Tailoring the luminescence of atomic clusters via ligand exchange reaction mediated post synthetic modification

2020 ◽  
Vol 22 (7) ◽  
pp. 3959-3964
Author(s):  
Srestha Basu ◽  
Chirantan Gayen ◽  
Santanu Dolai ◽  
Anumita Paul
Keyword(s):  
Exchange Reaction ◽  
Ligand Exchange ◽  
Gold Nanoclusters ◽  
Gold Clusters ◽  
Atomic Clusters ◽  
Luminescence Properties ◽  
Ligand Exchange Reaction ◽  
Technological Challenge

Modulation of luminescent characteristics of atomic gold clusters is an important technological challenge for broadening their futuristic applications. Post synthetic modification of histidine stabilized gold nanoclusters via ligand exchange reaction with cysteine is one such viable route towards modulation of the luminescence properties of gold nanoclusters.

scholarly journals Ligand exchange reactions on thiolate-protected gold nanoclusters

2021 ◽  
Author(s):  
Yanan Wang ◽  
Thomas Bürgi
Keyword(s):  
Exchange Reaction ◽  
Ligand Exchange ◽  
Gold Nanoclusters ◽  
Exchange Reactions ◽  
Ligand Exchange Reaction ◽  
Modification Method ◽  
Post Synthesis

As a versatile post-synthesis modification method, ligand exchange reaction exhibits great potential to extend the space of accessible nanoclusters. In this review, we sumarized this process for thiolate-protected gold nanoclusters....

scholarly journals Transformation from [Au25(SCH2CH2CH2CH3)18]0 to Au28(SCH2CH(CH3)Ph)21 gold nanoclusters: gentle conditions is enough

2019 ◽  
Vol 55 (99) ◽  
pp. 14914-14917 ◽  
Author(s):  
Yanan Wang ◽  
Belén Nieto-Ortega ◽  
Thomas Bürgi
Keyword(s):  
Exchange Reaction ◽  
Ligand Exchange ◽  
Gold Nanoclusters ◽  
Ligand Exchange Reaction ◽  
Mild Conditions

Herein we report the transformation of [Au25(SR)18]0 into Au28(SR)21 induced by ligand exchange reaction under mild conditions.

F−(H2O)+CH3I ligand exchange reaction dynamics

2020 ◽  
Vol 33 (2) ◽  
pp. 210-216
Author(s):  
Björn Bastian ◽  
Tim Michaelsen ◽  
Milan Ončák ◽  
Jennifer Meyer ◽  
Roland Wester
Keyword(s):  
Exchange Reaction ◽  
Ligand Exchange ◽  
Reaction Dynamics ◽  
Ligand Exchange Reaction

An all-in-one approach for synthesis and functionalization of nano colloidal gold with acetylacetone

2021 ◽  
Author(s):  
Li Zhang ◽  
Hongcen Zheng ◽  
Yonghai Gan ◽  
Bingdang Wu ◽  
Zhihao Chen ◽  
...  
Keyword(s):  
Exchange Reaction ◽  
Ligand Exchange ◽  
Fold Increase ◽  
Charge Transfer Complexes ◽  
Photochemical Property ◽  
Exchange Reactions ◽  
Ligand Exchange Reaction ◽  
Enhanced Photoluminescence ◽  
Good Imaging ◽  
Imaging Probes

Abstract Controllable synthesis, proper dispersion, and feasible functionalization are crucial requirements for the application of nanomaterials in many scenarios. Here, we report an all-in-one approach for the synthesis and functionalization of gold nanoparticles (AuNPs) with the simplest β-diketone, acetylacetone (AcAc). With this approach, the particle size of the resultant AuNPs was tunable by simply adjusting the light intensity or AcAc dosage. Moreover, owing to the capping role of AcAc, the resultant AuNPs could be stably dispersed in water for a year without obvious change in morphology and photochemical property. Formation of ligand to metal charge transfer complexes was found to play an important role in the redox conversion of Au with AcAc. Meanwhile, the moderate complexation ability enables the surface AcAc on the AuNPs to undergo ligand exchange reactions. With the aid of Ag+, the AuNPs underwent ligand exchange reaction with glutathione and exhibited enhanced photoluminescence (PL) with a maximum of 22-fold increase in PL intensity. The PL response was linear to the concentration of glutathione in the range of 0~500 μM. Such a ligand exchange reaction makes the obtained AuNPs being good imaging probes. To the best of our knowledge, this is the first work on illustrating the roles of AcAc as a multifunctional ligand in fabrication of NPs, which sheds new light on the surface modulation in synthesis of nanomaterials.

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