Molecular Devices

Boudalis, Athanassios K.; Kumar, Kuppusamy Senthil; Rüben, Mario

doi:10.1016/b978-0-08-102688-5.00061-1

Cited by 3 publications

(3 citation statements)

References 221 publications

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“…At the single-molecule level, intermolecular interactions cease to exist, and spin-state switching is achieved by applying a stimulus under isothermal conditions. − Charging of ligands, electric field-induced distortion of a molecule featuring a large dipole moment, and stretching a molecule in a single-molecule junction are some methods used to induce SCO at the single-molecule level. Electron-induced spin-state switching at the single-molecule level in surface-bound thin films of SCO active molecules has also been demonstrated in scanning tunneling microscope (STM) junctions at 2 K. − The spin-state switching at the single-molecule level is accompanied by conductance switching, and high-spin (HS) junctions show a spin-filtering effect, , elucidating the utility of spin-switchable molecular junctions as molecular spintronics elements.…”

Section: Introductionmentioning

confidence: 99%

Spin-Crossover in Supramolecular Iron(II)–2,6-bis(1H-Pyrazol-1-yl)pyridine Complexes: Toward Spin-State Switchable Single-Molecule Junctions

et al. 2022

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Spin-crossover (SCO) active iron(II) complexes are an integral class of switchable and bistable molecular materials. Spin-state switching properties of the SCO complexes have been studied in the bulk and single-molecule levels to progress toward fabricating molecule-based switching and memory elements. Supramolecular SCO complexes featuring anchoring groups for metallic electrodes, for example, gold (Au), are ideal candidates to study spin-state switching at the single-molecule level. In this study, we report on the spin-state switching characteristics of supramolecular iron(II) complexes 1 and 2 composed of functional 4-([2,2′-bithiophen]-5-ylethynyl)-2,6-di(1 H -pyrazol-1-yl)pyridine ( L1 ) and 4-(2-(5-(5-hexylthiophen-2-yl)thiophen-2-yl)ethynyl)-2,6-di(1 H -pyrazol-1-yl)pyridine ( L2 ) ligands, respectively. Density functional theory (DFT) studies revealed stretching-induced spin-state switching in a molecular junction composed of complex 1 , taken as a representative example, and gold electrodes. Single-molecule conductance traces revealed the unfavorable orientation of the complexes in the junctions to demonstrate the spin-state dependence of the conductance.

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Section: Introductionmentioning

confidence: 99%

Spin-Crossover in Supramolecular Iron(II)–2,6-bis(1H-Pyrazol-1-yl)pyridine Complexes: Toward Spin-State Switchable Single-Molecule Junctions

et al. 2022

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“…This combined approach is very rare and has allowed us to bring forth finer, and previously unobserved, details of the magnetic structures of these systems. These are particularly relevant regarding surface deposition of such molecules for the construction of molecular devices, a domain in which the [Ln(pc)] • platform has been shown to be particularly adapted . The details of the molecular conformation of such surface-deposited molecules would be a critical parameter in their utility as device components.…”

Section: Discussionmentioning

confidence: 99%

Molecular-Engineered Biradicals Based on the Y^III-Phthalocyanine Platform

et al. 2023

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A mixed-ligand phthalocyanine/porphyrin yttrium(III) radical doubledecker complex (DD) was synthesized using the custom-made 5,10,15-tris(4methoxyphenyl)-20-(4-((trimethylsilyl)ethynyl)phenyl)porphyrin. The trimethylsilyl functionality was then used to couple two such complexes into biradicals through rigid tethers. Glaser coupling was used to synthesize a short-tethered biradical (C1) and Sonogashira coupling to synthesize longer-tethered ones (C2 and C3). Field-swept echo-detected (FSED), saturation recovery, and spin nutation-pulsed electron paramagnetic resonance experiments revealed marked similarities of the magnetic properties of DD with those of the parent [Y(pc) 2 ] • complex, both in the solid state and in CD 2 Cl 2 /CDCl 3 4:1 frozen glasses. FSED experiments on the biradicals C2 and C3 revealed a spectral broadening with respect to the spectra of DD and [Y(pc) 2 ] • assigned to the effect of dipolar interactions in solution. Apart from the main resonance, satellite features were also observed, which were simulated with dipole− dipole pairs of shortest distances, suggesting spin delocalization on the organic tether. FSED experiments on C1 yielded spectral line shapes that could not be simulated as the integration of the off-resonance echoes was complicated by field-dependent modulations. While, for all dimers, the on-resonance spin nutation experiments yielded Rabi oscillations of the same frequencies, off-resonance nutations on C1 yielded Rabi oscillations that could be assigned to a M S = −1 to M S = 0 transition within a S = 1 multiplet. The DFT calculations showed that the trans conformation of the complexes was significantly more stable than the cis one and that it induced a marked spin delocalization over the rigid organic tether. This "spin leakage" was most pronounced for the shortest biradical C1.

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“…This property makes them an attractive framework for the construction of molecular quantum devices, to sense small structural changes in the environment. 19 Magnetoelectricity further extends the versatility of spin triangles enabling magnetic (electric) sensing detected via electric (magnetic) read-out. However, before molecular spin triangles can be practically implemented in quantum sensing devices, we must first overcome challenges associated with material handling and film preparation.…”

Section: Introductionmentioning

confidence: 99%

Matrix effects on the magnetic properties of a molecular spin triangle embedded in a polymeric film

Tesi,

Boudalis,

Drerup

et al. 2024

Phys. Chem. Chem. Phys.

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Molecular Devices

Cited by 3 publications

References 221 publications

Spin-Crossover in Supramolecular Iron(II)–2,6-bis(1H-Pyrazol-1-yl)pyridine Complexes: Toward Spin-State Switchable Single-Molecule Junctions

Spin-Crossover in Supramolecular Iron(II)–2,6-bis(1H-Pyrazol-1-yl)pyridine Complexes: Toward Spin-State Switchable Single-Molecule Junctions

Molecular-Engineered Biradicals Based on the Y^III-Phthalocyanine Platform

Matrix effects on the magnetic properties of a molecular spin triangle embedded in a polymeric film

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Molecular Devices

Cited by 3 publications

References 221 publications

Spin-Crossover in Supramolecular Iron(II)–2,6-bis(1H-Pyrazol-1-yl)pyridine Complexes: Toward Spin-State Switchable Single-Molecule Junctions

Spin-Crossover in Supramolecular Iron(II)–2,6-bis(1H-Pyrazol-1-yl)pyridine Complexes: Toward Spin-State Switchable Single-Molecule Junctions

Molecular-Engineered Biradicals Based on the YIII-Phthalocyanine Platform

Matrix effects on the magnetic properties of a molecular spin triangle embedded in a polymeric film

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Product

Resources

About

Molecular-Engineered Biradicals Based on the Y^III-Phthalocyanine Platform