Fluorescent pigment compounds comprising aryl-ureido benzoxazinone compounds of the general formula (I):
wherein R
1
is an substituted or unsubstituted aryl group, R
2
and R
3
are each independently selected from an H atom, an alkyl group, an alkoxy group, an alkylcarboxy group and a halogen atom, X is a carbon or sulfur atom and n is an integer of 1 or more. Many of the compounds of this class produce a yellow, generally deep yellow, emission at wavelengths of about 560 to about 585 nm when excited by an appropriate UV source. These compounds produce fluorescence making them useful as fluorescent pigments, those compounds providing emission wavelengths within the range of from about 560 to about 585 or higher when excited by a UV source are particularly useful. Those compounds having this emission spectra for the compounds makes these compounds particularly useful as pigments in security applications, particularly as pigments for use in security inks and fibers.
含有芳基
脲基苯并
噁唑酮化合物的荧光
颜料化合物,其通式为(I):其中,R1是取代或未取代的芳基基团,R2和R3各自独立地选择自氢原子、烷基、烷氧基、烷基羧基和卤素原子,X是碳或
硫原子,n是1或更多的整数。这类化合物中的许多化合物在受到适当的紫外线源激发时产生黄色,通常是深黄色的发射,在约560至约585纳米的波长范围内产生荧光,使它们有用作荧光
颜料。当受到紫外线源激发时,这些化合物提供从约560至约585或更高的发射波长,使它们特别有用作安全应用中的
颜料,特别是作为安全油墨和纤维中的
颜料。