An 11 nm Molecular Wire that Switches Electrochemically between an Insulating and a Fully Conjugated Conducting State
摘要:
Molecular wires consisting of oligothiophenes and oligothiophenylethynes, ranging in length from 2 to 11 nm, are synthesized and examined by spectroscopy and electrochemistry. UV spectroscopy shows that the longest wires are not fully conjugated, but twisted. However, cyclic voltammetry indicates that their monocations are now flattened and conjugated over the entire length range. In appropriate systems, the wires will link to two electrodes across a nanoscale gap and conduct current.
Clean and Efficient Iodination of Thiophene Derivatives
作者:Frédéric Gohier、Jérémie Grolleau、Pierre Frère
DOI:10.1055/s-0035-1560480
日期:——
Abstract Iodination of thiophene derivatives is realized using a simple, fast, and efficient methodology. Iodination of thiophene and 2- or 3-substituted or 3,4-disubstituted thiophenes with N-iodosuccinimide (NIS) activated with 4-toluenesulfonic acid in ethanol gives pure iodinated products that require no further purification. Iodination of thiophene derivatives is realized using a simple, fast
Synthesis and Characterization of Diferrocenyl Conjugates: Varying π‐Conjugated Bridging Ligands and its Consequence on Electrochemical Communication
作者:Sourav Saha Roy、Sanjib K. Patra
DOI:10.1002/ejic.201900114
日期:2019.4.30
Organometallic wire‐like complexes with ferrocenyl termini, conjugated with one and two units of thienylethynyl (M1 and M2) and thienyl (M3 and M4) groups, have been synthesized with a general formula of [Fc‐C≡C‐(Th‐C≡C)1‐2‐Fc] and [Fc‐(Th)1‐2‐Fc] (Fc = ferrocenyl, Th = thienyl) respectively. The diferrocenyl organometallic complexes have been characterized by various spectroscopic tools such as multinuclear
The invention relates to a process of preparing regioregular polymers, in particular head-to-tail (HT) poly-(3-substituted) thiophenes with high regioregularity, to novel polymers prepared by this process, and to the use of the novel polymers as semiconductors or charge transport materials in optical, electrooptical or electronic devices including field effect transistors (FETs), electroluminescent, photovoltaic and sensor devices, to FETs and other semiconducting components or materials comprising the novel polymers.
Hexabenzocoronene-based compound for organic photovoltaic cells
申请人:Centre National De La Recherche Scientifique
公开号:US10454034B2
公开(公告)日:2019-10-22
Provided is a hexabenzocoronene-based compound and a donor: acceptor layer having this compound. Also provided are processes for manufacturing this compound and to a photovoltaic cell having at least one hexabenzocoronene-based compound. The hexabenzocoronene-based compound has following formula I:
wherein R1, R3, R4 and R6 are independently from each other chosen among a carboxylic (—COOH) group, a cyano (—C≡N) group, an isocyano (—N+≡C−) group, a cyanate (—O—C≡N) group and a —F group, and R2 and R5 are, independently from each other, chosen among a poly(3-oxypentylthiophene) (P3OPT) substituent and a poly(3-hexylthiophene) (P3HT) substituent.