Low Optical Loss and Bent Waveguides: Crystals of a One-Dimensional Pt₁Ag₁₄ Nanocluster

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Photoluminescent nanoclusters are promising materials for optical waveguides. However, their photon transmission under mechanical stress is very challenging. Here, we report an low-loss metallic nanocluster crystal, [Pt1Ag14(DPPP)6Cl4](SbF6)2 (DPPP = 1,3-bis(diphenylphosphino) propane), which exhibits stable performance with loss coefficient of 7.15 × 10–4 dB·μm–1─lower than most reported inorganic, organic, and hybrid materials. The Pt1Ag14 crystals maintain excellent stability deformation, difference only 0.15 10–3 dB·μm–1 before after stress. Reasonable molecular design endows robust flexibility, resulting in bending radius being smaller that similar structures. Structural analysis has shown multiple π···π, C–H···π, C–H···F intra- intermolecular interactions originating from the ligands between counterions ensure crystal Metallic low flexibility generated by rational offer candidates fields active waveguides flexible electronic

Language: Английский

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Superlattice Assembly for Empowering Metal Nanoclusters

Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: 57(21), P. 3194 - 3205

Published: Oct. 7, 2024

ConspectusAtomically precise metal nanoclusters, serving as an aggregation state of atoms, display unique physicochemical properties owing to their ultrasmall sizes with discrete electronic energy levels and strong quantum size effects. Such intriguing endow nanoclusters potential utilization efficient nanomaterials in catalysis, electron transfer, drug delivery, photothermal conversion, optical control, etc. With the assistance atomically operations theoretical calculations on significant progress has been accomplished illustrating structure-performance correlations at single-molecule level. research achievements, turn, have contributed rational design customization functional cluster-based nanomaterials.Most previous studies focused investigating structure-property nanocluster monomers, while exploration structures hierarchical assembled was far from enough. Indeed, application aspect, controllably assembly states (e.g., crystalline materials, host-guest hybrid amorphous powders, so on) were more suitable for performance expression relative those monomeric directed downstream solid-state applications. In this context, attention should be paid state-correlated property variations occurring aggregating assembling processes better applications accordance aptitude.Crystalline aggregates are crucial structural determination also acting a cornerstone analyze by affording atomic-level information. The regular arrangement, uniform composition, close intermolecular distance cluster molecules supercrystal lattices beneficial retention amplification molecule itself state. Besides, these nanoparticles effects, intercluster distances still located nanoscale level, wherein effect is highly likely take additional synergistic Accordingly, it expected that novel performances might occur completely different monomolecular state.In Account, we emphasize our efforts exploring enhancement aggregate states, such thermal stability, photoluminescence, activity, waveguide. enhancements further supported practical uses structure determination, polarization switch, waveguide device, on. We demonstrated differences between monomers attributed change during superlattice. "superlattice assembly" intended customize function

Language: Английский

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Pressure-Driven Circularly Polarized Luminescence Enhancement and Chirality Amplification

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Achieving ultrahigh-color-purity circularly polarized luminescence (CPL) in low-dimensional chiral perovskites is challenging due to strong electron–phonon coupling caused by lead halide octahedral distortion. Herein, the piezoluminescence behaviors of six novel perovskites, (S/R-3-XPEA)2PbBr4 (PEA = phenethylamine; X F, Cl, Br), were systematically investigated. Upon compression, (S/R-3-ClPEA)2PbBr4 exhibits significant piezofluorochromic behaviors, transforming from yellow CPL deep-blue CPL. At 2.5 GPa, intensity increases an order magnitude and its asymmetry factors (glum) are amplified initial ±0.03 ±0.1. (S/R-3-BrPEA)2PbBr4 presents a similar piezochromic response, realizing at 1.7 while (S/R-3-FPEA)2PbBr4 retains under high pressure. High-pressure structural characterization theoretical calculations confirm that pressure-enhanced halogen bonds reduce penetration depth S/R-3-BrPEA+ S/R-3-ClPEA+ into [PbBr6]4– frameworks, significantly suppressing increasing magnetic transition dipole moment (S/R-3-ClPEA)2PbBr4, which responsible for ultrahigh-purity chirality amplification, respectively.

Language: Английский

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Luminescent Metal Nanoclusters and Their Application in Bioimaging

Nanoscale, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

This review focuses on the structure–property correlation and bioimaging application of luminescent metal nanoclusters, which feature atomically precise structures, diverse optical properties excellent biocompatibility.

Language: Английский

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