Improving Pure Organic Room‐Temperature Phosphorescence by Substituent Effect of Thianthrene

Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Comprehensive Summary To gain insights into the potential of thianthrene (TA), its substituent effects were systematically studied on room‐temperature phosphorescence (RTP) properties, including electron‐donating and electron‐withdrawing substituents at 1‐ 2‐positions TA, respectively. Both theoretical experimental investigations show that 2‐position greatly enhance RTP performance than 1‐position substituents, while situation is exactly opposite for substituents. Compared with substitution, induce higher radiation rate lower non‐radiation rate, in favor enhancement efficiency. Furthermore, introduction phenylene substitution suppresses non‐radiation, resulting simultaneously improved efficiency elongated lifetime. Finally, using these materials, dynamically reversible operations information (write‐read‐erase) are realized, as well encryption time‐dependent decryption demonstration. This work not only provides a better understanding structure–property relationship TA‐based but also suggests an intramolecular structural modification strategy to improve pure organic materials.

Language: Английский

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Anion–π(–π) Interactions in Donor–Acceptor Hybrid Materials to Control Photochromism and Room-Temperature Phosphorescence

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Photochromic materials and room-temperature phosphorescence (RTP) are essential for applications in optoelectronics bioimaging. Organic–inorganic hybrid materials, particularly those exhibiting donor–acceptor (D–A) characteristics through supramolecular interactions, have shown significant potential to integrate both photochromic RTP properties. Among them, the anion–π π–π interactions been extensively studied; however, role of anion–π–π remains largely unexplored. This study investigated three naphthalenediimide-polyoxometalate (NDI-POM) hybrids: (H2DMAP-NDI)·(HPW12O40)·(NMP)2 (1), (HDMAP-NDI)2·(HPW12O40)·(NMP)2 (2), (HDMAP-NDI)2·(HPW12O40)·(NMP)7 (3), focusing on impact their The results indicate that 1 exhibits fastest photoresponse highest quantum yield, primarily driven by interactions. Hybrid 2, which involves shows slower photochromism lower yield due exciton localization nonradiative decay paths resulting from stacking. 3, characterized excessively strong is unstable nonemissive. provides valuable insights into offers a framework designing advanced photoresponsive with tunable properties diverse applications.

Language: Английский

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Photophysical Analysis of Prolonged UV Irradiation-Induced Delayed Luminescence of Semi-Aromatic Polyimides and Its Relation to Oxygen Permeability

Polymer, Journal Year: 2025, Volume and Issue: unknown, P. 128425 - 128425

Published: April 1, 2025

Language: Английский

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High Performance of Phosphorescence Materials with Excellent Photo-damage Tolerance and Their Application in Time-Resolved Information Protection and Temperature Sensitivity

Dyes and Pigments, Journal Year: 2025, Volume and Issue: unknown, P. 112876 - 112876

Published: May 1, 2025

Language: Английский

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