Magnetic Interactions in Layered Nickel Alkanethiolates

John, Neena S.; Datta, Ayan; Pati, Swapan K.; Komori, Fumio; Kavitha, G.; Narayana, Chandrabhas; Sanyal, M. K.

doi:10.1021/jp0675072

Cited by 30 publications

(37 citation statements)

References 27 publications

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“…Co‐C16SH‐based ink is synthesized following a modified method reported for Ni alkylthiolate in the literature . Briefly, cobalt triethylamine complex is mixed with hexadecylthiol in 2:1 molar ratio to form Co‐C16SH complex.…”

Section: Resultsmentioning

confidence: 99%

“…Co hexadecylthiolate (Co‐C16SH) complex was synthesized by a general two‐step method reported earlier for nickel alkylthiolates in literature . Triethylamine complex of Co was synthesized by adding 1 molar cobalt(II) nitrate hexahydrate (CAS Number 10026‐22‐9) in ethanolic solution to 2 molar triethyl amine (CAS Number 121‐44‐8) under constant stirring at 70 °C.…”

Section: Methodsmentioning

confidence: 99%

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Layer‐by‐Layer Coating of Cobalt‐Based Ink for Large‐Scale Fabrication of OER Electrocatalyst

et al. 2019

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The scalability and stability of electrocatalysts is one of the biggest challenges for their practical applicability. In this context, Co3O4 nanoparticles conformally coated on a light weight, 3D and highly conducting carbon cloth are fabricated using an easily synthesized cobalt hexadecylthiolate complex as ink. This method is especially useful for large‐scale production as the complex is synthesized in large quantities and coated on 3D substrates by a simple dip‐coating method. The optimum loading of the catalyst is achieved through a layer‐by‐layer (LbL) assembly of a cobalt hexadecylthiolate complex via repeated dip coating of the carbon cloth electrode in the solution. The Co3O4/CC undergoes electrochemical oxidation and converts to CoOOH as an active species and acts as a highly efficient electrocatalyst with optimized loading. The Co3O4‐16/CC with 16 times dip coating exhibits remarkable stability over 24 h with an overpotential of 300 mV at 10 mA cm−2 and a Tafel slope of 77.06 mV dec−1. The electrocatalytic activity of Co3O4‐16/CC prepared by LbL coating is better than conventional Co3O4 and comparable to IrO2 and RuO2 electrocatalysts with the future possibility of commercial‐scale production at lower cost.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Layer‐by‐Layer Coating of Cobalt‐Based Ink for Large‐Scale Fabrication of OER Electrocatalyst

et al. 2019

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“…The Ni‐HDT complex in toluene is deep black‐brown due to ligand‐to‐metal charge‐transfer transitions. A thiol group with a long methylene chain (hexadecanethiol) was chosen for this study to achieve high solubility in organic solvent for solution processing . Nickel alkanethiolates, Ni(SR) 2 , are known to form lamellar bilayers (Figure a, right) .…”

Section: Resultsmentioning

confidence: 99%

“…TheN i-HDT complex in toluenei s deep black-brown due to ligand-to-metal charge-transfer transitions.Athiolg roup with al ong methylenec hain (hexadecanethiol) was chosen for this study to achieve high solubility in organics olvent for solution processing. [29,30] Nickel alkanethiolates,N i(SR) 2 ,are known to form lamellar bilayers (Figure 1a,r ight). [28] TheX RD pattern of pristine Ni-HDT in Figure 1bincludes ab road peak at 2q = 4.6128 corresponding to the (001) reflectionw ith ac orresponding d spacing of 9.63 .T he partialt hermolysiso fN i-HDT at 200 8Cr esults in ab road band without sharp or crystalline peaks,w hich is indicative of the formation of small nucleates surrounded by material of amorphous nature.…”

Section: Resultsmentioning

confidence: 99%

“…Characterization of Ni‐based pseudocapacitive coating (NPC): Ni hexadecanethiolate was synthesized following a method previously reported . Briefly, an ethanolic solution of NiCl 2 ⋅6 H 2 O (1 mmol) and trimethylamine (2 mmol) was stirred while adding hexadecanethiol in ethanol (2 mmol), resulting in the formation of a brown‐black precipitate.…”

Section: Methodsmentioning

confidence: 99%

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Scalable Coating of Single‐Source Nickel Hexadecanethiolate Precursor on 3D Graphitic Petals for Asymmetric Supercapacitors

Gupta

Fisher

2016

Energy Tech

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A hybrid Ni‐based pseudocapacitive coating consisting of NiO–Ni3S4 on graphene petals is studied as an efficient electrode for supercapacitor applications. A single‐source precursor of Ni is synthesized for coating on graphene petals supported on conducting carbon cloth as the current collector. The loading of Ni hexadecanethiolate on graphene petals surface is optimized with respect to electrochemical performance in terms of specific capacitance. The hybrid electrode gives high specific capacitance (≈2360 F g−1) and stability over 5000 cycles. Importantly, this coating process of Ni‐based pseudocapacitive layer can be readily deployed in roll‐to‐roll (R2R) processes.

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Lamellar Bimetallic Thiolates: Synthesis, Characterization, and Their Utilization for the Preparation of Bimetallic Chalcogenide Nanocrystals through Mechanochemical Grinding

Bera

Pathak

Kotha

et al. 2021

Adv Materials Inter

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thiolates [6] having lamellar architectures (Scheme 1A,B) are generating greater curiosity recently. [3a,6,7] The structures of many of these metal thiolates have been characterized in detail and it has been established that they consist of a network of metal ions covalently linked to sulfur atoms of the alkyl thiolate anion. [8] Recently, we found that some of these metal thiolates can be delaminated into individual molecular sheets simply by adding a nonpolar organic solvent to them. [9] Quite interestingly while few of these metal thiolates get delaminated into individual sheets (for example, Pd-alkyl thiolate, Ni-alkyl thiolate, Pb-alkyl thiolate) [6] when a nonpolar solvent is added, [9a] many others are quite insoluble (Ag-alkyl thiolate, Cu-alkyl thiolate, Au-alkyl thiolate) in these solvents under normal circumstances. [10] In this premise, it would be pertinent to ask i) would it be possible to prepare metal thiolates consisting of two metal ions? ii) What would be the bulk structure of such bimetallic thiolates? and iii) What about their solubility/ dispersibility? Here, the second question assumes greater significance because one can envisage three different structural scenarios. The first one is the formation of a segregated/mixed stack where both metal thiolates exist as separate noninteracting individual lamellar sheets and the final material is nothing but a physical mixture of the individual thiolates (Scheme 1C). The second possibility is an alternating stacks where one individual metal thiolate sheet is above the second one forming an A-B-A-B type structure (Scheme 1D). The third and final possibility is a structure where both metal ions are intricately mixed and are present in each sheet of the lamellar structure (Scheme 1E). Regarding the solubility it would be interesting to see what would happen when a bimetallic thiolate is made of two metal ions of which one of the individual metal thiolate is known to be soluble type while the other is insoluble in a given solvent.Addressing this we report here the preparation of two bimetallic thiolates, namely, copper-indium thiolate and silver-indium thiolate. The reason to choose this combination of metal ions is as follows. It has been clearly shown that of these three metal ions, thiolates of copper and silver are insoluble [10a] in most of the solvents tested. In contrast, indium thiolate is readily Thiolates of single metal ions are known to exist as lamellar structures in the neat state and some of these metal thiolates can be delaminated into individual molecular sheets simply by adding a nonpolar organic solvent. It is established here that even bimetallic thiolates such as copper-indium thiolate and silver-indium thiolate exist as lamellar sheets. Each of these sheets consists of both metal ions arranged in a random fashion. It is also demonstrated that these bimetallic thiolates can be employed as single source precursors to prepare phase pure bimetallic chalcogenide nanocrystals (NCs) through mechanochemical routes by grinding them with...

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Magnetic Interactions in Layered Nickel Alkanethiolates

Cited by 30 publications

References 27 publications

Layer‐by‐Layer Coating of Cobalt‐Based Ink for Large‐Scale Fabrication of OER Electrocatalyst

Layer‐by‐Layer Coating of Cobalt‐Based Ink for Large‐Scale Fabrication of OER Electrocatalyst

Scalable Coating of Single‐Source Nickel Hexadecanethiolate Precursor on 3D Graphitic Petals for Asymmetric Supercapacitors

Lamellar Bimetallic Thiolates: Synthesis, Characterization, and Their Utilization for the Preparation of Bimetallic Chalcogenide Nanocrystals through Mechanochemical Grinding

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