Synthesis of electron deficient acene derivatives via a bidirectional iterative elongation reaction
作者:Yi-Chun Lin、Chih-Hsiu Lin、Chan-Yu Chen、Shih-Sheng Sun、Bikash Pal
DOI:10.1039/c0ob00575d
日期:——
bidirectional synthesis, and we can now make a series of electrondeficient anthracene, tetracene, and pentacene derivatives via the bidirectional iterative elongation protocol. Central units, used to initiate the bidirectional elongation, were synthesized by employing a double anionic Fries rearrangement as the key step. The photophysical and electrochemical properties of these novel electron acceptors
Novel Cruciform Structures as Model Compounds for Coordination Induced Single Molecule Switches
作者:Sergio Grunder、Roman Huber、Songmei Wu、Christian Schönenberger、Michel Calame、Marcel Mayor
DOI:10.2533/chimia.2010.140
日期:——
synthesized various molecular cruciforms consisting of two different crossing n-systems and comprising crosswise arranged thiol- and pyridine-anchor groups. With these modelcompounds we strive towards the investigation of a new switching concept based on the potential dependent coordination of pyridines to gold electrodes in an electrochemical set-up. Integration of these cruciform molecules between both
New Cruciform Structures: Toward Coordination Induced Single Molecule Switches
作者:Sergio Grunder、Roman Huber、Viviana Horhoiu、Maria Teresa González、Christian Schönenberger、Michel Calame、Marcel Mayor
DOI:10.1021/jo7013998
日期:2007.10.1
Newcruciform structures 1−4 were synthesized to investigate a new single molecule switching mechanism arising from the interplay between the molecule and the electrode surface. These molecular cruxes consist of two rod-type substructures, namely an oligophenylenevinylene and an oligophenyleneethynyl. While the oligophenylenevinylene rods are functionalized with acetyl protected sulfur anchor groups
capability in inhibiting molecular motion. Herein, we describe the dynamic properties of a series of molecular turnstiles consisting of a rigid frame and a phenyl rotator flanked with linear alkoxymethyl substituents. The long, flexible substituents act as elastic baffles to inhibit the rotations of the rotator at medium to fast speeds on the NMR time scale. When the rotator moves slowly, the substituents
A Doubly Bridged Bis(phenylethynyl)benzene: Different from a Twisted Tolan
作者:Manuel Hodecker、Yury Kozhemyakin、Svenja Weigold、Frank Rominger、Jan Freudenberg、Andreas Dreuw、Uwe H. F. Bunz
DOI:10.1002/chem.202002552
日期:2020.12.18
The synthesis of a doubly bridged 1,4‐bis(phenylethynyl)benzene is reported. The target displays photophysical properties, distinctly different from that of its congeners, the singly bridged tolans. Quantum‐chemical calculations suggest a lack of planarization of the bridged bis(phenylethynyl)benzene in the first excited state.