20608-87-1

Upstream product

• 6165-69-1 Thien-3-ylboronic acid 
• 609-67-6 2-Iodobenzoyl chloride 
• 610-94-6 2-bromobenzoic acid methyl ester 

Downstream Products

• 1394850-40-8 2-(2-(4-(diphenylamino)phenyl)-8H-indeno[2,1-b]thiophen-8-ylidene)malononitrile 

Relevant academic research and scientific papers

ipso-Arylative Ring-Opening Polymerization as a Route to Electron-Deficient Conjugated Polymers

ipso-Arylative ring-opening polymerization of 2-bromo-8-aryl-8H-indeno[2,1-b]thiophen-8-ol monomers proceeds to Mn up to 9 kg mol?1 with conversion of the monomer diarylcarbinol groups to pendent conjugated aroylphenyl side chains (2

Synthesis, characterization, and field-effect transistors properties of novel copolymers incorporating nonplanar biindeno[2,1-b]thiophenylidene building blocks

A nonplanar but conjugated heteroacene, biindeno[2,1-b]thiophenylidene (BTP), is employed to design and synthesize solution-processable polymer semiconductors for organic field-effect transistors (OFETs) applications first. By copolymerizing with isoindigo (IDG), diketopyrrolopyrrole (DPP), and naphthalenediimide (NDI) derivatives, three novel BTP-based copolymers (PBTP-IDG, PBTP-DPP, and PBTP-NDI) have been synthesized and characterized successfully. The results indicate that three BTP-based polymers exhibit broad absorption spectra and good solubility in most common solvents. Because of the dominantly electron-deficient contributions to the whole polymer backbones, the energy levels of the lowest unoccupied molecular orbitals are decreased to ca. -4.0 eV for all these polymers, thus exhibiting good electron affinities. Moreover, the deep-lying energy levels of the highest occupied molecular orbitals (HOMO) have been demonstrated for three BTP-based polymers, with the HOMO values ranging from -5.48 to -5.80 eV. Investigation of the OFETs performance indicates that three BTP-based polymers exhibit well hole transport properties in ambient air and excellent ambipolar performance in a N2 glovebox. Compared with PBTP-IDG and PBTP-NDI, the uniform morphological structure, interconnected polycrystalline grain, and close π-π stacking distance endow PBTP-DPP with higher hole mobility of 1.43 cm2 V-1 s-1. Particularly, the well-balanced hole and electron mobilities of 0.68 and 0.13 cm2 V-1 s-1 have been demonstrated for the PBTP-DPP-based OFETs in a N2 atmosphere, respectively. The results suggest that the nonplanar BTP unit and its derivatives are promising π-conjugated building blocks for the design and synthesis of solution-processable polymer semiconductors with high charge-transporting performance.

Electron acceptor material with photo-thermal stability and organic solar cell constructed by electron acceptor material

The invention discloses an electron acceptor material with photo-thermal stability and an organic solar cell constructed by the electron acceptor material. The electron acceptor material takes an electron donating unit D as a core, and two ends of the electron acceptor material are coupled with an electron withdrawing unit A through a single bond to form an A-D-A structure. The organic solar cellcomprises a substrate, a cathode, an electron transport layer, an active layer, an anode modification layer and an anode, wherein the active layer is a blended film of a polymer donor and an A-D-A structure electron acceptor material. The spectral response range of the prepared organic solar cell is 350-900 nm, the open-circuit voltage (Voc) is 0.73-0.89 V, the short-circuit current (Jsc) is 7.20-15.63 mA cm, and the energy conversion efficiency (PCE) is 2.75-7.93%.

Visible-Light-Induced Arene C(sp 2)-H Lactonization Promoted by DDQ and tert -Butyl Nitrite

A visible-light photocatalytic aerobic oxidative lactonization of arene C(sp 2)-H bonds proceeds in the presence of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and tert -butyl nitrite (TBN). Under the optimized conditions, a range of 2-arylbenzoic acids is converted into the corresponding benzocoumarin derivatives in moderate to excellent yields. This method is characterized by its atom economy, mild reaction conditions, the use of a green oxidant and metal-free catalysis.

Twisted but conjugated: Building blocks for low bandgap polymers

Here we report a novel twisted monomer based on a distorted C=C double bond for low bandgap conjugated copolymers. This new building block provides several unique characteristics when compared to classical planar systems such as high solubility, electron accepting ability, and isomeric tunability. The resulting copolymers exhibit broad absorption spanning both visible and near-infrared regions leading to promising solar cell performance. A simplified synthetic approach provided novel building blocks for conjugated polymers featuring a non-planar repeat unit and a distorted double bond. The resulting copolymers are characterized by a broad absorption profile and show promising results in solar cells.

Structural modulation of internal charge transfer in small molecular donors for organic solar cells

Donor-acceptor molecules with small chain extension have been synthesized and used as active material in organic solar cells. The effect of fusion of a phenyl group on the end dicyanovinylene acceptor is discussed.

A colored dendrimer as a new soluble support in organic synthesis. Part 1: Suzuki reaction

A new strategy using a colored dendrimer as visible soluble support for organic synthesis has been developed. The efficiency of this new system has been demonstrated by the use of DRHMPA9-CH2OH as the support in a Suzuki coupling reaction. Due to the visibility of the support, following of the reaction has been rendered easier and the purification time of the crude product has been considerably shortened.