Conducting Silicone-Based Polymers and Their Application

Abstract

Over the past two decades, both fundamental and applied research in conducting polymers have grown rapidly. Conducting polymers (CPs) are unique due to their ease of synthesis, environmental stability, and simple doping/dedoping chemistry. Electrically conductive silicone polymers are the current state-of-the-art for, e.g., optoelectronic materials. The combination of inorganic elements and organic polymers leads to a highly electrically conductive composite with improved thermal stability. Silicone-based materials have a set of extremely interesting properties, i.e., very low surface energy, excellent gas and moisture permeability, good heat stability, low-temperature flexibility, and biocompatibility. The most effective parameters constructing the physical properties of CPs are conjugation length, degree of crystallinity, and intra- and inter-chain interactions. Conducting polymers, owing to their ease of synthesis, remarkable environmental stability, and high conductivity in the doped form, have remained thoroughly studied due to their varied applications in fields like biological activity, drug release systems, rechargeable batteries, and sensors. For this reason, this review provides an overview of organosilicon polymers that have been reported over the past two decades.

Synthesis of Pyridine-Fused Siloles by Palladium-Catalyzed Intramolecular Bis-Silylation

“…Recently, we reported the synthesis of pyridine-fused siloles using ruthenium-catalyzed hydrosilylation and their optical properties . Silole derivatives are attracting attention as new functional materials with excellent electronic and photophysical properties for various applications, such as organic light-emitting diodes (OLEDs), photovoltaic devices, and semiconductors. − Herein, we report the synthesis of pyridine-fused siloles under the conditions of the Sonogashira coupling reaction . These reactions are expected to proceed through the trans -bis-silylation of 3-(1,1,2,2,2-pentamethyldisilanyl)-2-(arylethynyl)­pyridine.…”

Significant energy gap modulation of sulfone-substituted benzosiloles: enhanced brightness and electron affinity for chemical vapor sensing, fingerprint detection and live-cell imaging

“…Hitherto, as the last key issue of this research field, the development of blue and deep blue fluorophores with high fluorescence quantum yield and stability has achieved substantial advancements by using heteroatom-bridged p-conjugated systems. 7,8 In particular, intensive research on silicon-bridged biaryls, such as benzosiloles, [9][10][11][12] has demonstrated to be effective because they usually feature high electron transport, improved thermal stability, and outstanding photoluminescence properties. 13 Deep insights into benzosiloles revealed that the incorporation of silicon atoms into p-conjugated systems could considerably lower the lowest unoccupied molecular orbital (LUMO) energy levels via the distinctive s*-p* conjugation.…”

Synthesis of dimethyl‐ and diphenylsilane‐based oligo(azine)s: Thermal, optical, electronic, and morphological properties

“…Silicon-containing polymers bearing dimethyldiphenylsilane (DMS) or tetraphenylsilane (TPS) cores have been an interesting research topic during the last years. [18][19][20] The TPS unit has also been widely used in optoelectronic materials such as host materials for OLEDs 19,[21][22][23][24] and, to a lesser extent, in thermally cctivated delayed fluorescence (TADF)-OLEDs devices due to their high triplet energy and simplicity of designtuning that allows obtaining different types of materials in terms of their charge transport abilities. 25,26 Silanebased materials bearing TPS-core have shown a crucial role in the processability of polymers, allowing them to solubilize in common organic solvents due to their "twisted" geometry, regarding DMS-core that tends to produce less soluble materials.…”

“…Silicon‐containing polymers bearing dimethyldiphenylsilane (DMS) or tetraphenylsilane (TPS) cores have been an interesting research topic during the last years 18–20 . The TPS unit has also been widely used in optoelectronic materials such as host materials for OLEDs 19,21–24 and, to a lesser extent, in thermally cctivated delayed fluorescence (TADF)‐OLEDs devices due to their high triplet energy and simplicity of design‐tuning that allows obtaining different types of materials in terms of their charge transport abilities 25,26 .…”