42506-57-0Relevant academic research and scientific papers
PHOTODIMERIZATION OF 2,6-DIPHENYLPYRYLIUM SALT IN THF SOLUTION
Kawata, Hiroki,Suzuki, Yoshizo,Niizuma, Shigeya
, p. 4489 - 4492 (1986)
By the photoillumination of 2,6-diphenylpyrylium tetrafluoroborate (DPP) in tetrahydrofuran (THF), its dimer is confirmed to be formed trough the pyranyl radical which is produced by one electron reduction of DPP.
Design of π -extended dipyranylidenes as redox-active materials
Courté, Marc,Fichou, Denis,Ng, Yong Xiang,Tang, Shasha
, (2021/07/02)
A series of novel tetrasubstituted dipyranylidenes (DIPO) consisting of large π-extended moieties located at the four edge of the quinoidal core were synthesized and characterized with UV–visible, photoluminescence spectroscopies and cyclic voltammetry. Tetraphenyldipyranylidene compound has a high molar absorption coefficient with ε = 8.73 × 104 l/mol.cm at 456 nm. Larger π-extended DIPO derivatives show a bathochromic absorption peak with lower molar absorption coefficient. In the presence of large π-extended moieties, these molecules present a higher first oxidation potential, leading to a deeper HOMO level. Remarkably, naphthyl, benzothienyl and benzofuryl-substituted DIPO show a third oxidation potential at 0.91 V, 0.99 V and 1.08 V respectively. These novel compounds which combined both aromatic and quinoidal characters are attractive for their applications as multiredox active materials.
Structural and electronic properties of 2,2′,6,6′-tetraphenyl-dipyranylidene and its use as a hole-collecting interfacial layer in organic solar cells
Courté,Alaaeddine,Barth,Tortech,Fichou
, p. 487 - 492 (2017/03/15)
The accumulation of positive charges at the anodic interface considerably limits the efficiency of photovoltaic solar cells based on polymer/fullerene bulk heterojunctions (BHJs). Interfacial layers (IFLs) such as PEDOT:PSS improve charge injection but ha
Method for manufacturing organic electronic devices
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Paragraph 7; 8, (2017/11/09)
The present invention relates to a method for manufacturing organic electronic devices including a dipyrannylidene film as an anodic interface layer, the method being carried out in a vacuum and without any exposure to air. The invention also relates to o
ELECTROSYNTHESIS OF 2,2',6,6'-TETRAARYL 4,4'-BIPYRANNYLIDENES WITH EIGHT FLEXIBLE CHAINS.
Amatore, Christian,Jutand, Anny,Pflueger, Fernando,Jallabert, Colette,Strzelecka, Helena,Veber, Michele
, p. 1383 - 1386 (2007/10/02)
2,2',6,6'-tetraaryl 4,4'-bipyrannylidene with eight flexible chains are synthesized by electrochemical reduction of the corresponding 2,6-diarylpyrylium salts.
SYNTHESE ELECTROCHIMIQUE DE BIPYRANNYLIDENES UNE NOUVELLE VOIE D'ACCES A DES SYSTEMES FORTEMENT DONNEURS
Mabon, Gilles,Simonet, Jacques
, p. 193 - 196 (2007/10/02)
The electrochemical method is used in the easy synthesis of donating systems by means of the cathodic reduction of thiopyrones in the presence of alkyl halides.
Some Reactions of 4H-Pyrylium Salts with Tributylphosphine and with Tertiary Amines
Reynolds, G. A.,Chen, C. H.
, p. 1235 - 1237 (2007/10/02)
The phosphonium salt from tributylphosphine and 2,6-di(4-methoxyphenyl)pyrylium perchlorate (3) reacted with diisopropylethylamine in acetonitrile to give 2,2',6,6'-tetra(4-methoxyphenyl)-Δ4,4'-bi-4H-pyran in quantitative yield.The reaction of 3 and other 4H-pyrylium salts with tertiary amines gave 4H-pyrans.
Thione photochemistry: on the formation of dipyranylidenes from pyranthiones
Berenjian, Nader,Mayo, Paul de
, p. 2612 - 2616 (2007/10/02)
The irradiation of the pyranthione 1 has been reinvestigated.The reaction proceeds through the (n,?*) triplet and can be quenched with ferrocene.The reaction can be sensitized with Michler's ketone or triphenylene.The elimination of sulfur from
