Bimetallic Gold(I) Complexes with Ethynyl‐Helicene and Bis‐Phosphole Ligands: Understanding the Role of Aurophilic Interactions in their Chiroptical Properties
作者:Mehdi El Sayed Moussa、Hui Chen、Zuoyong Wang、Monika Srebro‐Hooper、Nicolas Vanthuyne、Soizic Chevance、Christian Roussel、J. A. Gareth Williams、Jochen Autschbach、Régis Réau、Zheng Duan、Christophe Lescop、Jeanne Crassous
DOI:10.1002/chem.201600126
日期:2016.4.18
Monometallic gold(I)‐alkynyl‐helicene complexes (1 a,b) and bimetallic gold(I)‐alkynyl‐helicene architectures featuring the presence (2 a,b) or absence (3 a,b) of aurophilic intramolecular interactions were prepared by using different types of phosphole ligands (mono‐phosphole L1 or bis‐phospholes L2,3). The influence of the AuI d10 metal center(s) on the electronic, photophysical, and chiroptical
单金属金(I) -炔基-螺烯复合物(1,b)和双金属金(I) -炔基-螺烯结构特色的存在(2,b)或不存在(3,b aurophilic的分子内相互作用的)中制备通过使用不同类型的配体磷杂环的(单-磷杂L1或双- phospholes L2,3)。Au I d 10的影响在这些前所未有的磷脂-金(I)-炔基-螺旋烯配合物的电子,光物理和手性性质上研究了金属中心。实验和理论结果强调配体对配体-类型的电荷转移的重要性和Au的存在或不存在的强烈影响我-Au我相互作用2,b。
Thia[<i>n</i>]helicenes with long persistent phosphorescence
作者:Zhen Sun、Wan Xu、Shuai Qiu、Zhiying Ma、Chunli Li、Sheng Zhang、Hua Wang
DOI:10.1039/d3sc05480b
日期:——
Helicenes with persistent luminescence have received relatively little attention, despite their demonstrated highly efficient intersystemcrossing (ISC) from the excited singlet to the triplet state. Herein, we designed a series of ortho-fused aromatics by combining dithieno[2,3-b:3′,2′-d]thiophene (DTT) with annulated benzene fragments, denoted as TB[n]H (n = 3–8), to achieve persistent luminescence
具有持续发光的螺旋烯受到的关注相对较少,尽管它们被证明具有从激发单线态到三线态的高效系间窜越(ISC)。在此,我们通过将二噻吩并[2,3- b :3′,2′- d ]噻吩( DTT )与环状苯片段结合设计了一系列邻位稠合芳烃,表示为TB[ n ]H ( n = 3– 8)、实现持久发光。其中,thia[ n ]螺旋烯( n =5-8)在77K时表现出强烈的磷光,具有毫秒范围的寿命( τp )。特别有趣的是观察到奇数环螺旋烯比其邻近的环螺旋烯显示出更长的τp值。偶数对应。值得注意的是, TB[7]H的最长τ p为 628 ms。这种现象可归因于旧编号螺旋烯比偶数螺旋烯具有更有利的ISC通道和更强的自旋轨道耦合(SOC)。此外, TB[7]H的两种构象异构体均表现出显着的圆偏振磷光(CPP)响应,发光不对称因子( g lum )分别为0.015和-0.014。这些发现表明硫杂烯可能是一类特定的有机磷光和
Dissymmetrical U-Shaped π-Stacked Supramolecular Assemblies by Using a Dinuclear Cu<sup>I</sup>Clip with Organophosphorus Ligands and Monotopic Fully π-Conjugated Ligands
作者:Mehdi El Sayed Moussa、Kevin Guillois、Wenting Shen、Régis Réau、Jeanne Crassous、Christophe Lescop
DOI:10.1002/chem.201403758
日期:2014.11.3
dimer depend on the nature of the terminal polyaromatic fragment carried by the cyano‐capped monotopicligand, but it does not alter the result of the self‐assembling process. These results demonstrate that the dinuclear molecular clip A that bears short metal–metal distances allows selective supramolecularassembly processes driven by the formation of intra‐ and intermolecular short π–π interactions in
Flash vacuum pyrolysis of 2-substituted benzo[c]phenanthrene has been exploited as a pivotal step in a new, simple synthesis of the ‘bowl-shaped’ hydrocarbon corannulene 1.