Work

An [Ag3(dppy)2(NO3)3]n cluster polymer with narrowing fluorescence

Year: 2025

Type: article

Abstract: Low-dimensional nanomaterials with lattice confinement, including those of nanoclusters (NCs), offer benefits for fluorescence narrowing. Compared to quantum dots of metal NCs, however, one-dimensional structures of such NCs challenge the single-crystal synthesis. Here, we report the synthesis of a novel [ Ag 3 (dppy) 2 (NO 3 ) 3 ] n cluster polymer through the reduction of AgNO 3 with NaBH 4 in a dark environment. This cluster polymer incorporates the coordination and passivation of both diminished nitro groups (NO 3 ) and diphenyl-2-pyridylphosphine (dppy) ligands. The weak Ag-Ag metallic bonds within this cluster polymer are governed by argentophilic interactions, with each Ag 3 unit connected by a NO 3 group. This cluster polymer exhibits photoluminescence with three emission bands at 308, 352, and 620 nm, aligned with the purple (308/352 nm) and red (620 nm) regions, respectively. We synthesized microfibers of this cluster polymer using reprecipitation, resulting in a fluorescence bandwidth reduction to approximately one-tenth in the microfiber samples relative to the diluted solution. • We report an innovative strategy in synthesizing a novel [ Ag 3 (dppy) 2 (NO 3 ) 3 ] n cluster polymer • The [ Ag 3 (dppy) 2 (NO 3 ) 3 ] n cluster polymer demonstrates multicolor emissions • We have synthesized microfibers of this cluster polymer by a facile precipitation technique • The microfibers of this cluster polymer exhibit significant fluorescence emission narrowing Nanocomplex; Chemical synthesis; Nanomaterials; Optical property

Source: iScience

DOI: 10.1016/j.isci.2025.111982

Authors: Blessing D. Peter, Qiuhao Yi, Chaonan Cui, Andrea Biffis, Jiannian Yao, Zhixun Luo