Donor-Donor′-Acceptor Triads Based on [3.3]Paracyclophane with a 1,4-Dithiafulvene Donor and a Cyanomethylene Acceptor: Synthesis, Structure, and Electrochemical and Photophysical Properties
Donor–donor′–acceptor triads (1, 2), based on [3.3]paracyclophane ([3.3]PCP) as a bridge, with electron‐donating properties (D′) using 1,4‐dithiafulvene (DTF; TTF half unit) as a donor and dicyanomethylene (DCM; TCNE half unit) or an ethoxycarbonyl‐cyanomethylene (ECM) as an acceptor were designed and synthesized. The pulse radiolysis study of 1 a in 1,2‐dichloroethane allowed the clear assignment
供体- donor' -受体三单元组(1,2)的基础上,[3.3]对环芳([3.3] PCP)使用1,4- dithiafulvene作为桥梁,具有给电子性质(d')(DTF; TTF半单元)设计并合成了二氰基亚甲基(DCM; TCNE半单元)或乙氧基羰基-氰基亚甲基(ECM)作为受体。1,2-二氯乙烷中1 a的脉冲辐射分解研究清楚地确定了DTF自由基阳离子(1 a 。+)的吸收带,而γ-不能观察到DCM自由基阴离子引起的吸收带。在2-甲基四氢呋喃硬质玻璃中以77 K进行射线辐射分解。1 a的电化学氧化首先生成DTF自由基阳离子(1 a。+),其吸收带与通过脉冲放射分解研究观察到的吸收带一致,然后加上指示剂(1 a 2+)。1 a 。+的ESR光谱显示出具有精细结构的对称信号,ESR模拟预测1 a 。+的自旋在DTF部分的S和C原子以及带有亚甲基的三亚甲基桥的中心C原子上离域化。 DTF部
Bis(1,3-dithiol-2-ylidene)-[3.3]paracyclophanes: orthogonal intramolecular charge transfer interaction
A novel donor-cyclophane, orthogonally incorporated 1,3-dithiol-2-ylidene units (DT) to the cyclophanebenzenerings, was synthesized in order to observe the intramolecular charge transfer (ICT) between the donor units and the cyclophanebenzenerings.
Photoisomerization of norbornadiene (N) to its metastable isomer quadricyclane (Q) has attracted interest as a strategy for harvesting and storing solar energy. For this strategy to mature the absorption maximum of N has to be moved from the UV to the visible region. Here we show that functionalization of the system with dithiafulvene (DTF) electron donors causes remarkable redshifts of various N derivatives
Tuning Redox Properties and Self‐Assembly of Thienoacene‐Extended Tetrathiafulvalenes
作者:Cecilie Lindholm Andersen、Michal Zalibera、Karol Lušpai、Mikkel A. Christensen、Denisa Darvasiová、Vladimír Lukeš、Peter Rapta、Michael M. Haley、Ole Hammerich、Mogens Brøndsted Nielsen
DOI:10.1002/cplu.201800626
日期:2019.9
change in their redox states is a convenient way of controlling self-assembly and hence for advancing supramolecular chemistry. Here we present systematic studies on a selection of extended tetrathiafulvalenes with thienoacene spacers. By cyclic and differential pulse voltammetry and in situ EPR/UV-Vis-NIR spectroelectrochemistry, in combination with computations, we have elucidated how the number
Diindenothienoacene–tetrathiafulvalene redox systems
作者:Mikkel A. Christensen、Gabriel E. Rudebusch、Christian R. Parker、Cecilie Lindholm Andersen、Anders Kadziola、Michael M. Haley、Ole Hammerich、Mogens Brøndsted Nielsen
DOI:10.1039/c5ra09581f
日期:——
The redox properties and cation associations of extended tetrathiafulvalenes with diindenothienoacene cores are strongly dependent on the number and regioisomeric structural orientation of the central thiophene units.