4282-29-5Relevant articles and documents
Low-cost synthesis and physical characterization of thieno[3,4-c]pyrrole-4, 6-dione-based polymers
Berrouard, Philippe,Dufresne, Stephane,Pron, Agnieszka,Veilleux, Justine,Leclerc, Mario
, p. 8167 - 8173,7 (2012)
The improved synthesis of thieno[3,4-c]pyrrole-4,6-dione (TPD) monomers, including Gewald thiophene ring formation, a Sandmeyer-type reaction, and neat condensation with an amine, is presented. This protocol enables faster, cheaper, and more efficient preparation of TPD units in comparison to traditional methods. Furthermore, a series of TPD homo- and pseudohomopolymers bearing various alkyl chains was synthesized via a direct heteroarylation polymerization (DHAP) procedure. UV-visible absorption and powder X-ray diffraction measurements revealed the relationship between the ratio of branched to linear alkyl chains and the optoelectronic properties of the polymers as well as their packing in the solid state.
Preparation process 2-5 - thiophene dicarboxylic acid
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Paragraph 0030-0031; 0036-0038; 0043-0045; 0050-0051, (2021/12/07)
The invention relates to 2-5 - thiophene dicarboxylic acid preparation process comprising the following steps: preparing intermediate product 2 - aminothiophene -3, 4 -dicarboxylic acid 3 - ethyl ester 4 - methyl ester; and obtaining the final product 2 - and -3 thiophene dicarboxylic acid through the obtained intermediate product thiophene 4 - and 3 - 3 - dicarboxylic acid 4 - ethyl ester 4 -3 methyl ester, and finally obtaining the intermediate product thienothiophene 5 - 2 4 - 4 -3 diethyl 4 - carboxylate and 3 - methyl ethyl ester. The method disclosed by the invention is low in price, mild in reaction and high in yield, does not need to be purified by a silica gel column, and is very suitable for amplification production.
From Red to Green Luminescence via Surface Functionalization. Effect of 2-(5-Mercaptothien-2-yl)-8-(thien-2-yl)-5-hexylthieno[3,4- c]pyrrole-4,6-dione Ligands on the Photoluminescence of Alloyed Ag-In-Zn-S Nanocrystals
Kowalik, Patrycja,Bujak, Piotr,Wróbel, Zbigniew,Penkala, Mateusz,Kotwica, Kamil,Maroń, Anna,Pron, Adam
supporting information, p. 14594 - 14604 (2020/10/09)
A semiconducting molecule containing a thiol anchor group, namely 2-(5-mercaptothien-2-yl)-8-(thien-2-yl)-5-hexylthieno[3,4-c]pyrrole-4,6-dione (abbreviated as D-A-D-SH), was designed, synthesized, and used as a ligand in nonstoichiometric quaternary nanocrystals of composition Ag1.0In3.1Zn1.0S4.0(S6.1) to give an inorganic/organic hybrid. Detailed NMR studies indicate that D-A-D-SH ligands are present in two coordination spheres in the organic part of the hybrid: (i) inner in which the ligand molecules form direct bonds with the nanocrystal surface and (ii) outer in which the ligand molecules do not form direct bonds with the inorganic core. Exchange of the initial ligands (stearic acid and 1-aminooctadecane) for D-A-D-SH induces a distinct change of the photoluminescence. Efficient red luminescence of nanocrystals capped with initial ligands (λmax = 720 nm, quantum yield = 67%) is totally quenched and green luminescence characteristic of the ligand appears (λmax = 508 nm, quantum yield = 10%). This change of the photoluminescence mechanism can be clarified by a combination of electrochemical and spectroscopic investigations. It can be demonstrated by cyclic voltammetry that new states appear in the hybrid as a consequence of D-A-D-SH binding to the nanocrystals surface. These states are located below the nanocrystal LUMO and above its HOMO, respectively. They are concurrent to deeper donor and acceptor states governing the red luminescence. As a result, energy transfer from the nanocrystal HOMO and LUMO levels to the ligand states takes place, leading to effective quenching of the red luminescence and appearance of the green one.
