Toward Metal Complexes That Can Directionally Walk Along Tracks: Controlled Stepping of a Molecular Biped with a Palladium(II) Foot
作者:Jonathon E. Beves、Victor Blanco、Barry A. Blight、Romen Carrillo、Daniel M. D’Souza、David Howgego、David A. Leigh、Alexandra M. Z. Slawin、Mark D. Symes
DOI:10.1021/ja4123973
日期:2014.2.5
report on the design, synthesis, and operation of a bimetallic molecular biped on a three-foothold track. The "walker" features a palladium(II) complex "foot" that can be selectively stepped between 4-dimethylaminopyridine and pyridine ligand sites on the track via reversible protonation while the walker remains attached to the track throughout by means of a kinetically inert platinum(II) complex foot. The
我们报告了双金属分子双足动物在三足轨道上的设计、合成和操作。“助行器”具有钯 (II) 复合“脚”,可以通过可逆质子化选择性地在轨道上的 4-二甲氨基吡啶和吡啶配体位点之间移动,而助行器通过动力学惰性的铂始终保持附着在轨道上( II) 复足。三个配体结合位点的取代模式,连同金属-配体配位键的动力学稳定性,为两个位置异构体提供了高度的亚稳定性,这意味着改变轨道的化学状态不会自动引发步入没有额外的刺激(在配位溶剂存在下加热)。
Turning the Tap: Conformational Control of Quantum Interference to Modulate Single‐Molecule Conductance
作者:Feng Jiang、Douglas I. Trupp、Norah Algethami、Haining Zheng、Wenxiang He、Afaf Alqorashi、Chenxu Zhu、Chun Tang、Ruihao Li、Junyang Liu、Hatef Sadeghi、Jia Shi、Ross Davidson、Marcus Korb、Alexandre N. Sobolev、Masnun Naher、Sara Sangtarash、Paul J. Low、Wenjing Hong、Colin J. Lambert
DOI:10.1002/anie.201909461
日期:2019.12.19
recognized conductance mechanisms of charge-hopping and tunneling, quantum-interference (QI) phenomena have been identified as important factors affecting charge transport through molecules. Consequently, establishing simple and flexible molecular-design strategies to understand, control, and exploit QI in molecular junctions poses an exciting challenge. Here we demonstrate that destructive quantum interference
Mechanochemical Desymmetrization of Unbiased Bis‐ and Tris‐alkynes to Access 3,5‐Isoxazoles‐Alkyne Adducts and Unsymmetrical Bis‐3,5‐isoxazoles**
作者:Rafael A. Hernandez、Irini Trakakis、Jean‐Louis Do、Louis A. Cuccia、Tomislav Friščić、Pat Forgione
DOI:10.1002/ejoc.202300374
日期:2023.8
A mechanochemical desymmetrization of symmetrical bis- and tris-alkynes via a controlled 1,3-dipolar cycloaddition reaction with nitrile oxide dipoles has been developed. This convenient, efficient, and simple protocol allows access to a wide range of 3,5-isoxazole-alkyne adducts and unsymmetrical bis-3,5-isoxazoles from easily prepared or commercially available symmetrical bis- and tris-alkynes in
Certain polyphenylene oligomers having good solvent strip resistance, low coefficient of thermal expansion and good adhesion to a variety of surfaces are useful as thin-film dielectric materials in electronics applications.
Compositions of arylene oligomers and certain curing agents are useful to provide arylene polymer coatings having improved mechanical properties when cured in an oxygen-containing atmosphere. Methods of curing such compositions are also provided.