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A novel spectroscopic probe for molecular chirality
Author(s) -
Ji Na,
Shen YuenRon
Publication year - 2006
Publication title -
chirality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.43
H-Index - 77
eISSN - 1520-636X
pISSN - 0899-0042
DOI - 10.1002/chir.20238
Subject(s) - chirality (physics) , chemistry , circular dichroism , monolayer , molecule , resonance (particle physics) , planar chirality , vibrational circular dichroism , chemical physics , computational chemistry , molecular physics , stereochemistry , enantioselective synthesis , atomic physics , organic chemistry , physics , chiral symmetry breaking , symmetry breaking , quantum mechanics , catalysis , biochemistry , nambu–jona lasinio model
Recent advances in developing sum frequency generation (SFG) as a novel spectroscopic probe for molecular chirality are reviewed. The basic principle underlying the technique is briefly described, in comparison with circular dichroism (CD). The significantly better sensitivity of the technique than CD is pointed out, and the reason is discussed. Bi‐naphthol (BN) and amino acids are used as representatives for two different types of chiral molecules; the measured chirality in their electronic transitions can be understood by two different molecular models, respectively, that are extensions of models developed earlier for CD. Optically active or chiral SFG from vibrational transitions are weaker, but with the help of electronic‐vibrational double resonance, the vibrational spectrum of a monolayer of BN has been obtained. Generally, optically active SFG is sufficiently sensitive to be employed to probe in‐situ chirality of chiral monolayers and thin films. © 2006 Wiley‐Liss, Inc. Chirality