Integration of molecular switching units into complex electronic circuits is considered to be the next step toward the realization of novel logic and memory devices. This paper reports on an ordered 2D network of neighboring ternary switching units represented by triazatruxene (TAT) molecules organized in a honeycomb lattice on a Ag(111) surface. Using low-temperature scanning tunneling microscopy, the bonding configurations of individual TAT molecules can be controlled, realizing up to 12 distinct states per molecule.
View Article and Find Full Text PDFWe report on seven new ferrocenyl-(, )- and ferrocenylethynyl-modified ,',″-triethyltriazatruxenes (s) - as well as the dodecyl counterpart of compound and their use as molecular switching units when deposited on a Ag(111) surface. Such functional units may constitute a new approach to molecule-based high-density information storage and processing. Besides the five compounds -, , and , where the 3-fold rotational symmetry of the triazatruxene (TAT) template is preserved, we also included 2-ethynylferrocenyl-TAT and 2,2'-di(ethynylferrocenyl)-TAT , whose mono- and disubstitution patterns break the 3-fold symmetry of the TAT core.
View Article and Find Full Text PDFCareful optimization of the reaction conditions provided access to the particularly small tetraruthenium macrocycle , which is composed out of two redox-active divinylphenylene-bridged diruthenium entities {Ru}-1,4-CH=CH-CH-CH=CH-{Ru} (RuPh; {Ru} = Ru(CO)Cl(PPr)) and two likewise redox-active and potentially non-innocent croconate linkers. According to single X-ray diffraction analysis, the central cavity of is shielded by the bulky PPr ligands, which come into close contact. Cyclic voltammetry revealed two pairs of split anodic waves in the weakly ion pairing CHCl/NBuBAr (BAr = [B{CH(CF)-3,5}] electrolyte, while the third and fourth waves fall together in CHCl/NBuPF.
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