Water‐Soluble Blue Fluorescence‐Emitting Hyperbranched Polysiloxanes Simultaneously Containing Hydroxyl and Primary Amine Groups

Abstract

In this Communication, novel water-soluble hyperbranched polysiloxanes (WHPSs) simultaneously containing hydroxyl and primary amine groups are developed. The polymers are constructed via melt polycondensation, that is, transesterification reaction between ethoxyl groups of (3-aminopropyl)triethoxysilane and hydroxyl groups of dihydric alcohols, using a one-step process under catalyst-free conditions. Surprisingly, the resultant WHPSs can emit bright blue fluorescence in the 100% solid state under the irradiation of UV light, and their photoluminescence intensities in aqueous solutions continuously go up along with increasing concentrations. Interestingly, their hydrolyzates display more intense luminescence compared to the unhydrolyzed. The efficient and easily controllable preparation strategy provides a remarkable and versatile platform for the fabrication of neoteric fluorescent materials for various potential applications.

Clustering‐Triggered Emission of Nonconjugated Polyacrylonitrile

“…Besides traditional conjugated compounds, recently, some unorthodox luminogens without classic chromophores, particularly those free of any hydrocarbon or heterocyclic aromatic building blocks were reported . Among these emerging luminophores, nonconjugated polymers with chain flexibility and structure tunability have aroused great interests because of their significant fundamental importance and promising technical applications . Generally, these polymers involve electron rich heteroatoms, such as nitrogen (N),[[8‐10b] oxygen (O), and sulfur (S).…”

“…Among these emerging luminophores, nonconjugated polymers with chain flexibility and structure tunability have aroused great interests because of their significant fundamental importance and promising technical applications . Generally, these polymers involve electron rich heteroatoms, such as nitrogen (N),[[8‐10b] oxygen (O), and sulfur (S). [12a] Compared with their conventional conjugated counterparts, they normally enjoy the advantages of good hydrophilicity, facile preparation, environment‐friendliness, outstanding biocompatibility, and so on, which render them highly suitable for biological and medical applications …”

“…Lately, this mechanism is found also applicable to rationalize other systems like poly[(maleicanhydride)‐alt‐(vinyl acetate)],[11a] linear and hyperbranched PAMAMs,[10a] sulfonated ethylenediamine–acetone–formaldehyde (SEAF)[10b] and sulfonated acetone–formaldehyde (SAF) condensates,[10c] hydroxyl and primary amine‐containing hyperbranched polysiloxanes,[16a] and hyperbranched polyether. [16b]…”

Crosslink‐Enhanced Emission Effect on Luminescence in Polymers: Advances and Perspectives

“…Similar luminescent phenomena were observed in other synthetic polymers, such as PEI, poly(amino ester)s, poly(ether amide)s, polyacrylonitrile, poly( N ‐vinylpyrrolidone), polyurea, poly( N ‐hydroxysuccinimide methacrylate), polysiloxanes, sulfonated acetone‐formaldehyde condensates, and even supramolecular assemblies.…”

Graphene oxide grafted by hyperbranched polysiloxane to enhance mechanical and frictional properties of epoxy resin

“…1. Firstly, A novel hyperbranched polysiloxane (HBPSi) containing primary amine, tertiary amine and hydroxyl groups was synthesized by transesterification [23,27,28] of APTES with MDEA.…”