films. In the crystalline samples of three dyads, the TTF moieties formed 1D conducting columns through the dimerization of the TTF moieties and relatively strong side-by-side interactions between neighbouring stacking columns. All the neutral crystals exhibited photoinduced conductivity along the stacking direction of the TTF moieties and the crystal with the weakest dimerization and the strongest side-by-side
Long-Lived Charge Separation in Novel Axial Donor-Porphyrin-Acceptor Triads Based on Tetrathiafulvalene, Aluminum(III) Porphyrin and Naphthalenediimide
作者:Prashanth K. Poddutoori、Niloofar Zarrabi、Andrey G. Moiseev、Roger Gumbau-Brisa、Serguei Vassiliev、Art van der Est
DOI:10.1002/chem.201202995
日期:2013.2.25
4‐(n‐pentyl)‐4′‐cyanobiphenyl (5CB), a spin‐polarized transient EPR spectrum that is readily assigned to the weakly coupled radicalpair TTF.+NDI.− is obtained. The initial polarization pattern indicates that the charge separation occurs through the singlet channel and that singlet–tripletmixing occurs in the primary radicalpair. At later time the polarization pattern inverts as a result of depopulation
据报道有两个自组装的超分子供体-受体三联体,包括三价卟啉(AlPor)和轴向结合的萘二酰亚胺(NDI)作为受体,四硫富瓦烯(TTF)作为次级供体。在三单元组中,NDI和TTF单元分别通过共价键和配位键连接到卟啉相对面上的Al III。荧光研究表明,卟啉的最低激发单重态通过电子转移到NDI和空穴转移到TTF猝灭。在二氯甲烷中,空穴转移至TTF占主导,而在苄腈(BN)中,电子转移至NDI是主要的淬灭途径。在液晶溶剂的向列相中4-(n-戊基)-4'-氰基联苯(5CB),它是一种自旋极化的瞬态EPR谱,可以轻松分配给弱耦合的自由基对TTF 。+ NDI .-。初始极化模式表明,电荷分离是通过单线态通道发生的,并且单线态-三重态混合发生在初级自由基对中。在稍后的时间,由于通过重组为基态而使具有单重态特征的状态减少,极化模式反转。TTF 。+ NDI .-的单重态寿命估计为200–300 ns,而X波段EPR光谱仪在大约350
Synthesis and some properties of bis- and tetrakis(triphenylstannyl) tetrathiafulvalenes and tetraiodotetrathiafulvalene
作者:Masaru Sato、Masa-aki Sensui
DOI:10.1016/s0022-328x(96)06913-6
日期:1997.6
Bis- and tetrakis(triphenylstannyl)tetrathiafulvalenes were prepared from the corresponding lithio-derivatives and chlorotriphenyltin, and their structures were determined by X-ray analysis. Their absorption maxima in the electronic spectrum showed a bathochromic shift. Their redox potentials shifted only a little to a lower region. The charge-transfer complex of the tetra-substituted derivative with
由相应的硫代衍生物和氯代三苯基锡制备了双(三苯基锡烷基)和四(三苯基锡烷基)四硫富瓦烯,并通过X射线分析确定了它们的结构。它们在电子光谱中的吸收最大值显示出红移。它们的氧化还原电势仅转移到较低的区域。分离了四取代衍生物与TCNQ的电荷转移络合物。双(三甲基锡烷基)四硫富瓦烯不与(η- Cp)(CO)2 FeI反应,与(COD)PtCl 2反应,然后添加三丁基膦,得到复杂的混合物,由该混合物可以得到(C 2 H 2 S 2)铂(PBu 3)2分离产率低。通过X射线衍射确认了结构。还报道了方便的四硫富瓦烯和四碘四硫富瓦烯的制备方法。
Development of Organic Conductors with Self-Assembled Architectures of Biomolecules: Synthesis and Crystal Structures of Nucleobase-Functionalized Tetrathiafulvalene Derivatives
Supramolecular assemblies and charge-transfer complexes of new nucleobase-functionalized tetrathiafulvalene (TTF) derivatives were investigated. Stille-type cross-coupling reaction between tributylstannylated TTF and iodinated nucleobase derivatives yielded mono- and bisnucleobase-substituted TTF derivatives. The electrochemical measurements revealed that the uracil- and cytosine-substituted derivatives possessed strong electron-donating abilities comparable to that of pristine TTF, and the electron-deficient features of adenine and guanine caused high potential shifts of the oxidation waves. In the solution-state electronic spectra, the intramolecular charge-transfer absorption bands were observed at a low-energy region. In the crystal structures, the donor molecules constructed supramolecular polymers by the complementary hydrogen-bonds inherent in nucleobases; a one-dimensional zigzag chain in the adenine-substituted derivative and a linear chain in the bis(uracil)-substituted derivative. The tetracyanoquinodimethane complexes of uracil- and cytosine-substituted derivatives possessed a mixed valence state exhibiting high conductivities (room-temperature conductivities = 10−2–10−1 S cm−1). In the cyananilic acid complexes, cytosine- and adenine-substituted TTF acted as electron-donors and proton-acceptors to yield simultaneous charge- and proton-transfer complexes.
研究了新型核苷碱功能化的四硫富瓦烯(TTF)衍生物的超分子聚集体和电荷转移复合物。通过斯蒂尔反应,三正丁基锡化的TTF与碘化核苷碱衍生物之间进行了交叉偶联反应,产生了单核苷碱和双核苷碱取代的TTF衍生物。电化学测量表明,取代有尿嘧啶和胞嘧啶的衍生物具有强的电子给体能力, comparable 于纯净的TTF,而腺嘌呤和鸟嘌呤的电子缺乏特征导致了氧化波的高电位移。在溶液态的电子光谱中,观察到了低能量区域的分子内电荷转移吸收带。在晶体结构中,供体分子通过核苷碱固有的互补氢键构建了超分子聚合物;腺嘌呤取代的衍生物形成了一维之字形链,而二尿嘧啶取代的衍生物形成了一条线性链。取代有尿嘧啶和胞嘧啶的四氰基奎烯和二烯复合物具有混合价态,表现出高电导率(室温电导率 = 10−2–10−1 S cm−1)。在氰苯基酸复合物中,胞嘧啶和腺嘌呤取代的TTF作为电子供体和质子受体,形成了同时进行电荷和质子转移的复合物。
Palladium-catalysed coupling of trialkylstannyltetrathiafulvalenes with aryl halides
作者:Masahiko Iyoda、Yoshiyuki Kuwatani、Nubuhiko Ueno、Masaji Oda
DOI:10.1039/c39920000158
日期:——
undergo palladium-catalysed cross-and homo-coupling reactions to give aryl-substituted tetrathiafulvalenes and bitetrathiafulvalene; the methodology has been applied to the synthesis of p-phenylenebistetrathiafulvalene and 2,5-thiophenediylbistetrathiafulvalene