Highly intense NIR emissive CuPt bimetallic clusters featuring Pt(i)-Cu-Pt(i) sandwich kernel.

Metal nanoclusters (NCs) capable of near-infrared (NIR) photoluminescence (PL) are gaining increasing interest for their potential applications in bioimaging, cell labelling, and phototherapy. However, the limited quantum yield (QY) of NIR emission in metal NCs, especially those emitting beyond 800 nm, hinders their widespread applications. Herein, we present a bright NIR luminescence (PLQY up to 36.

Visible-Light-Driven NO Release from Postmodified MOFs via Photoinduced Electron Transfer for Antibacterial Application.

Photoresponsive nitric oxide (NO)-releasing materials (NORMs) enable the spatiotemporal delivery of NO to facilitate their potential applications in physiological conditions. Here two novel metal-organic frameworks (MOFs)-based photoactive NORMs achieved by the incorporation of prefunctionalized NO donors into the photosensitive Fe-MOFs via a postmodification strategy is reported. The modified Fe-MOFs display superior photoactivity of NO release when exposed to visible light (up to 720 nm).

Crystallographic Characterization of TiC@(5)-C, TiC@(8)-C, and TiC@(6)-C: Identification of Unsupported TiC Cluster with Cage-Dependent Configurations.

Fullerene cages are ideal hosts to encapsulate otherwise unstable metallic clusters to form endohedral metallofullerenes (EMFs). Herein, a novel TiC cluster with two titanium atoms bridged by a C-unit has been stabilized by three different fullerene cages to form TiC@(5)-C, TiC@(8)-C, and TiC@(6)-C, representing the first examples of unsupported titanium carbide clusters. Crystallographic results show that the configuration of the TiC cluster changes upon cage variation.

UO@C: Non-Isolated-Pentagon-Rule Cages Prevail with the UO Configuration Determined by Cage Shape and Dominated by Multicenter Bonds.

Endohedral clusterfullerenes (ECFs) are fullerene cages with various metallic clusters trapped inside. So far, the actinide-based ECFs are rather scarce with their possible structures and chemistry remaining largely unexplored. Herein, density functional theory calculations characterized that the recently synthesized UO@C could be UO@(17 490)-C or UO@(19 138)-C, whose cages have two or one pentagon adjacencies (PAs) and thus both violate the isolated pentagon rule (IPR).

Discovery of a Superatom inside the Fullerene Cage.

The stability of endohedral clusterfullerenes is generally understood in terms of the metal cluster shape, cage structure, and metal-cage interactions, with the electronic state of the internal cluster mostly neglected. Herein, theoretical calculations reveal that the (TiC) unit of recently synthesized TiC@(7)-C exhibits a superatomic state with a perfect closed-shell 1S1P1D electronic configuration in accordance with the famous jellium model. This "trapped superatom" features considerable aromaticity and hyperconjugation interactions never reported for other clusterfullerenes.