Copper(I)-Iodide Clusters as Carriers for Regulating and Visualizing Release of Aroma Molecules

Abstract

Achieving the controlled release of functional substances is indispensable in many aspects of life. Especially for the aroma molecules, their effective delivery of flavor and fragrance is challenging. Here, selected pyridines, as highly volatile odorants, were individually coordinated with copper(I) iodide (CuII) via a straightforward one-pot synthesis method, rapidly forming pure or even crystalline CuII cluster-based profragrances at room temperature. The obtained profragrances enabled the stable and high loading of volatile fragrances under ambient conditions and guaranteed their long-lasting release during heating. Furthermore, the intrinsic emission luminescence of these solid-state profragrances decayed along with the aroma release, which can serve as an additional indicator for monitoring the delivery process. This research sets a precedent for using CuII clusters as dual-purpose release agents and greatly expands their potential applications.

A Critical Review on Room‐Temperature Sodium‐Sulfur Batteries: From Research Advances to Practical Perspectives

“…It is worth noting that, besides accommodating Na metal in the integrated porous host materials, dispersing functional nanomaterials in Na metal has also been proved to be effective for enhancing the cycling stability of the Na metal anodes. [ 103 ] For example, Mitlin and coworkers reported a metallurgical composite of Na 2 (Sb 2/6 Te 3/6 Vac 1/6 ) dispersed in Na metal as anode, which delivered a high Coulombic efficiency of 99.4% for 1000 h with 100% DOD. It also enabled stable cycling of anode‐free full cells for 100 cycles with a slow capacity decay of 0.23% per cycle, suggesting the excellent cycling stability of the metallurgical composite anode.…”

Preparation and Application of Thin‐Sodium Metal

“…Composite-supporting structure Anode 50 [35] Composite-supporting structure Anode 80 [36] Composite-supporting structure Anode 200 [38] Alloying Anode 100 [45] Alloying Anode 100 [46] Alloying Anode 76.5 [48] Interface design Anode 100 [60] can greatly improve battery stability. Xiancheng Wang et al [36] prepared thin-sodium metals with a thickness of 80 μm by embedding NaNO 3 in bare Na metal matrix by mechanical kneading, as shown in Figure 2b.…”

“…[40][41][42][43] Also, Na alloys can suppress the side reaction between the electrolytes and the metal anode to achieve stable cycling life span, compared with the pure Na. [7,43,44] In recent works, Liu et al [45] used the mesoporous carbon (MPC) powder and sodium metal to prepare the sodium alloy anodes with a thickness of 100 μm by rolling technology shown in Figure 4a, which can effectively reduce the viscosity of sodium metal and improve the strength and hardness. Due to the introduction of second-phase carbon particles into the sodium metal, the obtained "carbon in metal" (CiM) anode has a higher hardness (65 HA) compared to bare Na metal (21 HA).…”

“…Reproduced with permission. [ 45 ] Copyright 2023, American Chemical Society. b) Schematic diagram of preparing composite thin‐sodium metal negative electrode by alloy melting method.…”

Constructing sodiophilic interconnected ion-transport channels towards a stable Na-metal anode

“…20 The optimized anode ensured uniform sodium ion nucleation and rapid ion migration within the bulk metal, contributing to a dendrite-free Na morphology. Some reported electrode materials, including graphite, 21 activated carbon, 22 carbon nanotubes (CNTs), 23 hard carbon, 24 MoS 2 (ref. 25) and montmorillonite, 26 have been conrmed to be benecial for restraining the dendrite growth of the metal anode.…”