Heterocyclic derivatives of naphthalene‐1,8‐dicarboxylic anhydride. Part II. Colour and dyeing properties on synthetic fibres of some substituted 7H‐benzimidazo[2,1‐a]benz[de]isoquinolin‐7‐ones

Abstract

The effect on colour resulting from substitution in the phenyl and naphthyl rings of 7H‐benzimidazo [2,1‐a]benz[de]isoquinolin‐7‐one (I) is discussed; dycing and fastness properties of these dyes on synthetic fibres are described and the synthesis of some new 1,8‐naphthalimides and derivatives of I recorded.

Covalently immobilized aminonaphthalimide as fluorescent carrier for the preparation of optical sensors

“…Quenching mechanism and principle of operation When an electron-donating group, for example an amino group, is introduced into the 1,8-naphthalimide molecule an intramolecular charge transfer structure is formed [17], resulting in a strongly fluorescing molecule. The nitro groups on the aromatic ring in picric acid are strong electron acceptors.…”

Selective Preparation of Fluorescent 1,8-Naphthalimides using Acidic Alumina under Microwave Irradiation

“…10,11 In the second method, the reaction between naphthalene-1,8-dicarboxylic anhydrides and appropriately substituted o-nitroanilines produces an intermediate-N-substituted-naphthalimide, which, in a second step, can be converted into the final product by chemical reduction and condensation. 10,11 In the second method, the reaction between naphthalene-1,8-dicarboxylic anhydrides and appropriately substituted o-nitroanilines produces an intermediate-N-substituted-naphthalimide, which, in a second step, can be converted into the final product by chemical reduction and condensation.…”

“…The first, employs the reaction between naphthalene-1,8dicarboxylic anhydride derivatives and appropriately substituted o-phenylenediamines. 10,11 In the second method, the reaction between naphthalene-1,8-dicarboxylic anhydrides and appropriately substituted o-nitroanilines produces an intermediate-N-substituted-naphthalimide, which, in a second step, can be converted into the final product by chemical reduction and condensation.…”

Glycan-Functionalized Fluorescent Chitin Nanocrystals for Biorecognition Applications

“…The dye, 4-(2-aminoethylamino)-7 H -benz[ de ]imidazo[2,1- a ]isoquinolin-7-one ( 2 ), gives greenish yellow fluorescence ( Figure S3 ) and was chosen due to its fastness properties and high relative fluorescence intensity. 15 , 16 Activation of the carboxyl groups in TCNs with EDC and NHS followed by conjugation with the dye 2 and Man derivative 5 yielded the dually functionalized nanocrystal TCN-dye-Man (Scheme 2 ; see Supporting Information for experimental details). The carboxyl groups in TCN were functionalized in high yield, as evidenced by the disappearance of the carboxyl absorption band around 1740 cm –1 in the FTIR spectrum ( Figure S4 ).…”