Fluorescent perylene pigments

A compound of formula

• A(B).sub.x, (I),
• wherein x is 1 or 2,
• A is the radical of a chromophore ##STR36## or a derivative thereof, to N atoms of which x B group are attached, B is a group of formula ##STR37## or when x is 2, B may also be hydrogen, with the proviso that at least one B is a group of formula (II), (III) or (IV),
• m, n and p are each independently of one another 0 or 1,
• X is C.sub.1 -C.sub.14 alkylene or C.sub.2 -C.sub.8 alkenylene,
• Y is a group --V--(CH.sub.2).sub.q --,
• Z is a group --V--(CH.sub.2).sub.r --,
• V is C.sub.3 -C.sub.6 cycloalkylene,
• q is an integer from 1 to 6, and
• r is an integer from 0 to 6,
• R.sub.1 and R.sub.2 are each independently of the other hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, CN, NO.sub.2, unsubstituted phenyl or phenoxy or phenyl or phenoxy which are substituted by C.sub.1 -C.sub.4 alkyl,
• C.sub.1 -C.sub.4 alkoxy or halogen,
• Q is hydrogen, CN, Si(R.sub.1).sub.3 ;
• a group C(R.sub.5)(R.sub.6)(R.sub.7), wherein R.sub.5, R.sub.6 and R.sub.7 are each independently of one another hydrogen or halogen and at least one of R.sub.5, R.sub.6 and R.sub.7 is halogen;
• a group ##STR38## wherein R.sub.1 and R.sub.2 are as defined above;
• a group SO.sub.2 R.sub.8 or SR.sub.8, wherein R.sub.8 is C.sub.1 -C.sub.4 alkyl;
• a group CH(R.sub.9).sub.2, wherein R.sub.9 is unsubstituted phenyl or phenyl which is substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or halogen;
• or
• a group of formula ##STR39## R.sub.3 and R.sub.4 are each independently of the other hydrogen, C.sub.1 -C.sub.18 alkyl, a group ##STR40## wherein X, Y, R.sub.1, R.sub.2, m and n are as defined above, or R.sub.3 and R.sub.4, together with the linking nitrogen atom, form a pyrrolidinyl, piperidinyl or morpholinyl radical.