Highly Bright Pure Room Temperature Phosphorescence for Circularly Polarized Organic Hyperafterglow DOI Open Access
Jingyu Zhang, Shuman Zhang, Chengxi Sun

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract Pure room‐temperature phosphorescence (pRTP) promises great advantages in both exciton utilization and lifetime manipulation over existing organic luminophores for a variety of emerging applications, but the low brightness, efficiency, color purity constrain afterglow luminescence significantly. Here, promising approach to design highly bright, efficient, narrowband pRTP with long‐lifetime hyperafterglow is proposed by isolating conjugated energy donor circularly polarized (CP) acceptor multi‐resonance effect into rigid host. It shown that aggregation chiral P‐containing binaphthyl promotes generation CP‐pRTP high brightness up ≈50 cd m −2 , while simultaneous transfer chirality afford multi‐color photoluminescence efficiency ≈90%, full‐width at half maxima 31–39 nm, 120–770 ms, luminescent dissymmetry ≈10 −3 . Also, excellent stability capable resisting quenching effects oxygen, solvents, aqueous solutions strong acids bases are observed. With these advantages, applications information encryption, grayscale imaging, 3D high‐resolution models realized, promoting significantly fundamental understandings on modulation construction high‐performance materials advanced photophysical properties applications.

Язык: Английский

Solvent‐Free Supramolecular Polymerization for Feather‐Like Nanostructured Chiral Fluorescent Polyurethanes with Multimodal Chiroptical Stimuli Responsiveness DOI Creative Commons
Huimin Duan, Shuli Li, Xinlei Wu

и другие.

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Фев. 28, 2025

Abstract Chiral supramolecular polymers with stimuli‐responsive circularly polarized luminescence (CPL) are highly desirable for smart flexible optoelectronic devices, but remain rarely reported. Here, a simple solvent‐free polymerization preparing chiral polyurethanes is presented by in situ induced self‐assembly strategy, using cellulose nanocrystals (CNCs)‐based isocyanate prepolymers and macromolecular polyols as precursors, achieving precise control over polymer chain assembly spot‐like arrangement. More importantly, further incorporating π‐conjugated luminescent dihydroxynaphthalene molecule, CPL‐active polyurethane films feather‐like nanostructures constructed, which promote the ordered arrangement of CNCs‐based segments due to increased spatial resistance. The π─H bond network between CNCs urethane‐linked benzene rings drives self‐assembly, enabling higher‐level amplification enhanced fluorescence. Interestingly, prepared fluorescent display multimodal chiroptical stimuli responsiveness under various stimuli, such temperature, solvent polarity, pH, light, sensitivity network. This work offers new insights into designing significant potentials.

Язык: Английский

Процитировано

0
Highly Bright Pure Room Temperature Phosphorescence for Circularly Polarized Organic Hyperafterglow DOI Open Access
Jingyu Zhang, Shuman Zhang, Chengxi Sun

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract Pure room‐temperature phosphorescence (pRTP) promises great advantages in both exciton utilization and lifetime manipulation over existing organic luminophores for a variety of emerging applications, but the low brightness, efficiency, color purity constrain afterglow luminescence significantly. Here, promising approach to design highly bright, efficient, narrowband pRTP with long‐lifetime hyperafterglow is proposed by isolating conjugated energy donor circularly polarized (CP) acceptor multi‐resonance effect into rigid host. It shown that aggregation chiral P‐containing binaphthyl promotes generation CP‐pRTP high brightness up ≈50 cd m −2 , while simultaneous transfer chirality afford multi‐color photoluminescence efficiency ≈90%, full‐width at half maxima 31–39 nm, 120–770 ms, luminescent dissymmetry ≈10 −3 . Also, excellent stability capable resisting quenching effects oxygen, solvents, aqueous solutions strong acids bases are observed. With these advantages, applications information encryption, grayscale imaging, 3D high‐resolution models realized, promoting significantly fundamental understandings on modulation construction high‐performance materials advanced photophysical properties applications.

Язык: Английский

Процитировано

0