A Macrocyclization of 1,8-Bis(dithiafulvenyl)pyrenes
作者:Mohammadreza Khadem、Joshua C. Walsh、Graham J. Bodwell、Yuming Zhao
DOI:10.1021/acs.orglett.6b00894
日期:2016.5.20
Dithiafulvenyl (DTF) end groups were linked to the 1 and 8 positions of a pyrene core directly or via phenylene bridges to afford redox-active pyrene derivatives. Upon oxidation, the 1,8-bis(DTF)pyrene underwent stepwise electron transfers to form radical cation and dication species, whereas the phenylene-extended bis(DTF)pyrene derivative was cyclized into a macrocyclic trimer through sequential DTF
Synthesis of optically active amphiphilic tetrathiafulvalene derivatives
作者:Elba Gomar-Nadal、Concepció Rovira、David B. Amabilino
DOI:10.1016/j.tet.2006.01.056
日期:2006.4
these compounds, whose optimized synthesis involved the nucleophilic substitution of a chiral bromo methylene derivative with tetrabutylammonium bis(2-thioxo-1,3-dithiole-4,5-dithiolate)zincate. The tetrathiafulvalenes were prepared by coupling the 1,3-dithiol derivative with 4,5-bis(methoxycarbonyl)-1,3-dithiol-2-one or 4,5-bis(2-cyanotehylthio)-1,3-dithiol-2-thione. The products were fully characterized
Selective dispersion of single-walled carbon nanotubes with electron-rich fluorene-based copolymers
作者:Shuai Liang、Ayyagari V. Subrahmanyam、Mohammadreza Khadem、Yuming Zhao、Alex Adronov
DOI:10.1039/c6ra02524b
日期:——
fluorene-based π-conjugated copolymers containing electron-donating dithiafulvene (DTF) and π-extendedtetrathiafulvalene (exTTF) repeat units through Suzuki coupling polymerization. The resulting copolymers showed a comparable degree of polymerization and retained the redox activity originating from the DTF and exTTFbuildingblocks. Theoretical modeling studies predicted that these electron-rich copolymers could
Structural Tuning of Curved TTFAQ-AQ as a Redox-Active Supramolecular Partner for C<sub>70</sub> Fullerene
作者:Maryam F. Abdollahi、Yuming Zhao
DOI:10.1021/acs.joc.1c01633
日期:2021.11.5
the donor and an anthraquinone (AQ) unit as the acceptor. As such, TTFAQ-AQs show enhanced intramolecular charge-transfer properties, which result in amphoteric redox behavior and narrow electronic energy band gaps. Detailed structural and electronic properties were investigated by UV–vis absorption, cyclic voltammetric, and single-crystal X-ray diffraction (SCXRD) analyses. The supramolecular interactions
设计并合成了一系列马鞍形供体-受体 π 系统,称为 TTFAQ-AQ。TTFAQ-AQ 的分子结构具有 π 稠合框架,其中包含一个蒽醌二甲烷延伸的四硫富瓦烯 (TTFAQ) 作为供体和一个蒽醌 (AQ) 单元作为受体。因此,TTFAQ-AQ 显示出增强的分子内电荷转移特性,从而导致两性氧化还原行为和狭窄的电子能带隙。通过紫外可见吸收、循环伏安法和单晶 X 射线衍射 (SCXRD) 分析研究了详细的结构和电子特性。TTFAQ-AQ 与 C 60和 C 70的超分子相互作用在溶液和固相中都检测了富勒烯。我们的结果表明,苯并环化的 TTFAQ-AQ 衍生物有利于通过互补的凹凸相互作用与 C 70富勒烯相互作用。通过密度泛函理论 (DFT) 计算评估了 TTFAQ-AQ/C 70相互作用中涉及的详细能量学。
When dithiafulvenyl functionalized π-conjugated oligomers meet fullerenes and single-walled carbon nanotubes
作者:Karimulla Mulla、Yuming Zhao
DOI:10.1039/c3tc30626g
日期:——
aldehyde-endcapped oligomer products. This reaction provides an appealing approach for efficient fluorescence turn-on sensing of fullerenes. Furthermore, the DTF-attached oligomers showed strong noncovalent interactions with single-walledcarbonnanotubes (SWNTs) to form soluble supramolecular assemblies in certain chlorinated organic solvents such as methylene chloride and chloroform. The dispersion of SWNTs effected