Unprecedented Multicolor Photoluminescence from Hyperbranched Poly(amino ester)s

Abstract

A novel kind of water‐soluble fluorescent hyperbranched poly(amino ester) (PAE) is prepared through a one‐pot polycondensation reaction of citric acid (CA) and N‐methyldiethanolamine (NMDEA). The PAE exhibits enhanced and red‐shift fluorescence with increasing solution concentration, showing distinct aggregation‐induced emission character. Interestingly, the resulting PAE exhibits tunable photoluminescence from blue, cyan, and green to red irradiated by altering the excitation wavelengths. Such unique emission of non‐conjugated PAE is attributed to the clustering of ester and tertiary amine groups derived from PAE self‐assembly aggregates. Moreover, the fluorescence of PAE is very sensitive to Fe3+ ions. The facile preparation and unique optical features make PAE potentially useful in numerous applications such as multicolor cellular imaging, Fe3+ ions probe, and light‐emitting diodes.

Fluorescent linear polyurea based on toluene diisocyanate: Easy preparation, broad emission and potential applications

“…the energy band gap is determined by the size and size distribution of a carbon nanomaterial, and emission is determined by this band gap. In contrast, EDE has been reported in a lessened extent for fluorescent polymers [21,23,[45][46][47][48][49][50]. Among those reported, a great part has been focused on those without conventional chromophores [4][5][6][45][46][47][48][49][50], namely non-traditional intrinsic luminescent polymers [5] or intrinsically fluorescent [4].…”

“…Among those reported, a great part has been focused on those without conventional chromophores [4][5][6][45][46][47][48][49][50], namely non-traditional intrinsic luminescent polymers [5] or intrinsically fluorescent [4]. For examples, EDE behavior was reported on poly(amino ester) and attributed to the cluster formation owing to the ester and tertiary amine groups, making n-π* electron transition possible from the tertiary amino to aggregated C = O [48]; Similar EDE was also reported on poly(maleic anhydridealt-vinyl pyrrolidone), and was ascribed to the intra-and/or interchain interactions between N and O atoms as the result of the aggregation or clustering of the polymer chains [49]. Up to date, a huge number of studies have been reported on diverse polymers, which contain heteroatoms (N, O, S, P etc.)…”

A clustering-triggered emission strategy for tunable multicolor persistent phosphorescence

“…[14][15][16][17][18][19][20] These features, fortunately, are exactly the two key points required for achieving unusual luminescence from nonconventional luminogens devoid of classic conjugates. [39][40][41][42][43] On account of the less effective delocalization of the subunits, individual non-conventional luminophores are virtually nonemissive. 39,[44][45][46][47][48][49] The clustering-triggered emission (CTE) mechanism was proposed to rationalize such photophysical properties.…”

Copolymerize Conventional Vinyl Monomers to Degradable and Water‐Soluble Copolymers with a Fluorescence Property

“…These results can be attributed to the formation of a complex between Fe 2+ /Fe 3+ and N and O of the polymer, which could lead to intramolecular charge transfer from the cation to the polymer. [ 42–44 ] These results suggest that the Ba 2+ , Fe 2+ , and Fe 3+ cations could be detected easily in aqueous solution by the prepared copolymer.…”