Polymers, monomers, narrow-band absorbing polymers, narrow-band absorbing monomers, absorbing units, polymer dots, and related methods are provided. Bright, luminescent polymer nanoparticles with narrow-band absorptions are provided. Methods for synthesizing absorbing monomers, methods for synthesizing the polymers, preparation methods for forming the polymer nanoparticles, and applications for using the polymer nanoparticles are also provided.

Polymers, monomers, narrow-band absorbing polymers, narrow-band absorbing monomers, absorbing units, polymer dots, and related methods are provided. Bright, luminescent polymer nanoparticles with narrow-band absorptions are provided. Methods for synthesizing absorbing monomers, methods for synthesizing the polymers, preparation methods for forming the polymer nanoparticles, and applications for using the polymer nanoparticles are also provided.

A method for producing a reactive intermediate composition, including: reacting a substituted phthalic anhydride of the formula (I) with a diamine of the formula H.sub.2N—R—NH.sub.2 in the presence of an aromatic dianhydride in an amount of 10 to 50 mole percent based on the total moles of anhydride functionality in the reaction; wherein the reacting is conducted in an aprotic solvent in a reactor, under conditions effective to produce the reactive intermediate composition; and wherein X comprises a halogen or a nitro group, and R comprises a C.sub.6-36 aromatic hydrocarbon group or a halogenated derivative thereof, a straight or branched chain C.sub.2-20 alkylene or a halogenated derivative thereof, or a C.sub.3-8 cycloalkylene or a halogenated derivative thereof. ##STR00001##

A method for producing a reactive intermediate composition, including: reacting a substituted phthalic anhydride of the formula (I) with a diamine of the formula H.sub.2N—R—NH.sub.2 in the presence of an aromatic dianhydride in an amount of 10 to 50 mole percent based on the total moles of anhydride functionality in the reaction; wherein the reacting is conducted in an aprotic solvent in a reactor, under conditions effective to produce the reactive intermediate composition; and wherein X comprises a halogen or a nitro group, and R comprises a C.sub.6-36 aromatic hydrocarbon group or a halogenated derivative thereof, a straight or branched chain C.sub.2-20 alkylene or a halogenated derivative thereof, or a C.sub.3-8 cycloalkylene or a halogenated derivative thereof. ##STR00001##

A process for preparing a polyaminoborane comprising reacting at least one monomer with an aminoborane, wherein the at least one monomer is selected from the group consisting of ammonia, a primary amine and a substituted or unsubstituted hydrazine; and wherein the aminoborane comprises a borane substituted by a secondary amino group; polyaminoboranes obtainable by said process; use of said polyaminoboranes for the preparation of a ceramic precursor or a ceramic, the production of boron nitride, or the storage and/or production of dihydrogen; ceramic precursors, ceramics, hydrogen cells or energy materials comprising said polyaminoboranes.

A process for preparing a polyaminoborane comprising reacting at least one monomer with an aminoborane, wherein the at least one monomer is selected from the group consisting of ammonia, a primary amine and a substituted or unsubstituted hydrazine; and wherein the aminoborane comprises a borane substituted by a secondary amino group; polyaminoboranes obtainable by said process; use of said polyaminoboranes for the preparation of a ceramic precursor or a ceramic, the production of boron nitride, or the storage and/or production of dihydrogen; ceramic precursors, ceramics, hydrogen cells or energy materials comprising said polyaminoboranes.

A method for manufacturing a part made of composite material includes forming a ceramic matrix phase in pores of a fibrous preform by pyrolysis of a cross-linked copolymer ceramic precursor, the cross-linked copolymer including a first precursor macromolecular chain of a first ceramic having free carbon, and a second precursor macromolecular chain of a second ceramic having free silicon, the first macromolecular chain being bonded to the second macromolecular chain by cross-linking bridges including a bonding structure of formula *.sup.1—X—*.sup.2; in this formula, X designates boron or aluminium, -*.sup.1 designates the bond to the first macromolecular chain and -*.sup.2 the bond to the second macromolecular chain.

A method for manufacturing a part made of composite material includes forming a ceramic matrix phase in pores of a fibrous preform by pyrolysis of a cross-linked copolymer ceramic precursor, the cross-linked copolymer including a first precursor macromolecular chain of a first ceramic having free carbon, and a second precursor macromolecular chain of a second ceramic having free silicon, the first macromolecular chain being bonded to the second macromolecular chain by cross-linking bridges including a bonding structure of formula *.sup.1—X—*.sup.2; in this formula, X designates boron or aluminium, -*.sup.1 designates the bond to the first macromolecular chain and -*.sup.2 the bond to the second macromolecular chain.

The invention relates to functionalised dioxaborolane or dioxaborinane derivatives of formula (I), wherein R.sub.1 is covalently bonded to the boron atom by a carbon atom; one of R.sub.2, R.sub.3, R′.sub.3 or R.sub.4 is a radical of formula —X; or one of R.sub.1, R.sub.2, R.sub.3, R′.sub.3 or R.sub.4 is a radical of formula —X; and X is a functionalised radical. The invention relates to the method for preparing same and the uses thereof.

The invention relates to functionalised dioxaborolane or dioxaborinane derivatives of formula (I), wherein R.sub.1 is covalently bonded to the boron atom by a carbon atom; one of R.sub.2, R.sub.3, R′.sub.3 or R.sub.4 is a radical of formula —X; or one of R.sub.1, R.sub.2, R.sub.3, R′.sub.3 or R.sub.4 is a radical of formula —X; and X is a functionalised radical. The invention relates to the method for preparing same and the uses thereof.