282540-12-9Relevant articles and documents
Molecular Design of Semiconducting Polymers for High-Performance Organic Electrochemical Transistors
Nielsen, Christian B.,Giovannitti, Alexander,Sbircea, Dan-Tiberiu,Bandiello, Enrico,Niazi, Muhammad R.,Hanifi, David A.,Sessolo, Michele,Amassian, Aram,Malliaras, George G.,Rivnay, Jonathan,McCulloch, Iain
, p. 10252 - 10259 (2016)
The organic electrochemical transistor (OECT), capable of transducing small ionic fluxes into electronic signals in an aqueous environment, is an ideal device to utilize in bioelectronic applications. Currently, most OECTs are fabricated with commercially available conducting poly(3,4-ethylenedioxythiophene) (PEDOT)-based suspensions and are therefore operated in depletion mode. Here, we present a series of semiconducting polymers designed to elucidate important structure-property guidelines required for accumulation mode OECT operation. We discuss key aspects relating to OECT performance such as ion and hole transport, electrochromic properties, operational voltage, and stability. The demonstration of our molecular design strategy is the fabrication of accumulation mode OECTs that clearly outperform state-of-the-art PEDOT-based devices, and show stability under aqueous operation without the need for formulation additives and cross-linkers.
Synthesis and characterization of all-conjugated diblock copolymers consisting of thiophenes with a hydrophobic alkyl and a hydrophilic alkoxy side chain
Kim, Jinseck,Siva, Ayyanar,Song, In Young,Park, Taiho
, p. 3704 - 3709 (2011)
Novel thiophene-based all-conjugated block copolymers consisting of 3-hexylthiophene and 3-{2-[2-(2-methoxyethoxy)ethoxy]ethoxy}thiophene were synthesized using the Grignard metathesis (GRIM) polymerization method in the presence of Ni(dppp)Cl2. Favorable transfer of the catalytic site from an electron-poor precursor to an electron-rich monomer was found to produce the block copolymer. The molecular weights of the copolymers increased slightly with increasing polymerization temperature (10.1 × 103 M n (35 °C) → 11.1 × 103 Mn (55 °C)), suggesting that transit of the catalytic site was accelerated at high temperatures. Size exclusion chromatography, UV-vis and photoluminescence spectroscopies, and cyclic voltammetry measurements confirmed that the polymers were block copolymers. The blocks were associated and organized relative to one another in adjacent chains.
MOLECULAR FLUOROPHORES AND PREPARATION METHOD THEREOF AND USE FOR SHORT WAVELENGTH INFRARED IMAGING
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Page/Page column 33-34, (2017/12/13)
Provided is the design, synthesis and applications of molecular fluorophores for bioimaging in the short wavelength infrared window (1000-1700 nm). The molecular fluorophores compound comprise structures with electron accepting aromatic units, electron donating aromatic units, and an shielding units which shield the conjugated backbones from intermolecular interactions.
