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Accession number;04A0258606
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| Title;Pronounced Polarization Effect of Bulky Organic Salts. |
| Author;
MATSUMOTO KAYA
(Nashidai In)
HIGUCHI TSUNEHIKO
(Nashidai In)
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Journal Title;Abstracts. Symposium on Biofunctional Chemistry
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Journal Code:L0836A
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ISSN:
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VOL.18th;NO.;PAGE.46-47(2003)
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| Figure&Table&Reference;FIG.3, REF.1 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Electric field is one of the fundamental factors in nature. Recently significance of electric field in enzyme catalysis has been proposed. The active sites of some enzymes are known to polarize substrates although the interior of the space is rather hydrophobic. Large dipole of a peptide .ALPHA.-helix chain at the near site is presumably the source of the electric field. We have been interested in the effect of electric field on chemistry and designed bulky salts as molecules that solve in hydrophobic media and form strong electric field. We synthesized bulky salts and used N,N-dimethyl-p-nitroaniline and photochromic spiropyran as the probes for observing electric field effect. We have found that sodium tetraarylborates exhibited pronounced effect on the polarization of the indicators among the salts tested. Large bathochromic shifts in the spectra were observed for the NaAr4B while other salts had no effect. The NaAr4B have also been found to have unique ability to convert simple spiropyran into cyanine form of photochromic molecule without photo-irradiation. (author abst.) |
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