Gyration and Permittivity of Ethylenediammonium Sulfate Crystals

Shane Nichols; Alexander Martin; Joshua Choi; Bart Kahr

doi:10.1002/chir.22603

Gyration and Permittivity of Ethylenediammonium Sulfate Crystals

Shane Nichols, Alexander Martin, Joshua Choi, Bart Kahr

Chemistry

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

Abstract

Ethylenediammonium sulfate (EDS) crystals were grown from aqueous solution and cleaved into thin (100-500 micron) plates. The 422 point group of EDS was confirmed by X-ray diffraction. The constitutive relations of EDS crystals were determined through generalized ellipsometry with an instrument that uses four photoelastic modulators (4PEM). The optical rotation at 500 nm, for example, was + 22.9°/mm along the optic axis and - 12.1°/mm perpendicular to the optic axis for the P4₁2₁2 crystals. Enantiomorphous twins frequently form across the (001) plane. Mirrored halves must be separated by cleavage in advance of optical measurements. Chirality 28:460-465, 2016.

Original language	English (US)
Pages (from-to)	460-465
Number of pages	6
Journal	Chirality
Volume	28
Issue number	6
DOIs	https://doi.org/10.1002/chir.22603
State	Published - Jun 1 2016

Keywords

bianisotropic
chiral twinning
ellipsometry
gyration
multiple reflections
optical activity
polarimetry

ASJC Scopus subject areas

Analytical Chemistry
Catalysis
Pharmacology
Drug Discovery
Spectroscopy
Organic Chemistry

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10.1002/chir.22603

Cite this

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title = "Gyration and Permittivity of Ethylenediammonium Sulfate Crystals",

abstract = "Ethylenediammonium sulfate (EDS) crystals were grown from aqueous solution and cleaved into thin (100-500 micron) plates. The 422 point group of EDS was confirmed by X-ray diffraction. The constitutive relations of EDS crystals were determined through generalized ellipsometry with an instrument that uses four photoelastic modulators (4PEM). The optical rotation at 500 nm, for example, was + 22.9°/mm along the optic axis and - 12.1°/mm perpendicular to the optic axis for the P41212 crystals. Enantiomorphous twins frequently form across the (001) plane. Mirrored halves must be separated by cleavage in advance of optical measurements. Chirality 28:460-465, 2016.",

keywords = "bianisotropic, chiral twinning, ellipsometry, gyration, multiple reflections, optical activity, polarimetry",

author = "Shane Nichols and Alexander Martin and Joshua Choi and Bart Kahr",

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AU - Nichols, Shane

AU - Martin, Alexander

AU - Choi, Joshua

AU - Kahr, Bart

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N2 - Ethylenediammonium sulfate (EDS) crystals were grown from aqueous solution and cleaved into thin (100-500 micron) plates. The 422 point group of EDS was confirmed by X-ray diffraction. The constitutive relations of EDS crystals were determined through generalized ellipsometry with an instrument that uses four photoelastic modulators (4PEM). The optical rotation at 500 nm, for example, was + 22.9°/mm along the optic axis and - 12.1°/mm perpendicular to the optic axis for the P41212 crystals. Enantiomorphous twins frequently form across the (001) plane. Mirrored halves must be separated by cleavage in advance of optical measurements. Chirality 28:460-465, 2016.

AB - Ethylenediammonium sulfate (EDS) crystals were grown from aqueous solution and cleaved into thin (100-500 micron) plates. The 422 point group of EDS was confirmed by X-ray diffraction. The constitutive relations of EDS crystals were determined through generalized ellipsometry with an instrument that uses four photoelastic modulators (4PEM). The optical rotation at 500 nm, for example, was + 22.9°/mm along the optic axis and - 12.1°/mm perpendicular to the optic axis for the P41212 crystals. Enantiomorphous twins frequently form across the (001) plane. Mirrored halves must be separated by cleavage in advance of optical measurements. Chirality 28:460-465, 2016.

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KW - ellipsometry

KW - gyration

KW - multiple reflections

KW - optical activity

KW - polarimetry

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Gyration and Permittivity of Ethylenediammonium Sulfate Crystals

Abstract

Keywords

ASJC Scopus subject areas

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