Pressure‐Promoted Self‐Trapped Exciton Emission and White‐Light Harvesting in Lead Halide Metal–Organic Frameworks at Ambient Conditions

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 8, 2025

Abstract Lead halide metal−organic frameworks (MOFs) possess unique advantages in preparing single‐component white‐light‐emitting (WLE) materials due to their broadband emission based on self‐trapping excitons (STEs). However, order obtain high‐quality white light emission, challenges remain adjusting and optimizing the color temperature coordinates of STE emission. Herein, we have achieved tunable with Commission International de l'Eclairage (0.32, 0.38) 5777 K at ambient conditions TMOF‐8(Cl) through pressure treatment. The irreversible lattice distortion after treatment reduces distance between [PbCl] + unit TDC 2− unit. enhanced hydrogen bonding interactions electronic coupling Pb‐ s orbitals ligand energy levels turn charge transfer (CT) channel from Adjusting degree can achieve regulation relative intensity CT thereby obtaining This study provides a new perspective modulation MOFs platform for development WLE materials.

Language: Английский

Electrochemical Gating of Host–Guest Charge-Transfer Interactions Enabled by Viologen-like Functionality Engineered Metal–Organic Frameworks

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

Published: Feb. 19, 2025

Using electrochemically responsive metal-organic frameworks (MOFs) as host matrices to afford gating properties for functional guests is rather attractive but remains unexplored. Herein, a series of functionalized Zr-MOFs with viologen-like skeletons were created by engineering 2,2'-bipyridinium bay substitution different alkyl chains. Of the series, benefiting from enhanced rigidity, one bearing N,N'-ethylene bridge, UiO-67-EE, exhibited strongest electron deficiency due lowest LUMO level, thereby leading efficient transfer and favorable redox activity, which further endowed it outstanding electrochromic properties. More importantly, highly electron-deficient framework UiO-67-EE could allow accommodation electron-rich guest molecules through host-guest charge (CT) interactions. By leveraging electroresponsiveness functionality, served an adaptable platform controlled release capture control dynamic CT interactions upon stimuli alternate potentials. This smart electrochemical behavior systems was also monitored in real time distinguishable optical changes guests. Besides, exploited develop high-performance sensing platforms integrating molecular gate constructed target-aptamer complex.

Language: Английский

Boosting Fenton-like reaction via Enhanced Charge Transfer in Donor-Acceptor Polyaniline-like Conjugated Microporous Polymers

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: 378, P. 125530 - 125530

Published: May 25, 2025

Language: Английский