Visible to NIR‐II Photoluminescence of Atomically Precise Gold Nanoclusters

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(8)

Published: Nov. 3, 2023

Abstract Atomically precise gold nanoclusters (NCs) have emerged as a new class of precision materials and attracted wide interest in recent years. One the unique properties such pertains to their photoluminescence (PL), for it can widely span visible near‐infrared–I –II wavelengths (NIR‐I/II), even beyond 1700 nm by manipulating size, structure, composition. The current research efforts focus on structure–PL correlation development strategies raising PL quantum yields, which is nontrivial when moving from near‐infrared wavelengths, especially NIR–II regions. This review summarizes progress field, including i) types observed NCs fluorescence, phosphorescence, thermally activated delayed well dual emission; ii) some effective that are devised improve yield (QY) NCs, heterometal doping, surface rigidification, core phonon engineering, with double‐digit QYs NIR horizons; iii) applications luminescent bioimaging, photosensitization, optoelectronics. Finally, remaining challenges opportunities future highlighted.

Language: Английский

---

Photoluminescence Quenching of Hydrophobic Ag₂₉ Nanoclusters Caused by Molecular Decoupling during Aqueous Phase Transfer and EmissionRecovery through Supramolecular Recoupling

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(12)

Published: Jan. 9, 2024

Exploiting emissive hydrophobic nanoclusters for hydrophilic applications remains a challenge because of photoluminescence (PL) quenching during phase transfer. In addition, the mechanism underlying PL unclear. this study, PL-quenching was examined by analyzing atomically precise structures and optical properties surface-engineered Ag

Language: Английский

---

Arylgold nanoclusters: Phenyl-stabilized Au ₄₄ with thermal-controlled NIR single/dual-channel phosphorescence

Science Advances, Journal Year: 2024, Volume and Issue: 10(7)

Published: Feb. 14, 2024

Arylation of gold holds paramount importance in the domain organometallic chemistry; however, exploration arylgold nanoclusters remains its infancy primarily due to synthetic challenge. Here, we present a facile and effective arylation strategy directly synthesize two (

Language: Английский

---

Dynamic Near‐Infrared Circularly Polarized Luminescence Encoded by Transient Supramolecular Chiral Assemblies

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(32)

Published: May 13, 2024

Abstract Circularly polarized luminescence (CPL) is promising for applications in many fields. However, most systems involving CPL are within the visible range; near‐infrared (NIR) CPL‐active materials, especially those that exhibit high g lum values and can be controlled spatially temporally, rare. Herein, dynamic NIR‐CPL with a value of 2.5×10 −2 was achieved through supramolecular coassembly energy‐transfer strategies. The chiral assemblies formed by between adenosine triphosphate (ATP) pyrene derivative exhibited red signal ( 10 −3 ). further introduction sulfo‐cyanine5 resulted process, which not only led to NIR but also increased . Temporal control these realized introducing alkaline phosphatase fabricate biomimetic enzyme‐catalyzed network, allowing turned on. Based on enzyme‐regulated temporally controllable assemblies, multilevel information encryption system developed. This study provides pioneering example construction materials ability perform temporal via assembly strategy, expected aid design complex more closely resemble natural biological systems.

Language: Английский

---

Symmetrical and asymmetrical surface structure expansions of silver nanoclusters with atomic precision

Chemical Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The controlled symmetrical or asymmetrical surface structure expansion of metal nanoclusters has been accomplished at the atomic level.

Language: Английский

---

Solvent-Mediated Hetero/Homo-Phase Crystallization of Copper Nanoclusters and Superatomic Kernel-Related NIR Phosphorescence

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(15), P. 10767 - 10775

Published: April 9, 2024

Atomically precise superatomic copper nanoclusters (Cu NCs) have been the subject of immense interest for their intriguing structures and diverse properties; nonetheless, variable oxidation state ions complex solvation effects in wet synthesis systems pose significant challenges comprehending crystallization mechanism. Herein, we present a solvent-mediated approach two Cu NCs, namely, Cu26 pure-Cu(I) Cu16. They initially formed as hetero-phase then separated homo-phase via modulating binary solvent composition. In situ UV/vis absorption electrospray ionization mass spectra revealed that assembly was determined to be underlying mechanism hetero/homo-phase crystallization. is 2-electron superatom with kernel-shell structure includes [Cu20Se12]4– shell [Cu6]4+ kernel, containing 1S jellium electrons. Conversely, Cu16 Cu/Se nanocluster features [Cu16Se6]4+ core protected by extra dimercaptomaleonitrile ligands. Remarkably, exhibits unique near-infrared phosphorescence (NIR PH) at 933 nm due presence kernel-related charge transfer (3MM(Cu)CT). Overall, this work not only showcases NCs driven but also enables rare occurrence NIR PH within family.

Language: Английский

---

Chiral Ligand‐Concentration Mediating Asymmetric Transformations of Silver Nanoclusters: NIR‐II Circularly Polarized Phosphorescence Lighting

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(28)

Published: April 26, 2024

Abstract Near infrared (NIR) emitter with circularly polarized phosphorescence (CPP), known as NIR CPP, has emerged a key part in the research of cutting‐edge luminescent materials. However, it remains challenge to obtain nanoclusters CPP activity. Here, we propose an asymmetric transformation approach efficiently synthesize two pairs chiral silver ( R/S ‐Ag29 and ‐Ag16 ) using achiral Ag 10 nanocluster starting material presence different concentration inducer )‐1,1′‐binaphthyl‐2,2′‐diyl hydrogenphosphate ‐BNP). , formed low‐concentration ‐BNP, exhibits unique kernel‐shell structure consisting distorted 13 icosahedron integrated cage‐like organometallic shell C 3 symmetry, possesses superatomic 6‐electron configuration (1S 2 |1P 4 ). By contrast, high‐concentration features sandwich‐like pentagram I ‐pure kernel. Profiting from hierarchically structures kernel‐dominated phosphorescence, infrequent activity second near‐infrared (975 nm) region, being first instance NIR‐II observed among CPL‐active metal nanoclusters. This study presents new reduce difficulty de novo synthesis for nanomaterials, facilitates design CPP‐active region.

Language: Английский

---

Development of Stable Water‐Soluble Supratomic Silver Clusters Utilizing A Polyoxoniobate‐Protected Strategy: Giant Core‐Shell‐Type Ag₈@Nb₁₆₂ Fluorescent Nanocluster

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(29)

Published: May 7, 2024

Atomically precise low-nuclearity (n<10) silver nanoclusters (AgNCs) have garnered significant interest due to their size-dependent optical properties and diverse applications. However, synthesis has remained challenging, primarily inherent instability. The present study introduces a new feasible approach for clustering ions utilizing highly negative redox-inert polyoxoniobates (PONbs) as all-inorganic ligands. This strategy not only enables the creation of novel Ag-PONb composite but also facilitates stable AgNCs. Using this method, we successfully synthesized small octanuclear rhombic [Ag

Language: Английский

---

Structure and optical properties of an Ag135Cu60 nanocluster incorporating an Ag135 buckminsterfullerene-like topology

Nature Synthesis, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Language: Английский

---

Recent advances in synthesis and properties of silver nanoclusters

Nanoscale, Journal Year: 2024, Volume and Issue: 16(26), P. 12329 - 12344

Published: Jan. 1, 2024

Achieving atomic precision in nanostructured materials is essential for comprehending formation mechanisms and elucidating structure-property relationships. Within the realm of nanoscience technology, atomically precise ligand-protected noble metal nanoclusters (NCs) have emerged as a rapidly expanding area interest. These clusters manifest quantum confinement-induced optoelectronic, photophysical, chemical properties, along with remarkable catalytic capabilities. Among coinage metals, silver distinguishes itself fabrication stable nanoclusters, primarily due to its cost-effectiveness compared gold. This minireview provides an overview recent advancements since 2020 synthetic methodologies ligand selections toward attaining NCs boasting minimum two free valence electrons. Additionally, it explores strategies fine-tuning optical properties. The discussion extends surface reactivity, how exposure ligands, heat, light induces transformations size structure. Of paramount significance are applications reactions energy conversion, supplemented by in-depth mechanistic insights. Furthermore, review delineates challenges outlines future directions NC field, eye design new functional prospective diverse technologies, including optoelectronics, fine synthesis.

Language: Английский

---