Facile preparation of silver nanocluster self-assemblies with aggregation-induced emission by equilibrium shifting

Nanoscale ◽  
2021 ◽  
Author(s):  
Lianyu Li ◽  
Weiyao Xi ◽  
Irshad Hussain ◽  
Meiling Chen ◽  
Bien Tan
Keyword(s):  
Self Assembly ◽  
Vibration Modes ◽  
Metal Nanoclusters ◽  
Aggregation Induced Emission ◽  
Silver Nanocluster ◽  
Metal Nanocluster ◽  
Facile Preparation

Aggregation-induced emission is a promising pathway to get high photoluminescence from metal nanocluster assemblies. Self-assembly of metal nanoclusters with regular morphologies can restrict the rotation and vibration modes of the...

scholarly journals Thiacalix[4]arene: New protection for metal nanoclusters

2016 ◽  
Vol 2 (8) ◽  
pp. e1600323 ◽  
Author(s):  
Zong-Jie Guan ◽  
Jiu-Lian Zeng ◽  
Zi-Ang Nan ◽  
Xian-Kai Wan ◽  
Yu-Mei Lin ◽  
...  
Keyword(s):  
Optical Properties ◽  
Silver Atom ◽  
Macrocyclic Ligands ◽  
Organic Ligands ◽  
Silver Nanoclusters ◽  
Metal Nanoclusters ◽  
Silver Nanocluster ◽  
Metal Nanocluster ◽  
Rigid Shell ◽  
Silver Core

Surface organic ligands are critical for the formation and properties of atomically precise metal nanoclusters. In contrast to the conventionally used protective ligands such as thiolates and phosphines, thiacalix[4]arene has been used in the synthesis of a silver nanocluster, [Ag35(H2L)2(L)(C≡CBut)16](SbF6)3, (H4L, p-tert-butylthiacalix[4]-arene). This is the first structurally determined calixarene-protected metal nanocluster. The chelating and macrocyclic effects make the thiacalix[4]arene a rigid shell that protects the silver core. Upon addition or removal of one silver atom, the Ag35 cluster can be transformed to Ag36 or Ag34 species, and the optical properties are changed accordingly. The successful use of thiacalixarene in the synthesis of well-defined silver nanoclusters suggests a bright future for metal nanoclusters protected by macrocyclic ligands.

scholarly journals Luminescent Hydrogel Based on Silver Nanocluster/Malic Acid and Its Composite Film for Highly Sensitive Detection of Fe3+

Gels ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 192
Author(s):  
Xiangkai Liu ◽  
Chunhui Li ◽  
Zhi Wang ◽  
Na Zhang ◽  
Ning Feng ◽  
...  
Keyword(s):  
Malic Acid ◽  
Self Assembly ◽  
Chemical Properties ◽  
Radiation Energy ◽  
Water Soluble ◽  
Pmma Film ◽  
Metal Nanoclusters ◽  
Silver Nanocluster ◽  
Ag Ncs ◽  
Highly Sensitive Detection

Metal nanoclusters (NCs) with excellent photoluminescence properties are an emerging functional material that have rich physical and chemical properties and broad application prospects. However, it is a challenging problem to construct such materials into complex ordered aggregates and cause aggregation-induced emission (AIE). In this article, we use the supramolecular self-assembly strategy to regulate a water-soluble, atomically precise Ag NCs (NH4)9[Ag9(C7H4SO2)9] (Ag9-NCs, [Ag9(mba)9], H2mba = 2-mercaptobenzoic acid) and L-malic acid (L–MA) to form a phosphorescent hydrogel with stable and bright luminescence, which is ascribed to AIE phenomenon. In this process, the AIE of Ag9-NCs could be attributed to the non-covalent interactions between L–MA and Ag9-NCs, which restrict the intramolecular vibration and rotation of ligands on the periphery of Ag9-NCs, thus inhibiting the ligand-related, non-radiative excited state relaxation and promoting radiation energy transfer. In addition, the fluorescent Ag9-NCs/L–MA xerogel was introduced into polymethylmethacrylate (PMMA) to form an excellently fluorescent film for sensing of Fe3+. Ag9-NCs/L–MA/PMMA film exhibits an excellent ability to recognize Fe3+ ion with high selectivity and a low detection limit of 0.3 μM. This research enriches self-assembly system for enhancing the AIE of metal NCs, and the prepared hybrid films will become good candidates for optical materials.

scholarly journals Self-Assembly of Metal Nanoclusters for Aggregation-Induced Emission

2019 ◽  
Vol 20 (8) ◽  
pp. 1891 ◽  
Author(s):  
Jianxing Wang ◽  
Xiangfang Lin ◽  
Tong Shu ◽  
Lei Su ◽  
Feng Liang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Self Assembly ◽  
The Self ◽  
Color Purity ◽  
Metal Nanoclusters ◽  
Aggregation Induced Emission ◽  
Synthetic Strategy ◽  
Emission Color ◽  
Optical Applications ◽  
First Time

Aggregation-induced emission (AIE) is an intriguing strategy to enhance the luminescence of metal nanoclusters (NCs). However, the morphologies of aggregated NCs are often irregular and inhomogeneous, leading to instability and poor color purity of the aggregations, which greatly limit their further potential in optical applications. Inspired by self-assembly techniques, manipulating metal NCs into well-defined architectures has achieved success. The self-assembled metal NCs often exhibit enhancing emission stability and intensity compared to the individually or randomly aggregated ones. Meanwhile, the emission color of metal NCs becomes tunable. In this review, we summarize the synthetic strategies involved in self-assembly of metal NCs for the first time. For each synthetic strategy, we describe the self-assembly mechanisms involved and the dependence of optical properties on the self-assembly. Finally, we outline the current challenges to and perspectives on the development of this area.

Size-tunable fluorescent dendrimersomes via aggregation-induced emission

2022 ◽  
Author(s):  
Marilyne Bélanger-Bouliga ◽  
Brandon Andrade-Gagnon ◽  
Diep Thi Hong Nguyen ◽  
Nazemi Ali
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Third Generation ◽  
Thermodynamic Control ◽  
Aggregation Induced Emission ◽  
Generation Number ◽  
Dendrimer Generation

Tetraphenylethylene-functionalized amphiphilic Janus dendrimers of up to third generation are synthesized. Their self-assembly has been studied under kinetic and thermodynamic control. By varying the dendrimer generation number and the self-assembly...

Novel chiral aggregation induced emission molecules: self-assembly, circularly polarized luminescence and copper(ii) ion detection

2018 ◽  
Vol 2 (10) ◽  
pp. 1884-1892 ◽  
Author(s):  
Guangxi Huang ◽  
Rongsen Wen ◽  
Zhiming Wang ◽  
Bing Shi Li ◽  
Ben Zhong Tang
Keyword(s):  
Self Assembly ◽  
Fluorescent Chemosensor ◽  
Chiral Molecules ◽  
Ion Detection ◽  
Circularly Polarized ◽  
Aggregation Induced Emission ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Two novel chiral molecules 1 and 2 were designed and synthesized. 1 displayed evident CPL activity, whereas 2 served as a highly selective and sensitive “turn-off” fluorescent chemosensor for Cu2+.

Visualizing the Initial Step of Self-Assembly and the Phase Transition by Stereogenic Amphiphiles with Aggregation-Induced Emission

ACS Nano ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. 839-846 ◽  
Author(s):  
Hui-Qing Peng ◽  
Bin Liu ◽  
Peifa Wei ◽  
Pengfei Zhang ◽  
Haoke Zhang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Self Assembly ◽  
Initial Step ◽  
Aggregation Induced Emission

Carbon nanopore and anchoring site–assisted general construction of encapsulated metal (Rh, Ru, Ir) nanoclusters for highly efficient hydrogen evolution in pH–universal electrolytes and natural seawater

2021 ◽  
Author(s):  
Rong Ding ◽  
Tingting Yan ◽  
Yi Wang ◽  
Yan Long ◽  
Guangyin Fan
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
General Construction ◽  
Natural Seawater ◽  
Metal Nanoclusters ◽  
Hydrogen Economy ◽  
Ligand Free ◽  
Metal Nanocluster ◽  
Substantial Interest ◽  
Free Metal

Metal–nanocluster–catalyzed hydrogen evolution through water splitting has received substantial interest toward the implementation of hydrogen economy. However, the general and efficient fabrication of well–defined and ligand–free metal nanoclusters (NCs) with...

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