Atomic Engineering and Aggregation Effect to Regulate Synergistically Type I Reactive Oxygen Species of AIE‐Active Deep Red/Near Infrared Red Photosensitizer

Small, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract “Molecular science” has long been regarded as the golden rule to guide design of organic materials’ performances in past many years, but some interesting phenomena conventional aggregation‐caused fluorescence quenching and new aggregation‐induced emission reflect that properties would be changed from “molecule” “aggregate”. Therefore, “molecular theory faces certain limitations regulating performance materials at aggregation. In this work, it is discovered photosensitizer's contain reactive oxygen species, which could affected by changing molecular atoms aggregation form. The introduction selenium redshift improve species (ROS) efficiency. addition atomic effect, ROS efficiency photosensitizers after coating a polymeric shell, is, production type II singlet ( 1 O 2 ) suppressed, while I superoxide anion (O −• improved. This work discovers are relevant effect discussing deeply influence mechanism, important research significance for modulating precisely promoting development photodynamic therapy.

Язык: Английский

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Visible-to-UV photon upconversion in metal-free molecular aggregates based on glassy diphenylnaphthalene derivatives

Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(29), С. 10874 - 10878

Опубликована: Янв. 1, 2024

Visible-to-ultraviolet photon upconversion (UC) based on triplet–triplet annihilation was demonstrated in metal-free glassy solid films consisting of an organoboron photosensitizer and a diphenylnaphthalene-based emitter.

Язык: Английский

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Triplet–Triplet Annihilation Upconversion from Red to Blue Light Using a TADF Sensitizer Based Polymer

The Journal of Physical Chemistry B, Год журнала: 2024, Номер 128(37), С. 8997 - 9004

Опубликована: Сен. 4, 2024

Molecules capable of thermally activated delayed fluorescence (TADF) can exhibit triplet lifetimes on the order μs-ms as well low energy losses in intersystem crossing (ISC) process. As a result, they have great potential to be used sensitizers triplet-triplet annihilation upconversion (TTA-UC) systems with high anti-Stokes shifts, replacing traditional phosphorescent sensitizers. In this study, we employ red-absorbing boron difluoride curcuminoid-based TADF molecule sensitizer and 9,10-diphenylanthracene derivative annihilator. We polymerize them synthesize polymer-based red-to-blue TTA-UC system an shift up 182 nm (0.9 eV) photoluminescence quantum yield (PLQY) 0.77%. To our knowledge, is first report polymer containing photosensitizer. The properties were investigated through power-dependent experiments decay measurements. This work provides more detailed understanding polymers, highlights strength improving shifts systems, demonstrates feasibility building systems. development will expand application purely organic TTA-UC.

Язык: Английский

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Nonradiative Spin-Forbidden Decay Processes in π- and Multiresonance-Acceptor-Based TADF Molecules

The Journal of Physical Chemistry C, Год журнала: 2024, Номер 128(40), С. 16879 - 16891

Опубликована: Окт. 1, 2024

Язык: Английский

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