研究目的
Investigating the structural transformations, piezochromic luminescence, photocurrent responses, and photocatalytic properties of 2-D silver-thiocyanate layers directed by viologens under low pressure stimuli.
研究成果
Seven viologen/silver-thiocyanate hybrids have been prepared, featuring 2-D layers with tetragonal/hexagonal grids and interlocking/intercalating viologens. These materials exhibit structural adjustments upon external low pressure stimulus, room temperature CT interaction, reversible piezochromic luminescence, excellent photocurrent responses, and efficient photocatalytic degeneration performances on organic dyes. The work contributes to the development of new stimuli-response materials.
研究不足
The technical and application constraints of the experiments include the need for precise control of reaction conditions such as pH and temperature, and potential areas for optimization in the synthesis process to improve yield and purity of the hybrids.
1：Experimental Design and Method Selection:
Solution volatilization method was adopted for the synthesis of hybrids.
2：Sample Selection and Data Sources:
AgSCN reacted with excess KSCN in the presence of linear viologens templates.
3：List of Experimental Equipment and Materials:
AgSCN, KSCN, viologen nitrates (MV·(NO3)2, EV·(NO3)2, BV·(NO3)2, CMV·(NO3)2, BMPE·(NO3)2), DMF, H2O, CH3OH, CH3CN, AgClO4, HClO
4：Experimental Procedures and Operational Workflow:
The silver-thiocyanate solution was dropped into the viologen solution slowly, and the mixture was continued stirring for 30 minutes. The clear solution was kept stirring for 2h and filtered. The evaporation was conducted on room temperature for several days.
5：Data Analysis Methods:
IR spectra, elemental analyses, PXRD measurements, solid-state UV-Vis spectra, photoluminescence behaviours, photocurrent response curves, ESR signals.
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AgSCN
Starting material for the synthesis of silver-thiocyanate hybrids.
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KSCN
Excess reactant in the synthesis of silver-thiocyanate hybrids.
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MV·(NO3)2
Viologen template for directing the structure of hybrids.
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EV·(NO3)2
Viologen template for directing the structure of hybrids.
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BV·(NO3)2
Viologen template for directing the structure of hybrids.
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CMV·(NO3)2
Viologen template for directing the structure of hybrids.
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BMPE·(NO3)2
Viologen template for directing the structure of hybrids.
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AgClO4
Silver source in the synthesis of silver-thiocyanate hybrids.
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DMF
Solvent used in the synthesis process.
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H2O
Solvent used in the synthesis process.
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CH3OH
Solvent used in the synthesis process.
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CH3CN
Solvent used in the synthesis process.
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HClO4
Used for pH adjustment in the synthesis process.
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