Conductance Switching and Photovoltaic Effect of Ru(II) Complex Molecular Junctions: Role of Complex Properties and the Metal/Molecule Interface

Li, Jian‐Chang; Wu, Jun-Zhi; Gong, Xuan

doi:10.1021/jz500167p

Cited by 18 publications

(17 citation statements)

References 34 publications

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“…These studies include monodentate molecules using anchor groups such as thiols [14][15][16][17] amines, 14,18,19 methyl sulfides, 20 selenols, 21,22 cyano, 23,24 isocyanides, 25 nitriles, 26 hydroxyl, 27 ethynylbenzenes, 28 isothiocyanates, 29 pyridines, [30][31][32][33][34] N-heterocyclic carbenes, 35 dimethylphosphine, 36 dihydrobenzo[b]thiophenes, 37 4-(methylthio)phenyl groups, 38 thienyl rings, 39 diphenylphosphines, 40 trimethylsilylethynyl, [41][42][43] tetrathiofulvalenes, 44 triazatriangulenes, 45 and fullerenes. [46][47][48] More recently, bidentate molecules such as carboxylic acids, 47,49,50 carbodithioates, 51,52 dithiocarbamates, 53,54 norbornyldithiol, 55 cathecols, 56 or pyrazole 57 and also multipodal platforms…”

Section: Introductionmentioning

confidence: 99%

Single molecule vs. large area design of molecular electronic devices incorporating an efficient 2-aminepyridine double anchoring group

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Single molecule vs. large area design of molecular electronic devices incorporating an efficient 2-aminepyridine double anchoring group

et al. 2019

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“…[19][20][21] The conductance of the OPE scaffold can also be modulated through the introduction of metal centers [22][23][24][25][26][27][28][29] or metallocene [30][31] fragments within this -conjugated pathway, which augments a fast growing area of study concerning metal coordination complexes as components in molecular electronics. [32][33][34][35][36][37][38][39][40][41][42] To date, the vast majority of metal compounds and complexes studied within metal|molecule|metal junctions or related sandwich structures formed by contacting monolayer films have been based on the Group 8, 9 and 10 metals, for reasons of synthetic availability and redox activity, in an axiallysubstituted arrangement within the wire-like assembly. The presence of supporting equatorial co-ligands is a synthetic necessity and whilst these can be used to create structures that bear topological resemblance to 'insulated' wires, 43 the steric bulk of these equatorial ligands may also prevent close packing of the components.…”

Section: Introductionmentioning

confidence: 99%

Single Gold Atom Containing Oligo(phenylene)ethynylene: Assembly into LB Films and Electrical Characterization

et al. 2014

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Monomolecular films of an Oligo(phenylene)ethynylene (OPE) derivative [2isocyano-1,3-dimethylbenzene][4-(4′-amino-phenylethynyl)-phenylethynyl]-gold, 1, containing a gold atom in the molecule backbone have been prepared by the Langmuir-Blodgett (LB) method in order to study how the electrical properties can be modulated in monolayers of OPEs by the incorporation of a gold center in their structures. UV-vis reflection spectra of Langmuir monolayers of 1 at the air-water interface reveal strong aurophilic interactions between neighbouring molecules that increase upon compression. Monolayer Langmuir-Blodgett (LB) films were readily fabricated by the transfer of Langmuir films of 1 onto solid substrates. Quartz crystal microbalance (QCM) experiments conclusively demonstrate the formation of monolayer LB films with a high surface coverage. The morphology of these films was analysed by atomic force microscopy (AFM), revealing the formation of homogeneous layers with an optimum surface pressure of transference of 6 mN•m-1. Film homogeneity and integrity was confirmed by cyclic voltammetry, with efficient blocking of gold electrodes by these well-formed monolayers of 1. The electrical properties of LB films of 1 were investigated by scanning tunnelling microscopy (STM) using a 'tip-to-contact' method. Symmetrical, sigmoidal-shaped I-V curves were observed, with analysis of the pseudolinear (Ohmic) region giving a conductance value G = 3.9 10-5 G 0 , which is relatively high for an OPE derivative and may indicate a beneficial role of metal atom incorporation within the wire-like-system.

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“…Among the suitable transition metal centers, Ru is highly attractive since Ru(TP) 2 -complexes show intense metal-to-ligand charge transfer absorption bands and a relatively long lifetime of the triplet state as well as voltage-driven molecular switching in solid-state molecular junctions [11][12][13][14][15]. In addition, Ru(TP) 2 -complexes and the corresponding supramolecular wires exhibit a rod-like structure, which makes them superior candidates for charge transport studies and functional nanodevices [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Impact of device design on the electronic and optoelectronic properties of integrated Ru-terpyridine complexes

Mennicken

Peter

Kaulen

et al. 2022

Beilstein J. Nanotechnol.

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The performance of nanoelectronic and molecular electronic devices relies strongly on the employed functional units and their addressability, which is often a matter of appropriate interfaces and device design. Here, we compare two promising designs to build solid-state electronic devices utilizing the same functional unit. Optically addressable Ru-terpyridine complexes were incorporated in supramolecular wires or employed as ligands of gold nanoparticles and contacted by nanoelectrodes. The resulting small-area nanodevices were thoroughly electrically characterized as a function of temperature and light exposure. Differences in the resulting device conductance could be attributed to the device design and the respective transport mechanism, that is, thermally activated hopping conduction in the case of Ru-terpyridine wire devices or sequential tunneling in nanoparticle-based devices. Furthermore, the conductance switching of nanoparticle-based devices upon 530 nm irradiation was attributed to plasmon-induced metal-to-ligand charge transfer in the Ru-terpyridine complexes used as switching ligands. Finally, our results reveal a superior device performance of nanoparticle-based devices compared to molecular wire devices based on Ru-terpyridine complexes as functional units.

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Conductance Switching and Photovoltaic Effect of Ru(II) Complex Molecular Junctions: Role of Complex Properties and the Metal/Molecule Interface

Cited by 18 publications

References 34 publications

Single molecule vs. large area design of molecular electronic devices incorporating an efficient 2-aminepyridine double anchoring group

Single molecule vs. large area design of molecular electronic devices incorporating an efficient 2-aminepyridine double anchoring group

Single Gold Atom Containing Oligo(phenylene)ethynylene: Assembly into LB Films and Electrical Characterization

Impact of device design on the electronic and optoelectronic properties of integrated Ru-terpyridine complexes

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