Organic nonlinear optical material
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United States of America Patent
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Jul 6, 1993
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N/A
app pub date -
Feb 24, 1992
filing date -
Apr 28, 1989
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Expired
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Abstract
An organic nonlinear optical material comprising a 4-nitrophenylaminoacetaldehyde acetal of the following formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represent a hydrogen atom, or a linear or branched alkyl group having 1 to 6 carbon atoms, and R.sub.4 represents a hydrogen atom, a linear or branched alkyl group having 1 to 6 carbon atoms, a linear or branched alkoxy group having 1 to 6 carbon atoms, a hydroxyl group, a nitro group or a halogen atom.
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