Synthesis of Aryl Trimethylstannane via BF<sub>3</sub>·OEt<sub>2</sub>-Mediated Cross-Coupling of Hexaalkyl Distannane Reagent with Aryl Triazene at Room Temperature
BF3·OEt2-mediated cross-coupling of (SnMe3)2 with aryl triazene offers a new strategy for the synthesis of aryl stannane. A variety of synthetically useful aryl trimethylstannanes were produced in moderate to good yields with this metal-free approach. One-pot sequential Stille cross-coupling with different aryl bromides provides a short entry to both symmetrical and unsymmetrical biaryl compounds.
Synthesis of aryl trimethylstannanes from aryl halides: an efficient photochemical method
作者:Kai Chen、Pei He、Shuai Zhang、Pengfei Li
DOI:10.1039/c6cc01135g
日期:——
transition-metal-free photochemical method featuring excellent functional group tolerance, mild reaction conditions and short reaction times has been discovered and developed for the synthesis of (hetero)aryl trimethylstannanes from (hetero)aryl halides.
calculations. TD-DFT calculations indicated that the charge-transfer strength can be correlated with the observed optical properties. In addition, the influence of the acceptor position on the photoluminescence spectra, fluorescence quantumyields and emission lifetimes was specified. We show that the ThD optical properties can be tuned in a wide spectral range by a change made in only a single step of
在本文中,我们报告了六种具有D–π–A结构的新型噻吩衍生物(ThD)的合成和光物理性质。这项工作的主题是三个硝基苯基(1)BT-Th-NO 2和三个苄腈(2)BT-Th-CN,它们在芳香环的不同位置取代((a)邻位-,(b)间位-或(c)第-)段。使用简单的三步合成法获得染料,并通过1 H和13确认其化学结构13 C NMR,IR和高分辨率质谱。位置异构现象对光学性能的影响已经在实验和理论上进行了探索。使用稳态和时间分辨光谱研究光物理性质,并且获得的结果得到量子化学计算的支持。TD-DFT计算表明,电荷转移强度可以与观察到的光学性质相关。另外,确定了受主位置对光致发光光谱,荧光量子产率和发射寿命的影响。我们表明,仅在合成反应的一个步骤中进行更改,即可在很宽的光谱范围内调节ThD光学性能。
properties in organic field-effect transistor (OFET) applications. In fact, under an ambient atmosphere, solution-processed bottom-gate top-contact (BGTC) transistors exhibit ambipolar charge transport properties by tuning the HOMOs of the DTCDI-based triads so that they were suitable for hole injection, resulting in balanced maximum electron and hole mobilities of 1.66 × 10−3 and 1.02 × 10−3 cm2 V−1
开发双极性有机半导体材料对于用于类似互补的逆变器和发光晶体管至关重要。在本研究中,设计并合成了三种新的二噻吩并二亚胺 (DTCDI) 衍生的三联体DTCDI-BT、DTCDI-BBT和DTCDI-BNT,其中端基大小各异,即噻吩 (T)、苯并[ b ]噻吩 (BT) 和石脑油 [2,3- b ] 噻吩 (NT) 分别在 DTCDI 的两个噻吩环的 α 位被取代。DFT 计算表明,与母体 DTCDI 核心(-5.99 eV)相比,三个三元组的 HOMO 能级显着增加到 -5.59、-5.59 和 -5.45 eV,分别为DTCDI-BT、DTCDI-BBT和DTCDI-BNT分别是,而 LUMO 能级(-3.07 eV ∼ -3.14 eV)几乎与 DTCDI 核(-3.10 eV)相同。结果预测,三元组在有机场效应晶体管 (OFET) 应用中可能具有双极传输特性。事实上,在环境气氛下,溶液处理的底栅顶接触
We report new NDTI-based triad-type ambipolar molecular semiconductors for high-performance air-stable, solution-processed OFETs and complementary-like inverters.