Full-Color Emissive Poly(Ethylene Oxide) Electrospun Nanofibers Containing a Single Hyperbranched Conjugated Polymer for Large-Scale, Flexible Light-Emitting Sheets

Abstract

White-light-emitting protocols based on organic materials have received much attention in the academic and industrial fields because of their potential applications in full-color displays and back-lighting units for liquid crystal displays. Here, the attempt is made to fabricate white-light-emitting, electrospun poly(ethylene oxide) (PEO) sheets containing controlled concentrations of a single light-emitting material composed of a type of hyperbranched conjugated polymer (HCP). The HCPs used here have the unique property of exhibiting a variety of fluorescence colors in the electrospun matrix that is caused by the different distances between HCP chains depending on their concentrations, leading to different degrees of intermolecular energy transfer. Therefore, the emission colors of the PEO sheets can be easily manipulated by simply varying the HCP concentrations in the PEO matrix. The resulting method for fabricating nanofibers comprising light-emitting materials in the polymer matrix has great potential for easy fabrication of cost-effective, flexible light-emitting system.

Fluorescence Emission of Polyethylenimine-Derived Polymer Dots and Its Application to Detect Copper and Hypochlorite Ions

“…Conjugated polymer dots (CPDs) have the advantages of high fluorescence intensities, excellent photophysical properties, multicolor fluorescence, a clear luminescence mechanism, and widespread application. However, CPDs still have several non-negligible disadvantages due to their preparation and application, such as complicated multistep synthesis routes, the use of environmentally harmful organic solvents, poor water solubilities, and high toxicities. − Therefore, it is necessary to functionally modify CPDs to enhance their water solubility and decrease their toxicity for practical applications, such as chemical sensing and biological analysis. At present, researchers continue to develop polymer dots that are facile to synthesize and environmentally friendly.…”

Facile preparation of fluorescent water-soluble non-conjugated polymer dots and fabricating an acetylcholinesterase biosensor

“…Nonetheless, there are still several irreplaceable drawbacks, such as complicated multistep synthesis routes, using environmentally detrimental organic solvents, insolubility, and high toxicity. [18][19][20][21] Non-conjugated polymer dots (NCPDs), having aggregated polymer structures, are different from CPDs stemming from their assembly of uorescent conjugated polymers. 22 NCPDs with an aggregated or cross-linked polymer structure contain autochromophores or unconventional chromophores, such as aliphatic tertiary amine, carbonyl, ester, and amide (C] O, C]N, C]S), [23][24][25] and are prepared by dehydration, condensation, carbonization or assembly routes.…”

Facile synthesis of hyperbranched poly(p‐phenyleneethynylene‐alt‐m‐phenyleneethynylene) with narrow dispersity and high branching degree by sonogashira polymerization of an AB2 monomer

“…1 The global molecular shape can also induce efficient intramolecular energy transfer. [2][3][4] Hyperbranched conjugated polymers have attracted considerable attention as novel materials in the fields of light emitting, [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] solar cells, [24][25][26] fluorescent chemosensors, [27][28][29][30][31][32] and so on.…”