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Published on: May 20, 2019
A fully substituted 3-silolene functions as promising building block for hyperbranched poly(silylenevinylene)
Zujin Zhao1, Yanju Guo, Tao Jiang
1College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China.
Researchers synthesized a novel silole derivative, TDMSHS, and polymerized it into a hyperbranched poly(silylenevinylene) (hb-SPSV). This material shows high thermal stability, strong fluorescence, and efficient quenching by picric acid.
Area of Science:
- Organometallic Chemistry
- Polymer Science
- Materials Science
Background:
- Silolene derivatives are versatile building blocks in polymer synthesis.
- Hyperbranched polymers offer unique properties due to their complex architectures.
- Fluorescent polymers have applications in sensing and optoelectronics.
Purpose of the Study:
- To synthesize and characterize a novel 3-silolene derivative, TDMSHS.
- To develop a stereoregular silole-containing hyperbranched poly(silylenevinylene) (hb-SPSV) via hydrosilylation polymerization.
- To investigate the thermal stability, fluorescence properties, and sensing capabilities of the synthesized hb-SPSV.
Main Methods:
- Synthesis and characterization of TDMSHS using X-ray diffraction crystallography and spectroscopic methods.
- Hydrosilylation polymerization of TDMSHS with a diphenylsilole derivative using Karstedt's catalyst.
- Analysis of polymer molecular weight, thermal stability (TGA), fluorescence emission, and quenching efficiency.
Main Results:
- Successful synthesis and characterization of TDMSHS.
- Generation of high molecular weight (M(w) = 146,000) hb-SPSV in high yield (≈95%) with controlled stereoregularity.
- hb-SPSV demonstrated excellent thermal stability and strong fluorescence.
- Efficient fluorescence quenching of hb-SPSV aggregates by picric acid with high quenching constants (K(SV) up to 414400 M(-1)).
Conclusions:
- The novel silolene derivative TDMSHS is a viable monomer for creating advanced polymer architectures.
- The resulting hb-SPSV possesses desirable properties for potential applications in fluorescent sensors.
- The efficient picric acid quenching highlights the potential of hb-SPSV in detecting nitroaromatic explosives.
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