Highly emissive poly(maleic anhydride-alt-vinyl pyrrolidone) with molecular weight-dependent and excitation-dependent fluorescence

Abstract

Nonconventional poly(maleic anhydride-alt-vinyl pyrrolidone) copolymers exhibit distinct AIE characteristics, as well as molecular weight-dependent and excitation-dependent fluorescence. They can emit blue to red colours under different excitation wavelengths.

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.…”

Enhancing Photoluminescence of Nonconventional Luminescent Polymers by Increasing Chain Flexibility

“…We have also measured the molecular weights ( M n ) of PITA and POITA, which are 6.61 × 10 4 and 1.22 × 10 4 , and the polydispersity indices of them are 1.79 and 1.4, respectively. With consideration to the molecular‐dependent fluorescence of PMVP observed in our previous study, POITA with a lower molecular weight might be more prone to aggregate into more clusters that enable the stronger inter‐ or intra‐chain interactions and hence stronger emissions.…”

“…More recently, an increasing number of nonconventional luminescent polymers that do not contain amine moieties are found to be luminescent. Most of them contain carbonyl (CO) groups in the form of anhydride, ester, amide, and imide, such as poly[(maleic anhydride)‐ alt ‐(vinyl acetate)] (PMV), poly(maleic anhydride‐ alt ‐vinyl pyrrolidone) (PMVP), polyisobutene succinic anhydrides (PIBSA), oligo(maleic anhydride) (OMAh), poly( N ‐hydroxysuccinimide methacrylate) (PNHSMA), polyurethanes (PU), poly(ethylene terephthalate) (PET), and sulfonated acetone–formaldehyde (SAF) condensates . Some other polymers like polysiloxanes containing unconjugated CC double bonds and hydroxyl (OH) groups, polyacrylonitrile (PAN), and hyperbranched polyether epoxy (HBPEE) are also found to be luminescent.…”

Color Tuning in the Luminescence of Two Oligomers Derived from N,N′-(Naphthalenediyl)bis-phenylimine Containing Oligomers

“…It was found that the length of the polymer chain plays an important role in the solid-state emission. e molecular architecture of the polymers facilitates the formation of more conformations with potentially strong intra-and/or interchain interactions leading to red-shifted and even decreased emissions [54,55] to increasing MW parameters. Not unexpectedly, PLQY measured on the thin film of neat NPh5 (18%; see Table 1) is lower than the one of neat NPh2 thin films (45%) confirming structural factors influencing the aggregation structures.…”