Molecular diodes with rectification ratios exceeding 105 driven by electrostatic interactions was written by Chen, Xiaoping;Roemer, Max;Yuan, Li;Du, Wei;Thompson, Damien;del Barco, Enrique;Nijhuis, Christian A.. And the article was included in Nature Nanotechnology in 2017.Reference of 56523-59-2 This article mentions the following:
Mol. diodes operating in the tunnelling regime are intrinsically limited to a maximum rectification ratio R of ∼103. To enhance this rectification ratio to values comparable to those of conventional diodes (R ≥ 105) an alternative mechanism of rectification is therefore required. Here, the authors report a mol. diode with R = 6.3 × 105 based on self-assembled monolayers with Fc-C≃C-Fc (Fc, ferrocenyl) termini. The number of mols. (n(V)) involved in the charge transport changes with the polarity of the applied bias. More specifically, n(V) increases at forward bias because of an attractive electrostatic force between the pos. charged Fc units and the neg. charged top electrode, but remains constant at reverse bias when the Fc units are neutral and interact weakly with the pos. charged electrode. The authors successfully model this mechanism using mol. dynamics calculations In the experiment, the researchers used many compounds, for example, 15-Bromopentadecanoic acid (cas: 56523-59-2Reference of 56523-59-2).
15-Bromopentadecanoic acid (cas: 56523-59-2) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. Organobromine compounds have fallen under increased scrutiny for their environmental impact. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Reference of 56523-59-2
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary