Perylene hydrazide imides of the general formula I a process for the preparation thereof, the use thereof as detection reagents for carbonyl compounds, protonic acids, acylating agents and metal salts, and also perylene hydrazones II and bi- and tri-fluorophoric perylene bisimides III, the preparation thereof and methods of using them.

The invention is directed to a process for preparing a bis(hydroxymethyl)perylenetetracarboximide compound by reacting perylene-3,4,9,10-tetracarboximide with formaldehyde. The bis(hydroxymethyl)perylenetetracarboximide can be isolated or further reacted in a one pot synthesis to yield a compound of the formula ##STR1## wherein X.sub.1 and X.sub.2 are organic radicals.

Perylene imide monocarboxylic acids of the general formula I ##STR1## perylene-3,4-dicarboxylic acid imides, perylene imide carboxylic acid derivatives and a process for the preparation of these compounds as well as their use, inter alia, as colourants.

A photoconductive imaging member comprised of an unsymmetrical perylene of the formula ##STR1## wherein each R.sub.1 and R.sub.2 are dissimilar and wherein the R.sub.1 and R.sub.2 are hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl, and substituted aralkyl, and X represents a symmetrical bridging component, and y represents the number of X components.

The invention is directed to a process for preparing a bis(hydroxymethyl)perylenetetracarboximide compound by reacting perylene-3,4,9,10-tetracarboximide with formaldehyde. The bis(hydroxymethyl)perylenetetracarboximide can be isolated or further reacted in a one pot synthesis to yield a compound of the formula ##STR1## wherein X.sub.1 and X.sub.2 are organic radicals.

Novel perylene-3,4,9,10-tetracarboxylic acid diimides of the formula ##STR1## where R.sup.1 and R.sup.2 are each isopropyl or R.sup.1 is methyl or ethyl and R.sup.2 is C.sub.3 - or C.sub.4 -alkyl, give clear, luminous, very lightfast, fluorescent orange colorations in plastics. The dyes are particularly suitable for concentrating light.

Brilliant and easily dispersible perylene-3,4,9,10-tetracarboxydiimide pigments of high color strength and N-alkyl derivatives thereof having 1 to 4 carbon atoms per alkyl group can be prepared by subjecting finely divided crude pigments to a treatment by means of a mixture of water and an organic solvent from the class of alcohols, ketones, carboxylic acids or carboxylic esters.

Perylimides useful as monomers have the formula ##STR1## wherein R.sup.1 is C.sub.1 -C.sub.20 -alkyl which may be interrupted by one or more oxygen atoms or is substituted phenyl, R.sup.2 has the meanings hydrogen, chlorine or substituted or unsubstituted phenoxy independently of one another in its four appearances, X is a chemical bond or a radical of the formula ##STR2## where R.sup.3 and R.sup.4 are each independently of the other hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or...

A class of sulforhodamine labeling reagents capable of binding with a biomolecular species to produce a conjugate with fluorescent properties. The sulforhodamine labeling reagents have the structure: ##STR1## The group X is selected from an alkyl, an olefin, a monocyclic aliphatic saturated hydrocarbon, an aryl, or nothing at all. The group Y is selected from an amide, a substituted amide, or nothing at all. The group Z is selected from a monocyclic aliphatic hydrocarbon, an aryl, or an alkyl, a...

A process for preparing perylene-3,4:9,10-tetracarboxylic diimides of the general formula I ##STR00001## comprising dimerizing a naphthalene-1,8-dicarboximide of the formula II ##STR00002## in a reaction medium consisting essentially of an apolar aprotic organic solvent and an alkali metal base and subsequently reoxidizing the resulting alkali metal salt of the leuco form of the perylene-3,4:9,10-tetracarboxylic diimide in the presence of a polar solvent.