Role of the Electron Spin Polarization in Water Splitting

Mtangi, Wilbert; Kiran, Vankayala; Fontanesi, Claudio; Naaman, Ron

doi:10.1021/acs.jpclett.5b02419

Cited by 188 publications

(200 citation statements)

References 45 publications

Supporting

Mentioning

192

Contrasting

Order By: Relevance

“…Altogether, the results reported in ref. are well consistent with chiral molecules being good spin filters reported by others.…”

Section: Water Splitting Using Chiral Moleculessupporting

confidence: 92%

“…Beyond the effect on the onset in the water-splitting process, the amount of evolved hydrogen has been collected and quantified. [35] The amount of evolved hydrogen as a function of time has been compared with chiral organic linkers ( Figure 12A) and achiral molecules ( Figure 12B). It can be observed that the amount of hydrogen collected when chiral molecules are employed is significantly larger than that which is obtained with achiral ones, keeping other conditions identical.…”

Section: Tio 2 Functionalized With Chiral Versus Achiral Molecules Fomentioning

confidence: 99%

“…Reproduced with permission. [35] Copyright 2015, American Chemical Society. efficiently oxidize water, in comparison to their achiral counterparts, as witnessed from the measured photocurrent densities.…”

Section: Figure 12mentioning

confidence: 99%

See 2 more Smart Citations

Chiro‐Spintronics: Spin‐Dependent Electrochemistry and Water Splitting Using Chiral Molecular Films

2018

Self Cite

View full text Add to dashboard Cite

Molecular spintronics or spin‐based electronics, which utilizes both the spin degrees of freedom and electron charge, has become a hot topic in modern science. Since the introduction of spintronics in 1988, many efforts have been devoted to controlling spin‐polarized current using an external magnetic field, leading to the implementation of commercial solid‐state devices based on the giant magnetoresistance effect. In molecular spintronics, much progress has been achieved with organic molecules, but the role played by chiral molecules is yet to be explored in detail, while it promises to play a role in the future. It has been proved that the interaction of electrons with chiral molecules is spin specific, as supported by several experimental tools, and by theoretical studies. This effect is named “chiral‐induced spin selectivity” (CISS). CISS is based on the fact that chiral molecules exhibit spin‐specific transport properties, and hence can be used as a substitute for ferromagnetic materials. Here, recent spin‐dependent electrochemistry results are highlighted, where chiral molecules are immobilized on a ferromagnetic electrode. Practical applications of the CISS effect, for spin control of charge transport in complex molecular architectures, and in the water‐splitting process are also reviewed.

show abstract

“…Altogether, the results reported in ref. are well consistent with chiral molecules being good spin filters reported by others.…”

Section: Water Splitting Using Chiral Moleculessupporting

confidence: 92%

Section: Tio 2 Functionalized With Chiral Versus Achiral Molecules Fomentioning

confidence: 99%

See 1 more Smart Citation

Chiro‐Spintronics: Spin‐Dependent Electrochemistry and Water Splitting Using Chiral Molecular Films

2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although spin is rarely discussed in works exploring artificial photosynthesis, recent theoretical studies suggest that the overpotential required to split water is linked to restrictions on the electrons’ spin in generating a ground state triplet oxygen molecule ,. In a recent experimental work, it has been shown that when the anode in the water‐splitting cell is coated with chiral molecules, the overpotential is reduced …”

Section: The Ciss Effectmentioning

confidence: 99%

Chirality – Beyond the Structural Effects

Naaman

2016

Israel Journal of Chemistry

Self Cite

View full text Add to dashboard Cite

Usually, when one refers to chirality, one focuses on the structural properties of the molecules. This review focuses on the interesting electronic properties of these molecules, and specifically, on the interrelation between the spin of the electrons transmitted through molecules and the chiral structure of these molecules. This relation is expressed in the chiral‐induced spin selectivity (CISS) effect, which is described, including some of its implications. Specifically, several applications are described, in spintronics, in spin‐specific reactivity, and in spin‐controlled multiple‐electron oxidation processes. In the latter, experimental results are described that demonstrate that by coating the anode of a photoelectrochemical cell with chiral molecules, the overpotential of the water‐splitting process can be reduced.

show abstract

“…[8] Recently a possible solution to this problem was proposed by Ron Naaman and was demonstrated in collaboration with our group. [12,13] The functionalization of TiO 2 anodes with chiral supramolecular polymers that are able to act as spin filters -through an effect called chiral induced spin selectivity (CISS) [14] -demonstrated the possibility of simultaneously reducing the production of H 2 O 2 and increasing the current.…”

Section: Introductionmentioning

confidence: 99%

Chiral Aggregates of Triphenylamine‐Based Dyes for Depleting the Production of Hydrogen Peroxide in the Photochemical Water‐Splitting Process

Adelizzi

Rösch

Rijen

et al. 2019

Helvetica Chimica Acta

View full text Add to dashboard Cite

Recent studies on water‐splitting photoelectrochemical cells (PECs) have demonstrated the intriguing possibility of controlling the spin state in this chemical reaction to form H2 and O2 by exploiting the chirality of organic π‐conjugated supramolecular polymers. Although this fascinating phenomenon has been disclosed, the chiral supramolecular materials reported thus far are not optimized for acting as efficient photosensitizer for dye‐sensitized PECs. In this work we report on the design, synthesis, and characterization of chiral supramolecular aggregates based on C3‐symmetric triphenylamine‐based dyes that are able to both absorb visible light and control the spin state of the process. Variable temperature‐dependent spectroscopic measurements reveal the assembly process of the dyes and confirm the formation of chiral aggregates, both in solution as well as on solid supports. Photoelectrochemical measurements on TiO2‐based anodes validate the advantage of using chiral supramolecular aggregates as photosensitizer displaying higher photocurrent compared to achiral analogues. Moreover, fluorimetric tests for the quantification of the hydrogen peroxide produced, confirm the possibility of controlling the spin of the reaction exerting spin‐selection with chiral supramolecular polymers. These results represent a further step towards the next‐generation of organic‐based water‐splitting solar cells.

show abstract

Role of the Electron Spin Polarization in Water Splitting

Cited by 188 publications

References 45 publications

Chiro‐Spintronics: Spin‐Dependent Electrochemistry and Water Splitting Using Chiral Molecular Films

Chiro‐Spintronics: Spin‐Dependent Electrochemistry and Water Splitting Using Chiral Molecular Films

Chirality – Beyond the Structural Effects

Chiral Aggregates of Triphenylamine‐Based Dyes for Depleting the Production of Hydrogen Peroxide in the Photochemical Water‐Splitting Process

Contact Info

Product

Resources

About