Nonlinearly optically active compounds
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United States of America Patent
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Jul 9, 1996
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Mar 21, 1994
filing date -
Sep 15, 1988
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Abstract
Novel nonlinearly optically active compound's, well suited for electrooptical applications, have the following general formulae: ##STR1## wherein D is an electron donor group; A and A.sub.1, which may be identical or different, are each an electron acceptor group; and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each a lower alkyl radical or a hydrogen atom.
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