Inorganic Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
The synthesis of energetic BH 3 CN − anion polymers within the structure for propellant fuels aims to achieve high energy density, ultra-fast response, and unparalleled thermal stability in hypergolic materials.
Language: Английский
Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)
Published: Jan. 30, 2025
We report the synthesis of [Ag17(o1-CBT)12]3- abbreviated as Ag17, a stable 8e⁻ anionic cluster with unique Ag@Ag12@Ag4 core-shell structure, where o1-CBT is ortho-carborane-1-thiol. By substituting Ag atoms Au and/or Cu at specific sites we created isostructural clusters [AuAg16(o1-CBT)12]3- (AuAg16), [Ag13Cu4(o1-CBT)12]3- (Ag13Cu4) and [AuAg12Cu4(o1-CBT)12]3- (AuAg12Cu4). These substitutions make systematic modulation their structural electronic properties. show that preferentially occupies core, while localizes in tetrahedral shell, influencing stability diversity clusters. The band gap expands systematically (2.09 eV for Ag17 to 2.28 AuAg12Cu4), altering optical absorption emission. Ultrafast measurements reveal longer excited-state lifetimes Cu-containing clusters, highlighting effect heteroatom incorporation. results demonstrate tunable platform designing nanoclusters tailored properties, implications optoelectronics catalysis. Tuning structure composition atomically precise metal leads property changes which, however, are still poorly understood. Here, authors synthesize precisely substituted analogues study luminescence
Language: Английский
Citations
2
Accounts of Chemical Research, Journal Year: 2025, Volume and Issue: unknown
Published: March 28, 2025
ConspectusMetal nanoclusters, distinguished by their atom-precise structures and quantum size effect, are regarded as a crucial bridge between organometallic complexes plasmonic metal nanoparticles. These nanoclusters primarily composed of metallic core enveloped protective ligands, wherein the ligands play vital role in determining nanoclusters' synthesis, structural integrity, physicochemical properties. Considerable efforts ligand engineering have concentrated on exploring novel coordinating functional groups to advance nanocluster research, particularly precise controlled synthesis superatomic fine-tuning intrinsic properties, subsequent assembly application. However, backbone these seems equally important but attracts less attention. It is reasonable that if utility two moieties (coordinating group backbone) provokes profound synergistic contributions properties resultant extremely inestimable. In this context, carborane, with its spherical shape three-dimensional aromaticity (electronic effect), has emerged promising candidate for design. Over past decades, incorporation carborane into enabled construction various exhibiting distinct architectures, enhanced stability, unique reactivity. Therefore, it present current status challenges associated carboranyl ligand-protected guide future development. This Account provides comprehensive summary recent advances ligand-stabilized primary focus from our laboratory. We begin discussing advantages introducing carborane-based preparation, particular emphasis virtues heterometal-doped isostructural nanoclusters. Subsequently, we summarize strategies modification hierarchical elucidating how facilitates modulation specific promotes supramolecular covalent assembly. Furthermore, discuss cooperativity achieved framework broaden scope applications versatile fields, including hypergolic fuels, previously unexplored area. Finally, facing research nido-carborane or metallocarborane, fundamental understanding structure–property relationships, potential such boron neutron capture therapy radionuclide extraction. aims stimulate interest attributes corresponding among students researchers across diverse disciplines, chemistry, crystal engineering, materials science.
Language: Английский
Citations
1
Advanced Science, Journal Year: 2024, Volume and Issue: 11(23)
Published: April 3, 2024
Abstract Hypergolic propellants rely on fuel and oxidizer that spontaneously ignite upon contact, which fulfill a wide variety of mission roles in launch vehicles spacecraft. Energy‐rich carboranes are promising hypergolic fuels, but triggering their energy release is quite difficult because ultrastable aromatic cage structure. To steer the development carborane‐based high‐performance material, carboranylthiolated compounds integrated with atomically precise copper clusters presented, yielding two distinct isomers, Cu 14B‐S 14C‐S , both possessing similar ligands core structures. With migration thiolate groups from carbon atoms to boron atoms, ignition delay (ID) time shortened 6870 3 ms when contacted environmentally benign high‐test peroxide (HTP, H 2 O concentration 90%). The extraordinarily short ID ranking among best HTP‐active materials. experimental theoretical findings reveal benefitting groups, characterized by an electron‐rich metal kernel, displays enhanced reducibility superior charge transfer efficiency. This results exceptional activation rates HTP, consequently inducing carborane combustion simultaneous energy. fundamental investigation shed light advanced green propulsion systems.
Language: Английский
Citations
5
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 9, 2024
Laser ignition of primary explosives presents more reliable alternative to traditional electrical initiation methods. However, the commercial initiator lead azide (LA) requires a high-power density laser detonate, with minimum energy (E
Language: Английский
Citations
3
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: May 16, 2025
The development of novel high-performance hypergolic fuels is crucial for the advancement aerospace industry. Although hydride-containing compounds offer excellent combustion properties and a short ignition delay time, their inherent instability strong reducing nature have hindered widespread application. Herein, we report synthesis characterization an energetic, atomically precise copper hydride cluster, Cu11H3(5N-dpf)6(OAc)2, denoted as Cu11H3. This cluster exhibits exceptional performance good stability. When paired with high-test peroxide (HTP, >90% H2O2), Cu11H3 demonstrates time 16 ms achieves high specific impulse 254 s. Both experimental theoretical studies suggest that hydrides play pivotal role in process through interactions protons from H2O2, leading to hydrogen evolution accelerated combustion. research provides valuable insights design novel, environmentally benign solid propulsion applications.
Language: Английский
Citations
0
Inorganic Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
The synthesis of energetic BH 3 CN − anion polymers within the structure for propellant fuels aims to achieve high energy density, ultra-fast response, and unparalleled thermal stability in hypergolic materials.
Language: Английский
Citations
0