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Anion-Templated Nanosized Silver Alkynyl Clusters: Cluster Engineering and Solution Behavior.

Shan-Shan Zhang1, Hai-Feng Su2, Zhi Wang1

  • 1Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 18, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces cluster engineering for controllable assembly of silver alkynyl clusters. Researchers demonstrated template effects using different anions to create novel polynuclear silver structures with diverse architectures.

Keywords:
anion templatecluster engineeringsilversolution behavior

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Area of Science:

  • Coordination Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Assembling nanosized polynuclear metal clusters from simple building blocks is challenging due to complex self-organization processes.
  • Developing controllable methods for synthesizing these clusters is crucial for advancing materials science and nanotechnology.

Purpose of the Study:

  • To demonstrate the cluster engineering concept for the controllable assembly of polynuclear silver alkynyl clusters.
  • To exemplify the template effects of hetero and homo anions in cluster formation.
  • To provide a controllable method for achieving the assembly of silver alkynyl clusters with diverse structures.

Main Methods:

  • Synthesis and single-crystal structural characterization of four novel molecular assemblies based on nanosized silver alkynyl clusters.
  • Utilizing concomitant chromate (CrO4^2-) and chloride (Cl-) templates to isolate discrete and polymeric silver clusters.
  • Employing a one-pot reaction with a sole chromate (CrO4^2-) template to simultaneously isolate different cluster structures.
  • High-resolution electrospray ionization mass spectrometry (HR-ESI-MS) to investigate the solution behaviors of the synthesized clusters.

Main Results:

  • Successfully synthesized and characterized four molecular assemblies: {[(CrO4)2Cl@Ag42(PhC≡C)34(CF3COO)2]·CF3COO} (1), {(NH4)[(CrO4)2Cl@Ag42(PhC≡C)34(CrO4)(H2O)2]·2BF4·CH3OH}n (2), [(CrO4)@Ag22(PhC≡C)16(CF3SO3)4]n (3), and {[(CrO4)2@Ag31(PhC≡C)22(CF3SO3)4]·CF3SO3·2CH3OH·H2O}n (4).
  • Demonstrated controllable assembly of discrete (1) and polymeric (2) structures using different silver salts in the presence of CrO4^2- and Cl- templates, both featuring a similar Ag42 metallic cage.
  • Achieved simultaneous isolation of 1D chain structures (3 and 4) using a sole CrO4^2- template, based on Ag18 and Ag30 clusters templated by single and double CrO4^2- anions, respectively.
  • Investigated the solution behaviors of clusters 1-4 using HR-ESI-MS.

Conclusions:

  • The cluster engineering concept provides a viable strategy for the controlled synthesis of complex polynuclear silver alkynyl clusters.
  • Anion templates play a critical role in directing the assembly and determining the final structures of these silver clusters.
  • This work offers a controllable pathway for the rational design and assembly of diverse silver alkynyl cluster architectures.