Detail of "3779-27-9"

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Synthesis and photovoltaic properties of mono-substituted quaterthiophenes bearing strong electron-withdrawing group

All Rights Reserved. Synthesis and photovoltaic properties of mono-substituted quaterthiophenes bearing strong electron-withdrawing group.In this study， 3779-27-9 and 133144-35-1 are also used. Yassar, Abderrahim; Videlot, Christine; Jaafari, Abdelhafid. (ITODYS, Paris F-75005, Fr.). Solar Energy Materials & Solar Cells, 90(7+8), 916-922 (English) 2006 Elsevier B.V. CODEN: SEMCEQ. ISSN: 0927-0248. DOCUMENT TYPE: Journal CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Section cross-reference(s): 76 We report here on the synthesis and properties of a monosubstituted quaterthiophene deriv. asym. functionalized by an electron-withdrawing group using the palladium-catalyzed Stille's coupling reaction. The UV-vis absorption spectrum evidences a strong intramol. charge transfer transition. Thus oligothiophenes act as electron donors and substituent group as acceptor. The diodes in which monosubstituted quaterthiophenes behave as org. semiconductors, exhibit a rectifying behavior. Photovoltaic measurements show moderate power conversion efficiency. .

Photochemical synthesis of phenyl-2-thienyl derivatives

Photochemical synthesis of phenyl-2-thienyl derivatives. 107938-08-9 and 3779-27-9 are also in the experiment. Antonioletti, Roberto; D'Auria, Maurizio; D'Onofrio, Franco; Piancatelli, Giovanni; Scettri, Arrigo (Dip. Chim., Univ. 'La Sapienza', Rome 00185, Italy). J. Chem. Soc., Perkin Trans. 1, (10), 1755-8 (English) 1986. CODEN: JCPRB4. ISSN: 0300-922X. DOCUMENT TYPE: Journal CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Irradn. of thiophenes I (R = R1 = H; R2 = Br, iodo; R = Me, R1 = H, R2 = iodo) in benzene gave I (R2 = Ph) in 54-94% yields. Irradn. I(R = H, R1 = R2 = Br) in benzene gave 43% I (R = H, R1 = Br, R2 = Ph) whereas I(R = H, R1 = R2 = iodo) gave 91% I (R = H, R1 = R2 = Ph). In contrast thiophene II (R3 = R4 = iodo) gave 73% II(R3 = iodo, R4 = Ph). Generally, iodothiophenes were more reactive and more stable than bromothiophenes under the reaction conditions. .