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Measurement of circular birefringence and circular dichroism of the single crystals of Λ‐(+) 589 ‐ and Δ‐(−) 589 ‐tris(ethylenediamine)cobalt(III) triiodide monohydrate by the extended HAUP method
Author(s) -
Matsuki Ryo,
Asahi Toru,
Kobayashi Jinzo,
Asai Hiroshi
Publication year - 2004
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.20029
Subject(s) - chemistry , circular dichroism , birefringence , chirality (physics) , ethylenediamine , triiodide , crystallography , linear dichroism , crystal (programming language) , optical rotatory dispersion , optics , physics , inorganic chemistry , programming language , electrode , quantum mechanics , dye sensitized solar cell , computer science , nambu–jona lasinio model , electrolyte , quark , chiral symmetry breaking
We have achieved measuring four optical parameters simultaneously, namely, linear birefringence (LB), circular birefringence (CB), linear dichroism (LD), and circular dichroism (CD), of single crystals of Λ‐(+) 589 ‐ and Δ‐(−) 589 ‐tris(ethylenediamine) cobalt(III) triiodide monohydrate ( 1 ) along the <001> plane at the fixed wavelength (514.5 nm). Such measurements are possible only when the High Accuracy Universal Polarimeter (HAUP) is employed; it is called the extended HAUP method. Our experimental results showed that both LB and LD of the Λ‐(+) 589 ‐( 1 ) crystal have the same magnitude as those of the Δ‐(−) 589 ‐( 1 ) crystal. It was also revealed for the first time that the CB data of crystals of Λ‐(+) 589 ‐( 1 ) and Δ‐(−) 589 ‐( 1 ) are almost of the same magnitude, but are of opposite sign, reflecting their opposite absolute configurations. On the other hand, although the CD data obtained for Λ‐(+) 589 ‐( 1 ) is almost three times larger than that for Δ‐(−) 589 ‐( 1, ) these CD data are also opposite in sign, as expected from the opposite chirality of crystals. Chirality 16:286–293, 2004. © 2004 Wiley‐Liss, Inc.