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This review article summarizes the synthetic efforts in constructing functional hyperbranched macromoleculesfrom acetylenic triple-bond building blocks. Polymerization reactions including polycoupling, polyadditionand polycyclotrimerization have been developed for the synthesis of new hyperbranched polymers such as polyynes,polyenes, polyarylenes and polytriazoles with novel topological structures...
Aggregation‐induced emission (AIE) stands for an intriguing phenomenon that a series of non‐planar molecules that are nonluminescent or weakly emissive in solutions are induced to emit strongly in the aggregated or solid states. Recently, AIE becomes a very hot research topic as evidenced by the exponential growth of AIE‐related publications and citations. Herein, the recent advances of a class of...
Aggregation-induced emission (AIE) organic molecule 4,7-Bis[4-(1,2,2-triphenylvinyl)phenyl]benzo-2,1,3-thiadiazole (BTPETD) was used as a top emitter on GaN-based light-emitting diode (LED) to produce white light. The fabricated hybrid organic/inorganic LED shows CIE coordinates of (0.32, 0.33) and 45.4% optical extraction efficiency from BTPETD layer with pump leakage of 17.3%. At driving current...
Tetraphenylethene-containing polyynes with aggregation-induced emission characteristics are synthesized. The polymers are highly transparent in the entire visible spectral region and show high refractive indices (n = 1.7787−1.6543) in a wide wavelength region of 400–1700 nm.
It has been a textbook knowledge that chromophore aggregation generally quenches light emission. Here, we present an opposite phenomenon termed aggregation-induced emission (AIE) and identified the restriction of intramolecular rotation as a main cause for the AIE effect. Based on the mechanistic understanding, we explored the technological applications of the AIE luminogens as light-emitting and...
Nanocomposites reinforced with hybrid fillers of carbon nanotube (CNT) and carbon black (CB) were developed, aiming at enhancing the electrical conductivity of the composites with balanced mechanical properties while lowing the cost of the final product. Epoxy-based nanocomposites were successfully prepared with varying combinations of CNT and CB as conductive fillers and their electrical and mechanical...
Fluorescence correlation spectroscopy (FCS) was used to study the nano-clusters of silole molecules formed by aggregation from solutions in acetone-water mixtures. It allowed the determination of the size of clusters in nanometer scale. Aggregate formation was investigated systematically by measuring the cluster sizes made at different silole concentrations and water contents.
A simple approach for coating carbon nanotubes (CNTs) with silver nanoparticles was developed in this work, aiming to enhance the electrical conductivity of CNTs. To coat Ag nanoparticles on CNTs (Ag@CNTs) effectively, CNTs were treated using ball milling with addition of ammonium bicarbonate, followed by reduction of silver ions in N,N- dimethylformamide (DMF). Transmission electron microscope (TEM),...
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