The author of 《Exploring antiaromaticity in single-molecule junctions formed from biphenylene derivatives》 were Gantenbein, Markus; Li, Xiaohui; Sangtarash, Sara; Bai, Jie; Olsen, Gunnar; Alqorashi, Afaf; Hong, Wenjing; Lambert, Colin J.; Bryce, Martin R.. And the article was published in Nanoscale in 2019. Related Products of 2510-22-7 The author mentioned the following in the article:
We report the synthesis of a series of oligophenylene-ethynylene (OPE) derivatives with biphenylene core units, designed to assess the effects of biphenylene antiaromaticity on charge transport in mol. junctions. Analogs with naphthalene, anthracene, fluorene and biphenyl cores are studied for comparison. The mols. are terminated with pyridyl or methylthio units. Single-mol. conductance data were obtained using the mech. controllable break junction (MCBJ) technique. It is found that when electrons pass from one electrode to the other via a phenylene ring, the elec. conductance is almost independent of the nature of the pendant π-systems attached to the phenylene ring and is rather insensitive to antiaromaticity. When electrons pass through the cyclobutadiene core of the biphenylene unit, transport is sensitive to the presence of the relatively weak single bonds connecting the two phenylene rings of biphenylene, which arise from partial antiaromaticity within the cyclobutadiene core. This leads to a negligible difference in the mol. conductance compared to the fluorene or biphenyl analogs which have standard single bonds. This ability to tune the conductance of mol. cores has no analog in junctions formed from artificial quantum dots and reflects the quantum nature of electron transport in mol. junctions, even at room temperature In the experiment, the researchers used 4-Ethynylpyridine(cas: 2510-22-7Related Products of 2510-22-7)
4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. When pyridine is adsorbed on oxide surfaces or in porous materials, the following species are commonly observed: (i) pyridine coordinated to Lewis acid sites, (ii) pyridine H-bonded to weakly acidic hydroxyls, and (iii) protonated pyridine. At high coverage, physisorbed pyridine and protonated dimers can also be observed.Related Products of 2510-22-7