Proof of Chirality of J-Aggregates Spontaneously and Enantioselectively Generated from Achiral Dyes
The recently published claim , that the achiral 5,5',6,6'- tetrachlorobenzimidacarbocyanine chromophore spontaneously and enantioselectively generates chiral J-aggregates when it is substituted in the 1,1'-position with n-alkyl groups longer than hexyl and in the 3,3'-position wi...
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| Published in: | The journal of physical chemistry. B Vol. 104; no. 36; pp. 8664 - 8669 |
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| Main Authors: | , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
American Chemical Society
14-09-2000
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| Online Access: | Get full text |
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| Summary: | The recently published claim , that the achiral 5,5',6,6'- tetrachlorobenzimidacarbocyanine chromophore spontaneously and enantioselectively generates chiral J-aggregates when it is substituted in the 1,1'-position with n-alkyl groups longer than hexyl and in the 3,3'-position with ω-acido-ethyl or ω-acido-n-propyl groups has been proved by embedding the J-aggregates of such a dye (1a) in a polymeric PVA film and measuring the CD signal at defined observation angles. Dye 1b, which is assumed to give achiral J-aggregates, has been investigated for comparison as well. Possible contibutions of linear dichroism and birefringence of ordered molecules to the measured CD signal have been excluded by careful checks using both a plain PVA film and a film containing monomers of a dye (2) of known chirality. |
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| Bibliography: | istex:3F0BEECC28B73EB3B851F99C669035A0F5E0DF06 ark:/67375/TPS-NZK6ZJXB-P |
| ISSN: | 1520-6106 1520-5207 |
| DOI: | 10.1021/jp001805w |