Dispersing hydrophobic copper nanoclusters in aqueous solutions triggered by polyoxometalate with aggregation-induced eimission properties

Wang, Zhicheng; Zhang, Shanshan; Xie, Huiyan; Sun, Di; Wang, Wenjuan; Li, Shulin; Xin, Xia

doi:10.1016/j.colsurfa.2023.131147

Cited by 2 publications

(1 citation statement)

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“…31 The self-assembly process not only constrains the charge/energy transfer of ligands but also enhances the metallophilic interactions (aurophilic, argentophilic, and coprophilic) which proves to be an effective strategy in achieving AIE. Solvent plays a prominent role 32,33 in inducing self-assembly and AIE. Under the influence of solvophobic interactions, metal NCs spontaneously aggregate, once the degree of aggregation reaches a sufficient level, AIE can occur.…”

Section: ■ Introductionmentioning

confidence: 99%

Solvent-Induced Self-Assembly of Silver Nanoclusters for White-Light-Emitting Diodes and Temperature Sensing

Xie,

Wang,

Zhang

et al. 2023

ACS Appl. Nano Mater.

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Silver nanoclusters (Ag NCs), as a kind of luminescent material, have been widely studied due to their advantages of precise atomic structure, low toxicity, excellent photostability, and biocompatibility. However, studies on the preparation of hydrophilic Ag NCs with a strong fluorescence intensity and high quantum yield (QY) are rare. In this study, the atomically precise Ag NCs with six silver atoms as core (Ag 6 −NCs) were self-assembled under the induction of a good solvent (water) and a poor solvent N-methyl-2-pyrrolidone (NMP). By limiting the rotation and vibration of Ag 6 −NCs ligands, and accompanied by the ligand-to-metal charge transfer (LMCT), aggregation-induced emission (AIE) occurred, and the strong fluorescence emission of Ag 6 −NCs/NMP/H 2 O assembly was realized through solvophobic interactions and noncovalent interactions, such as hydrogen-bonding interactions and π−π staking. Compared with the original Ag 6 −NCs, the fluorescence lifetime of Ag 6 −NCs/NMP/H 2 O was extended from 0.56 to 11.77 μs, the QY was increased from 2.3 to 17.6%, and its photoluminescence (PL) intensity was enhanced 37-fold to the order of 10 7 . Long lifetime and large Stokes shift (∼165 nm) indicate that the Ag 6 −NCs/NMP/H 2 O assembly was a phosphorescent emitter. This research demonstrates that the excellent optical properties and regular response to temperature of the Ag 6 −NCs/NMP/H 2 O assembly make it possible to fabricate white-light-emitting diodes (WLEDs) or temperature sensing materials.

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Section: ■ Introductionmentioning

confidence: 99%