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Pressure treatment enables white-light emission in Zn-IPA MOF via asymmetrical metal-ligand chelate coordination.
Nat Commun
January 2025
State Key Laboratory of Superhard Materials, Synergetic Extreme Condition High-Pressure Science Center, College of Physics, Jilin University, Changchun, China.
Metal-organic frameworks that feature hybrid fluorescence and phosphorescence offer unique advantages in white-emitting communities based on their multiple emission centers and high exciton utilization. However, it poses a substantial challenge to realize superior white-light emission in single-component metal-organic frameworks without encapsulating varying chromophores or integrating multiple phosphor subunits. Here, we achieve a high-performance white-light emission with photoluminescence quantum yield of 81.
View Article and Find Full Text PDFA pseudo-cubic metal-organic cage with conformationally switchable faces for dynamically adaptive guest encapsulation.
Nat Chem
January 2025
Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK.
The creation of hosts capable of accommodating different guest molecules may enable these hosts to play useful roles in chemical purifications, among other applications. Metal-organic cages are excellent hosts for various guests, but they generally incorporate rigid structural units that hinder dynamic adaptation to specific guests. Here we report a conformationally adaptable pseudo-cubic cage that can dynamically increase its cavity volume to fit guests with differing sizes.
View Article and Find Full Text PDFDoes familiarity-detection flip attention inward? The familiarity-flip-of-attention account of the primacy effect in memory for repetitions.
Mem Cognit
January 2025
Department of Neurology, University of California Davis, Sacramento, CA, 95816, USA.
In cognitive psychology, research on attention is shifting from focusing primarily on how people orient toward stimuli in the environment toward instead examining how people orient internally toward memory representations. With this new shift the question arises: What factors in the environment send attention inward? A recent proposal is that one factor is cue familiarity-detection (Cleary, Irving & Mills, Cognitive Science, 47, e13274, 2023). Within this theoretical framework, we reinterpret a decades-old empirical pattern-a primacy effect in memory for repetitions-in a novel way.
View Article and Find Full Text PDFDramatic switchable polarities in conduction type and self-driven photocurrent of BiI via pressure engineering.
Natl Sci Rev
January 2025
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China.
The intentional manipulation of carrier characteristics serves as a fundamental principle underlying various energy-related and optoelectronic semiconductor technologies. However, achieving switchable and reversible control of the polarity within a single material to design optimized devices remains a significant challenge. Herein, we successfully achieved dramatic reversible p-n switching during the semiconductor‒semiconductor phase transition in BiI via pressure, accompanied by a substantial improvement in their photoelectric properties.
View Article and Find Full Text PDFLight-Triggered Reversible Assembly of Halide Perovskite Nanoplatelets.
Adv Mater
December 2024
Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741246, India.
Advancements in stimuli-driven nanoactuators necessitate the discovery of photo-switchable, self-contained semiconductor nanostructures capable of precise mechanical responses. The reversible assembly of 0D CsBiI halide perovskite nanoplatelets (NPLs) between stacked and scattered configurations are demonstrated under light and dark, respectively. This sunlight-triggered perpetual flipping of the NPLs, occurring in less than a minute, is associated with a color change between brown and red.
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