Color‐tunable and bright nonconjugated fluorescent polymer dots and fast photodegradation of dyes under visible light

Abstract

Nonconjugated polymer dots (PDs) without largely conjugated structures entitle their advantages such as environment friendliness, nontoxicity, and intrinsic fluorescence. However, color-tunable PDs remain a challenge. Herein, polyvinyl pyrrolidone (PVP) and ascorbic acid (AA) are used to synthesize nonconjugated PDs, namely, PA PDs with intensive blue emission. The introduction of a third component, m-phenylenediamine (MPD), redshifted the emission to green. The asprepared color-tunable blue to green emissive PDs exhibit excellent properties, whether in solution or in solid state, originated from the mechanism of clusteringtriggered emission (CTE) induced by the overlap of electron-rich atoms, the strong inter/intrachain interaction. The quantum yields of blue and green PDs reached up to 15.07% and 28.22%, respectively. Furthermore, PA PDs were successfully applied to the highly efficient photocatalytic degradation for dyes: methylene blue (MB) and methyl orange (MO) were degraded by 89.9% and 93.8% within 20 min under visible light, respectively.

Enhanced Perovskite Photovoltaics with Non-conjugated Polymers: Recent Developments and Future Prospects

“…Additionally, NCPs could function as effective CTMs, primarily hole transport materials (HTM) in organic electronic devices like solar cells and light-emitting diodes . Their presence enhances charge extraction and efficient transport.…”

“…Additionally, NCPs could function as effective CTMs, primarily hole transport materials (HTM) in organic electronic devices like solar cells and light-emitting diodes. 31 Their presence enhances charge extraction and efficient transport. Moreover, certain NCPs can function as effective barrier materials, safeguarding against the influence of moisture, oxygen, and other environmental factors.…”

Recent Advances in Fluorescent Polymers with Color-Tunable Aggregate Emission

“…These materials commonly feature nonconjugated structures, and through-space interactions were proposed as the key attribute governing luminescence within this material class. They often exhibit clusterization-triggered emission (CTE) behaviors, the phenomenon termed “clusteroluminescence”. , Accordingly, polymerization represents an effective approach for achieving NTIL/CTE properties while affording control over color tunability . This strategy, coined polymerization-induced emission, provides a new perspective for generating emissive polymers from unconventional and initially nonemissive groups …”

Tunable emission in the visible range from a single organic fluorophore through time-controlled morphological evolution

“…30 It has also been shown that alkyl chain-dependent microstructures and self-assembled aggregates produce various emission colors in solution. [31][32][33][34][35][36][37] The fabrication of luminescent materials with adjustable emission color by self-assembly of p-conjugated molecules has attracted particular attention. In the literature, 38 a thiophene-based a-cyanostyrene derivative was observed to form nanoparticles with a bright fluorescence when self-assembled by adding water to an organic solution (THF or DMSO).…”