Research output: Contribution to book/anthology/report/proceeding › Book chapter › Research › peer-review
Anisotropy Spectra for Enantiomeric Differentiation of Biomolecular Building Blocks. / Evans, Amanda C.; Meinert, Cornelia; Bredehoft, Jan H. et al.
Differentiation of Enantiomers II. ed. / Volker Schurig. Vol. 341 Springer, 2013. p. 271-300 (Topics in Current Chemistry).Research output: Contribution to book/anthology/report/proceeding › Book chapter › Research › peer-review
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TY - CHAP
T1 - Anisotropy Spectra for Enantiomeric Differentiation of Biomolecular Building Blocks
AU - Evans, Amanda C.
AU - Meinert, Cornelia
AU - Bredehoft, Jan H.
AU - Giri, C.
AU - Jones, Nykola C.
AU - Hoffmann, Søren Vrønning
AU - Meierhenrich, Uwe J.
PY - 2013
Y1 - 2013
N2 - All biopolymers are composed of homochiral building blocks, and both D-sugars and L-amino acids uniquely constitute life on Earth. These monomers were originally enantiomerically differentiated under prebiotic conditions. Particular progress has recently been made in support of the photochemical model for this differentiation: the interaction of circularly polarized light with racemic molecules is currently thought to have been the original source for life’s biological homochirality. The differential asymmetric photoreactivity of particular small molecules can be characterized by both circular dichroism and anisotropy spectroscopy. Anisotropy spectroscopy, a novel derivative of circular dichroism spectroscopy, records the anisotropy factor g = Δε/ε as a function of the wavelength.Anisotropy spectroscopy promisingly affords the wavelength-dependent determination of the enantiomeric excess (ee) inducible into chiral organic molecules by photochemical irradiation with circularly polarized light. Anisotropy spectra of small molecules therefore provide unique means for characterizing the different photochemical behaviors between enantiomers upon exposure to various wavelengths of circularly polarized light. This chapter will: (1) present the theory and configuration of anisotropy spectroscopy; (2) explain experimentally recorded anisotropy spectra of selected chiral biomolecules such as amino acids; and (3) discuss the relevance of these spectra for the investigation of the origin of the molecular homochirality observed in living organisms. This review describes a new chiroptical technique that is of significance for advances in asymmetric photochemistry and that is also highly relevant for the European Space Agency Rosetta Mission, which will determine enantiomeric excesses (ees) in chiral organic molecules in cometary ices when it lands on Comet 67P/Churyumov–Gerasimenko in November 2014.
AB - All biopolymers are composed of homochiral building blocks, and both D-sugars and L-amino acids uniquely constitute life on Earth. These monomers were originally enantiomerically differentiated under prebiotic conditions. Particular progress has recently been made in support of the photochemical model for this differentiation: the interaction of circularly polarized light with racemic molecules is currently thought to have been the original source for life’s biological homochirality. The differential asymmetric photoreactivity of particular small molecules can be characterized by both circular dichroism and anisotropy spectroscopy. Anisotropy spectroscopy, a novel derivative of circular dichroism spectroscopy, records the anisotropy factor g = Δε/ε as a function of the wavelength.Anisotropy spectroscopy promisingly affords the wavelength-dependent determination of the enantiomeric excess (ee) inducible into chiral organic molecules by photochemical irradiation with circularly polarized light. Anisotropy spectra of small molecules therefore provide unique means for characterizing the different photochemical behaviors between enantiomers upon exposure to various wavelengths of circularly polarized light. This chapter will: (1) present the theory and configuration of anisotropy spectroscopy; (2) explain experimentally recorded anisotropy spectra of selected chiral biomolecules such as amino acids; and (3) discuss the relevance of these spectra for the investigation of the origin of the molecular homochirality observed in living organisms. This review describes a new chiroptical technique that is of significance for advances in asymmetric photochemistry and that is also highly relevant for the European Space Agency Rosetta Mission, which will determine enantiomeric excesses (ees) in chiral organic molecules in cometary ices when it lands on Comet 67P/Churyumov–Gerasimenko in November 2014.
U2 - 10.1007/128_2013_442
DO - 10.1007/128_2013_442
M3 - Book chapter
C2 - 23839281
SN - 978-3-319-03715-8
VL - 341
T3 - Topics in Current Chemistry
SP - 271
EP - 300
BT - Differentiation of Enantiomers II
A2 - Schurig, Volker
PB - Springer
ER -