faraday B term MCD of molecular dimers

AU - Hughes, Joseph L.

AU - Pace, Ron J.

AU - Krausz, Elmars

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Y1 - 2004/2/2

N2 - Absorption properties of aggregated molecular systems, which are not necessarily chemically bonded, can be analysed in terms of exciton phenomena. Angular momentum terms arising from exciton coupling often dominate the natural circular dichroism (CD) of molecular aggregates. This Letter, for the first time, extends such an analysis to the magnetic circular dichroism (MCD) of exciton-coupled molecular dimers. In particular, we determine the contribution to the Faraday B term MCD of an arbitrary dimer. A reduction in the MCD/absorbance ratio has been reported for various aggregated chlorophyll-like systems. Our analysis suggests that such observed variations in the B terms are not easily attributed to exciton coupling.

AB - Absorption properties of aggregated molecular systems, which are not necessarily chemically bonded, can be analysed in terms of exciton phenomena. Angular momentum terms arising from exciton coupling often dominate the natural circular dichroism (CD) of molecular aggregates. This Letter, for the first time, extends such an analysis to the magnetic circular dichroism (MCD) of exciton-coupled molecular dimers. In particular, we determine the contribution to the Faraday B term MCD of an arbitrary dimer. A reduction in the MCD/absorbance ratio has been reported for various aggregated chlorophyll-like systems. Our analysis suggests that such observed variations in the B terms are not easily attributed to exciton coupling.

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DO - 10.1016/j.cplett.2003.12.067

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SN - 0009-2614

VL - 385

SP - 116

EP - 121

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-2

ER -

The exciton contribution to the Faraday B term MCD of molecular dimers

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