A new class of organic semiconductors for solution processed OTFTs: Synthesis and characterization of pyrrolo–perylene derivatives with different end groups
摘要:
New pyrrolo perylene derivatives, a new class of organic semiconductor, were designed for solution processed organic thin film transistors (OTFTs). Newly designed 2-(naphthalen-2-yl)thiophene end capped pyrrolo perylene, 3,10-bis(5-(naphthalen-2-yl)thiophen-2-yl)-1-(2-octyldodecyl)-1H-phenanthro[1,10,9,8-cdefg]carbazole (NTPP), and bithiophene end capped pyrrolo-perylene, 3,10-bis([2,2'-bithiophen]-5-yl)-1-(2-octyldodecyl)-1H-phenanthro[1,10,9,8-cdefg]carbazole (BTPP), were synthesized by Suzuki coupling and Stille coupling reaction, respectively. NTPP and BTPP showed good solubility in common organic solvents and were characterized by various spectroscopy. Solution processed OTFTs using BTPP exhibited high field-effect mobilities up to 0.11 cm(2) V-1 s(-1) an on/off ratio of 1 x 10(4) and a very small threshold voltage of 0 V. while OTFTs using NTPP exhibited far lower performances. The high mobility of BTPP is attributed to three dimensional multi-layered crystalline structure based on the results of the two dimensional grazing incidence X-ray diffraction pattern analysis and theoretical calculation using Gaussian, together with morphological study. (C) 2013 Elsevier Ltd. All rights reserved.
Mono- and dinuclear cyclopalladates as catalysts for Suzuki–Miyaura cross-coupling reactions in predominantly aqueous media
作者:G. Narendra Babu、Samudranil Pal
DOI:10.1016/j.tetlet.2017.01.089
日期:2017.3
Suzuki–Miyaura cross-coupling reactions of aryl halides with arylboronic acids were performed in predominantly aqueous media employing two mono- and two dinuclear cyclopalladated complexes as catalysts. These complexes are [Pd(HL)Cl] (I), [Pd(L)(PPh3)] (II), [Pd2(μ-dppb)(L)2] (III) and [Pd2(μ-dppf)(L)2] (IV); where H2L, dppb and dppf represent 4-methoxy-N′-(mesitylidene)benzohydrazide, 1,4-bis(dip
Transition-Metal-Free Cross-Coupling of Aryl and Heteroaryl Thiols with Arylzinc Reagents
作者:Bo Yang、Zhong-Xia Wang
DOI:10.1021/acs.orglett.7b03145
日期:2017.11.17
Cross-coupling of (hetero)arylthiols with arylzinc reagents via C–S cleavage was performed under transition-metal-free conditions. The reaction displays a wide scope of substrates and high functional-group tolerance. Electron-rich and -deficient (hetero)arylthiols and arylzinc reagents can be employed in this transformation. Mg2+ and Li+ ions were demonstrated to facilitate the reaction.
Palladium-Catalyzed Solid-State Polyfluoroarylation of Aryl Halides Using Mechanochemistry
作者:Rikuro Takahashi、Tamae Seo、Koji Kubota、Hajime Ito
DOI:10.1021/acscatal.1c03731
日期:2021.12.17
products. Here, we show that solid-state high-temperature ball-milling conditions facilitate a palladium-catalyzed cross-coupling with polyfluorinated arylboronic acids and pinacol esters employing a simple catalytic system in the absence of any stoichiometric additives. This reaction exhibits a broad substrate scope and can be carried out in air, and the use of large amounts of dry and degassed organic solvents
Biarylalkyl Carboxylic Acid Derivatives as Novel Antischistosomal Agents
作者:Patrick Mäder、Ariane S. Blohm、Thomas Quack、Kerstin Lange-Grünweller、Arnold Grünweller、Roland K. Hartmann、Christoph G. Grevelding、Martin Schlitzer
DOI:10.1002/cmdc.201600127
日期:2016.7.5
biarylalkyl carboxylicacid derivatives for their antischistosomal activity against S. mansoni. These compounds showed significant influence on egg production, pairing stability, and vitality. Tegumental lesions or gut dilatation was also observed. Substitution of the terminal phenyl residue in the biaryl scaffold with a 3-hydroxy moiety and derivatization of the terminal carboxylicacid scaffold with
observed that through the use of only 0.2 mol% Pd(OAc)2 as the catalyst, a range of aryl bromides undergoes coupling via a C-H bond activation/functionalization reaction with thiophene to give 2-arylated thiophenes in good yields. In most cases, only traces of polyarylated thiophenes were detected when a large excess of thiophene was employed. This air-stable catalyst can be used with a wide variety of