| 摘要 |
<p>PURPOSE:To provide the title ink compsn. which gives print and record which cannot be recognized under normal light and emit clear red light by irradiation with ultraviolet light, containing a europium complex having a benzoyltrifluoroacetone ligand. CONSTITUTION:A compd. of the formula (wherein R1 and R2 are each H, halogen, an alkyl, an alkoxy, amino, a dialkylamino, an alkylamino, an aryl or an aralkyl; A<+> is an org. or inorg. ammonium cation, a pyridinium cation, a phosphonium cation or a metal cation) is prepd. The compd. is incorporated in a varnish for ink to obtain a desired luminescent ink compsn. An example of the compd. of the formula is piperidium tetra(benzoyltrifluoroacetone) europium complex. The compd. is used in an amount of 0.001-10wt.% based on the ink compsn.</p> |
