摘要:
To quench the fluorescence generated by anionic optical brighteners, virtually colourless, water-soluble, cationic compounds are used which contain at least one cationic group per molecule or per repeating structural unit and at least two nitro group-free naphthalene-peridicarboxylic acid imide groups per molecule or at least one such group per repeating structural unit.
摘要:
Compounds of the formula ##STR1## in which M each independently is hydrogen, an alkali metal ion, an ammonium ion, or an ammonium ion substituted by up to four C.sub.1 to C.sub.5 -alkyl and/or hydroxyalkyl radicals,are fluorogenic and suitable for the fluorimetric determination of phosphatases.
摘要:
Dyestuffs of the formula ##STR1## wherein R represents hydrogen or optionally substituted alkyl,A represents ##STR2## wherein R.sup.1 represents hydrogen, optionally substituted alkyl or cycloalkyl andR.sup.2 represents optionally substituted alkyl which can close a ring to ring B, aralkyl or aryl orR.sup.1 and R.sup.2, together with the N atom, form a ring,D and E represent hydrogen, optionally substituted alkyl or alkenyl and D additionally represents aryl, aralkyl, aralkenyl or a heterocyclic radical, or D and E, together with the C atom, form a ring andAn.sup.- represents an anion,are used for pulp-coloring paper and dyeing cationically dyeable fibres.
摘要:
7-Hydroxy-coumarin compounds of the general formula ##STR1## wherein A represents a heterocyclic radical, which can contain non-ionic substituents customary in dye-stuff chemistry,R represents hydrogen or cyano andZ represents oxygen or NH andthe ring B can be further substituted non-ionically,are used for impregnating paper, in particular paper which has to be made forgery-proof.
摘要:
The subject of the invention are dyestuffs of the formula ##STR1## wherein R is hydrogen or a hydrocarbon radicalQ is arylX is .dbd.C(W)-- or .dbd.N--,W is a nitrile ester or amide groups andA represents the remaining members of a heterocyclic radical.The dyestuff are preferably suitable for dyeing polyester fibres which are dyed in orange, red, violet or bluish shades with good fastness to light.
摘要:
The invention relates to compounds of the formula ##STR1## WHEREIN Z denotes OH or NR.sup.1 R.sup.2,R.sup.1 denotes hydrogen, alkyl, aralkyl, cycloalkyl or aryl,R.sup.2 denotes hydrogen or alkyl or, conjointly with R.sup.1, forms an alkylene chain.The dyestuffs are outstanding suitable for the dyeing of polyester fibres. The yellow and reddish dyeings are distinguished by good fastness to light.
摘要:
Heteropolyacid salts of the formula ##STR1## R.sup.1 and R.sup.2 independently of one another stand for hydrogen, chlorine, bromine, hydroxyl, C.sub.1 - to C.sub.4 -alkoxy, nitro or carboxyl,A stand for C.sub.1 - to C.sub.5 -alkylene or --C.sub.6 H.sub.4 --CH.sub.2 -- (m- or p-),m stands for 0 or 1,n stands for 1 or 2,K.sup..sym. stands for ##STR2## R.sup.3 stands for C.sub.1 - to C.sub.24 -alkyl, carbamoyl-C.sub.1 - to C.sub.2 -alkyl, C.sub.1 - to C.sub.4 -alkoxycarbonyl-C.sub.1 - to C.sub.2 -alkyl, benzyl, cyclohexyl or allyl,R.sup.4 stands for C.sub.1 - to C.sub.4 -alkyl or a single bond linked to D,R.sup.5 stands for C.sub.1 - to C.sub.4 -alkyl,D stands for --CH.sub.2 --, --CH.sub.2 --CO--, --CH.sub.2 --CO--NH-- or --CH.sub.2 --CO--NH--CH.sub.2 --,W stands for ##STR3## CO or for single bond, Z stands for --CH.sub.2 --, ##STR4## --O--, --S--, --SO.sub.2 -- or a single bond and X.sup..crclbar. stands for an anion of a heteropolyacid based on tungsten and/or molybdenum containing phosphorus, silicon, vanadium, cobalt, nickel, manganese, chromium and/or aluminum,are used as additives for reinforcing the positive charge in electrographic toners.
摘要:
A light-collecting system, which contains a coumarin derivative of the formula ##STR1## in which T denotes O or NR.sub.4,R.sub.4 represents hydrogen, optionally substituted aryl, cycloalkyl or aralkyl,R.sub.1 denotes a carbocyclic or heterocyclic 5 or 6 membered ring bonded via a C.atom, or a 5 or 6 membered heterocyclic ring which is bonded via a N atom and is rotationally asymmetrical to an axis placed through the coumarin/N-heterocyclic bond, the 5 or 6 membered rings may carry non-ionic substituents and for an optionally substituted benzene ring or naphthalene ring to be fused to the said rings;X signifies ##STR2## or --OR.sub.2 ', R.sub.2 represents hydrogen, alkyl, cycloalkyl, aralkyl or aryl, hydrocarbon radicals may be substituted, andR.sub.3, in addition to having the definitions given for R.sub.2, also signifies a radical of the formulaeR.sub.6 --(X).sub.n --CO-- or R.sub.7 --(X).sub.n --SO.sub.2 --R.sub.6 and R.sub.7 represent alkyl, cycloalkyl, aryl or aralkyl, the hydrocarbon radicals may be substituted,X represents NH or O andn represents O or 1, orR.sub.2 and R.sub.3 together with the N atom and optionally with the inclusion of further hetero-atoms form a 5 or 6 membered ring, this ring may carry non-ionic substituents and an optionally substituted benzene ring or naphthalene ring may be fused thereto, orR.sub.2 and R.sub.3 together form a di-unsaturated radical of the formula ##STR3## R.sub.8 represents optionally substituted alkyl, aryl, cycloalkyl or aralkyl, andR.sub.2 ' signifies optionally substituted alkyl, alkenyl, cycloalkyl, aryl or aralkyl,and their use in light-collecting systems.
摘要:
To quench the fluorescence produced by anionic fluorescent brighteners use is made of virtually colorless, water-soluble cationic or amphoteric compounds which contain in the molecule at least one ammonium group, at least two aryl, arylene, hetaryl and/or hetarylene groups and at least one nitro group.
摘要:
A light-collecting system, characterized in that it contains a coumarin derivative of the formula ##STR1## in which T denotes O or NR.sub.4, in whichR.sub.4 represents hydrogen, optionally substituted aryl, optionally substituted cycloalkyl or optionally substituted aralkyl,R.sub.1 denotes a carbocyclic or heterocyclic 5-membered or 6-membered ring bonded via a C atom, or a 5-membered or 6-membered heterocyclic ring which is bonded via a N atom and is rotationally asymmetrical to an axis placed through the coumarin/N-heterocyclic bond, it being possible for the said 5-membered or 6-membered rings to carry non-ionic substituents and for an optionally substituted benzene ring or an optionally substituted naphthalene ring to be fused to the said rings;X signifies ##STR2## or --OR.sub.2 ', in which R.sub.2 represents hydrogen, alkyl, cycloalkyl, aralkyl or aryl, it being possible for the said hydrocarbon radicals to be substituted, and R.sub.3, in addition to having the definitions given for R.sub.2, also signifies a radical of the formulaeR.sub.6 --(X).sub.n --CO--orR.sub.7 --(X).sub.n --SO.sub.2 -- in whichR.sub.6 and R.sub.7 represent alkyl, cycloalkyl, aryl or aralkyl, it being possible for the said hydrocarbon radicals to be substituted,X represents NH or O andn represents 0 or 1, orR.sub.2 and R.sub.3 together with the N atom and optionally with the inclusion of further hetero-atoms form a 5-membered or 6-membered ring, it being possible for this ring to carry non-ionic substituents and for an optionally substituted benzene ring or an optionally substituted naphthalene ring to be fused thereto, orR.sub.2 and R.sub.3 together form a di-unsaturated radical of the formula ##STR3## in which R.sub.8 represents optionally substituted alkyl, optionally substituted aryl, optionally substituted cycloalkyl or optionally substituted aralkyl, andR.sub.2 ' signifies optionally substituted alkyl, alkenyl, optionally substituted cycloalkyl, optionally substituted aryl or optionally substituted aralkyl,and the use of coumarin derivatives in light-collecting systems.