Linear Dichroism Spectroscopy: Theory

Alison Rodger

doi:10.1007/978-3-642-16712-6_641

Linear Dichroism Spectroscopy: Theory

Alison Rodger^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Entry for encyclopedia/dictionary › peer-review

Abstract

Synonyms
Linear dichroism spectroscopy

Definition
LD is defined as the difference in absorption of two linearly polarized light beams that are polarized at right angles to one another and to the direction of propagation:

LD = A_//– A_⊥ (1)

This notation is normally reserved for uniaxial samples with // denoting the direction of the unique axis. So, although most LD experiments have (or are assumed to have) effective uniaxial orientation, it is better when deriving equations to use the more general definition

LD = A_Z– A_Y (2)

where A_Z is the absorbance of Z-polarized light, and similarly A_Y. {X, Y, Z} form what is known as a laboratory-fixed axis system since they are used to identify macroscopic aspects of the experiment. We shall use {x, y, z} for the molecule-fixed axis system where z is the molecular orientation axis. For any one molecule the two axis systems are...

Original language	English
Title of host publication	Encyclopedia of Biophysics
Editors	Gordon C. K. Roberts
Place of Publication	Berlin, Heidelberg
Publisher	Springer Science+Business Media B.V.
Pages	1244-1248
Number of pages	5
ISBN (Electronic)	9783642167126
ISBN (Print)	9783642167119
DOIs	https://doi.org/10.1007/978-3-642-16712-6_641
Publication status	Published - 2013
Externally published	Yes

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10.1007/978-3-642-16712-6_641

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title = "Linear Dichroism Spectroscopy: Theory",

abstract = "Synonyms Linear dichroism spectroscopy Definition LD is defined as the difference in absorption of two linearly polarized light beams that are polarized at right angles to one another and to the direction of propagation: LD = A// – A⊥ (1) This notation is normally reserved for uniaxial samples with // denoting the direction of the unique axis. So, although most LD experiments have (or are assumed to have) effective uniaxial orientation, it is better when deriving equations to use the more general definition LD = AZ – AY (2) where AZ is the absorbance of Z-polarized light, and similarly AY. \{X, Y, Z\} form what is known as a laboratory-fixed axis system since they are used to identify macroscopic aspects of the experiment. We shall use \{x, y, z\} for the molecule-fixed axis system where z is the molecular orientation axis. For any one molecule the two axis systems are...",

author = "Alison Rodger",

year = "2013",

doi = "10.1007/978-3-642-16712-6\_641",

language = "English",

isbn = "9783642167119",

pages = "1244--1248",

editor = "Roberts, \{Gordon C. K.\}",

booktitle = "Encyclopedia of Biophysics",

publisher = "Springer Science+Business Media B.V.",

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PY - 2013

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N2 - Synonyms Linear dichroism spectroscopy Definition LD is defined as the difference in absorption of two linearly polarized light beams that are polarized at right angles to one another and to the direction of propagation: LD = A// – A⊥ (1) This notation is normally reserved for uniaxial samples with // denoting the direction of the unique axis. So, although most LD experiments have (or are assumed to have) effective uniaxial orientation, it is better when deriving equations to use the more general definition LD = AZ – AY (2) where AZ is the absorbance of Z-polarized light, and similarly AY. {X, Y, Z} form what is known as a laboratory-fixed axis system since they are used to identify macroscopic aspects of the experiment. We shall use {x, y, z} for the molecule-fixed axis system where z is the molecular orientation axis. For any one molecule the two axis systems are...

AB - Synonyms Linear dichroism spectroscopy Definition LD is defined as the difference in absorption of two linearly polarized light beams that are polarized at right angles to one another and to the direction of propagation: LD = A// – A⊥ (1) This notation is normally reserved for uniaxial samples with // denoting the direction of the unique axis. So, although most LD experiments have (or are assumed to have) effective uniaxial orientation, it is better when deriving equations to use the more general definition LD = AZ – AY (2) where AZ is the absorbance of Z-polarized light, and similarly AY. {X, Y, Z} form what is known as a laboratory-fixed axis system since they are used to identify macroscopic aspects of the experiment. We shall use {x, y, z} for the molecule-fixed axis system where z is the molecular orientation axis. For any one molecule the two axis systems are...

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BT - Encyclopedia of Biophysics

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PB - Springer Science+Business Media B.V.

CY - Berlin, Heidelberg

ER -

Linear Dichroism Spectroscopy: Theory

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