Ferrocene as an iconic redox marker: From solution chemistry to molecular electronic devices

Roy, Gargee; Gupta, Ritu; Sahoo, Sauvagya Ranjan; Saha, Sumit Kumar; Asthana, Deepak; Mondal, Prakash Chandra

doi:10.1016/j.ccr.2022.214816

Cited by 31 publications

(19 citation statements)

References 133 publications

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“…In order to probe the host‐guest ability of the Hamilton receptor, we rationally designed and synthesized a barbiturate analogue, bearing Fc as redox indicator (Scheme 1). [35] Evidently, Fc's molecular framework stability and its ease of derivatization on the cyclopentadienyl ring are adding to its profound rapid reversible Fc/Fc + redox activity, making it an ideal candidate as a building block for the design of tracking/sensing functional systems [39] . In our case, Fc serves as an easy and simple electrochemical tracer to prove the successful trapping of barbiturates by the Hamilton‐modified MoS 2 platform via multiple hydrogen bonding.…”

Section: Resultsmentioning

confidence: 91%

Covalently Modified MoS₂ Bearing a Hamilton‐Type Receptor for Recognizing a Redox‐Active Ferrocene‐Barbiturate Guest via Multiple H‐Bonds

Sideri,

Stangel,

Stergiou

et al. 2023

Chemistry A European J

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The covalent modification of the metallic phase of MoS2 with a Hamilton‐type ligand is presented, transforming MoS2 to a recognition platform which is able to embrace barbiturate moieties via hydrogen bonding. The successful hydrogen bonding formation is easily monitored by simple electrochemical assessments, if a ferrocene‐labeled barbiturate analogue is utilized as a proof of concept. Full spectroscopic, thermal, and electron microscopy imaging characterization is provided for the newly formed recognition system, along with valuable insights concerning the electrochemical sensing. The given methodology expands beyond the sensing applications, confidently entering the territory of supramolecular interactions on the surface of 2D transition metal dichalcogenides. The well‐designed host‐guest chemistry presented herein, constitutes a guide and an inspiration for hosting customized‐structured functional building blocks on MoS2 and its relatives via hydrogen bonding, opening up new opportunities regarding potential applications.

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Section: Resultsmentioning

confidence: 91%

Covalently Modified MoS₂ Bearing a Hamilton‐Type Receptor for Recognizing a Redox‐Active Ferrocene‐Barbiturate Guest via Multiple H‐Bonds

Sideri,

Stangel,

Stergiou

et al. 2023

Chemistry A European J

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“…The reversible behavior is diffusion less mass transport process, an indicative of fast electrochemical kinetics, very similar to the ferrocene redox chemistry. [ 22 ] The current density (mA/cm 2 ), even without double layer contribution (capacitive current) for both the reduced species, shows relatively higher than that of oxidized species ( I pc / I pa >1), ensuring a strong tendency to uptake the electron from the Fermi level ( E F ) of ITO to its unoccupied molecular orbitals. The voltammogram shows two distinct reduction peaks well‐separated by 450 mV and two oxidations are separated by 430 mV, indicating efficient generation of bi‐stable redox species without overlapping each other.…”

Section: Resultsmentioning

confidence: 99%

Flexible Molecular Electrochromic Devices Run by Low‐Cost Commercial Cells

Parashar

Kandpal

Bandyopadhyay

et al. 2023

Advanced Optical Materials

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The present era has seen tremendous demands for low-cost electrochromic materials for visible-region multicolor display technology, paper-based, flexible, and wearable electronic devices, smart windows, and optoelectronic applications. Towards this goal, the authors report large-scale, high-yield and robust polyelectrochromic devices fabricated on rigid to flexible ITO substrates comprising novel anthracene containing viologen, (1,1″-bis(anthracen-9-ylmethyl)-[4,4″-bipyridine]-1,1'-diium bromide, abbreviated as AnV 2+ ), and polythiophene (P3HT). Interestingly, the devices show three states of reversible visible color in response to the applied bias, sub-second to second switching time (0.7 s/1.6 s), high coloration efficiency (484 cm 2 /C), and longer cycling stability up to 9,000 s (3,000 switching cycles). Introduction of the anthracene moieties to viologen inhibits the formation of an undesired dimer of cation radicals in response to the applied bias, otherwise the device's color-switching would be hampered when the bias polarity is reversed. The fabricated electrochromic devices are tested with commercially available low-cost cells to perform-a unique approach toward practical applications. The computational study facilitates the understanding of experimental results. Alternating current (AC)-based electrical impedance spectroscopy reveals that P3HT facilitates enhanced charge transfer to AnV 2+ . This work shows CMOS compatibility and can pave the way for developing cost-effective flexible and wearable electrochromic devices.

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“…The CV was performed using 5 mM ferrocene (Fc), a redox, considering Fc as a universal redox probe to understand the electronic effect of pyrene film [64] . A clear reversible redox signature of Fc to Fc + (ferrocene to ferrocenium) was achieved with bare ITO.…”

Section: Resultsmentioning

confidence: 99%

Chemical Approach Towards Broadband Spintronics on Nanoscale Pyrene Films

et al. 2023

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The injection of pure spin current into the non‐magnetic layer plays a crucial role in transmitting, processing, and storing data information in the realm of spintronics. To understand broadband molecular spintronics, pyrene oligomer film (≈20 nm thickness) was prepared using an electrochemical method forming indium tin oxide (ITO) electrode/pyrene covalent interfaces. Permalloy (Ni80Fe20) films with different nanoscale thicknesses were used as top contact over ITO/pyrene layers to estimate the spin pumping efficiency across the interfaces using broadband ferromagnetic resonance spectra. The spintronic devices are composed of permalloy/pyrene/ITO orthogonal configuration, showing remarkable spin pumping from permalloy to pyrene film. The large spin pumping is evident from the linewidth broadening of 5.4 mT at 9 GHz, which is direct proof of spin angular momentum transfer across the interface. A striking observation is made with the high spin‐mixing conductance of ≈1.02×1018 m−2, a value comparable to the conventional heavy metals. Large spin angular moment transfer was observed at the permalloy‐pyrene interfaces, especially at the lower thickness of permalloy, indicating a strong spinterface effect. Pure spin current injection from ferromagnetic into electrochemically grown pyrene films ensures efficient broadband spin transport, which opens a new area in molecular broadband spintronics.

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Ferrocene as an iconic redox marker: From solution chemistry to molecular electronic devices

Cited by 31 publications

References 133 publications

Covalently Modified MoS₂ Bearing a Hamilton‐Type Receptor for Recognizing a Redox‐Active Ferrocene‐Barbiturate Guest via Multiple H‐Bonds

Covalently Modified MoS₂ Bearing a Hamilton‐Type Receptor for Recognizing a Redox‐Active Ferrocene‐Barbiturate Guest via Multiple H‐Bonds

Flexible Molecular Electrochromic Devices Run by Low‐Cost Commercial Cells

Chemical Approach Towards Broadband Spintronics on Nanoscale Pyrene Films

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Ferrocene as an iconic redox marker: From solution chemistry to molecular electronic devices

Cited by 31 publications

References 133 publications

Covalently Modified MoS2 Bearing a Hamilton‐Type Receptor for Recognizing a Redox‐Active Ferrocene‐Barbiturate Guest via Multiple H‐Bonds

Covalently Modified MoS2 Bearing a Hamilton‐Type Receptor for Recognizing a Redox‐Active Ferrocene‐Barbiturate Guest via Multiple H‐Bonds

Flexible Molecular Electrochromic Devices Run by Low‐Cost Commercial Cells

Chemical Approach Towards Broadband Spintronics on Nanoscale Pyrene Films

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Product

Resources

About

Covalently Modified MoS₂ Bearing a Hamilton‐Type Receptor for Recognizing a Redox‐Active Ferrocene‐Barbiturate Guest via Multiple H‐Bonds

Covalently Modified MoS₂ Bearing a Hamilton‐Type Receptor for Recognizing a Redox‐Active Ferrocene‐Barbiturate Guest via Multiple H‐Bonds