Related Experiment Video
Updated: May 17, 2025

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
Published on: May 12, 2023
An [Ag3(dppy)2(NO3)3] cluster polymer with narrowing fluorescence
Blessing D Peter1,2, Qiuhao Yi1,2, Chaonan Cui1
1Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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 [Ag3(dppy)2(NO3)3] cluster polymer through the reduction of AgNO3 with NaBH4 in a dark environment. This cluster polymer incorporates the coordination and passivation of both diminished nitro groups (NO3) and diphenyl-2-pyridylphosphine (dppy) ligands. The weak Ag-Ag metallic bonds within this cluster polymer are governed by argentophilic interactions, with each Ag3 unit connected by a NO3 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.
Related Concept Videos
Aggression
Agonism and Antagonism: Quantification
To quantify these effects, researchers use a dose-response curve, which provides valuable information about the potency and efficacy of a drug. Potency refers to...
Aggregates Classification
Petrographic classification groups aggregates based on common mineralogical characteristics. Some of the common mineral groups found in aggregates are...
Adrenergic Agonists: Indirect-Acting Agents
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral...
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
Diazonium Group Substitution: –OH and –H

