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Linker Flexibility-Dependent Cluster Transformations and Cluster-Controlled Luminescence in Isostructural Silver
Jia-Yin Wang1, Ren-Wu Huang1, Zhong Wei1
1College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P.R. China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 12, 2019
Summary
Two new silver cluster-assembled materials (SCAMs) were synthesized. Triggering with acetonitrile induced structural transformations, leading to intense luminescence in these novel materials.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Nanotechnology
Background:
- Silver chalcogenolate clusters (SCCs) and silver cluster-assembled materials (SCAMs) are key luminescent materials.
- Luminescence in these materials is tunable via cluster nodes and linker species.
Purpose of the Study:
- Synthesize and characterize two isostructural 2D SCAMs using linkers with varying conformational freedom.
- Investigate the stimulus-responsive luminescence and structural transformation of these SCAMs.
Main Methods:
- Synthesis of two-dimensional silver cluster-assembled materials (SCAMs) using dodenuclear silver chalcogenolate clusters as secondary building units (SBUs).
- Characterization of structural transformations induced by acetonitrile (CH3CN) stimulus.
- Analysis of luminescence properties at room temperature and low temperature.
Main Results:
- Two isostructural 2D SCAMs, Ag12bpa and Ag12bpe, were successfully synthesized.
- Ag12bpa transformed into 1D Ag10bpa upon acetonitrile stimulation, exhibiting yellow phosphorescence.
- Ag12bpe transformed into a different 2D structure (Ag12bpe-1b) with red emission, and ligand exchange enabled intense luminescence.
Conclusions:
- Linker flexibility dictates structural transformation and luminescence in SCAMs.
- Demonstrated intelligent stimulus-responsive behavior in cluster-based metal-organic frameworks.
- Provided new insights into structure-luminescence relationships in novel luminescent materials.
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