X-ray photoelectron spectroscopy of nickel dithiolene complex Langmuir–Blodgett films

Yang, De‐Quan; Sun, Yun; Guo, Yun; Da, Daoan

doi:10.1016/s0169-4332(99)00145-2

Cited by 8 publications

(5 citation statements)

References 21 publications

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“…2e. This oxidised sulphur peak could be due to the absorbed oxygen in Co(dtc-SB) NWs (Yang, Sun, Guo, & Da, 1999). Peak at 531.1eV in O 1s indicates the presence of Co-O-H in the structure (Atzei et al, 2000;Baba et al 2012).…”

Section: /2 Xy(imentioning

confidence: 96%

Synthesis, Electronic and Optical Properties of Cobalt(II) Dithiocarbamate Fluorescent Nanowires for Optoelectronic Devices

Ujjain¹,

Ahuja²,

Sharma³

et al. 2015

IJC

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Schiff base containing symmetric bis-dithiocarbamate ligand Na 2 [dtc-SB-dtc] (SB = Bi-Schiff base Phenylene diamine) is synthesized and metallated with Co(II)Cl 2 .6H 2 O to form [Co(dtc-SB-dtc).2H 2 O] n Co(dtc-SB) infinite coordination polymer (ICP) nanowires [Co(dtc-SB) NWs]. Pair of Satellites in X-ray photoelectron spectroscopy (XPS) spectrum of Co 2p confirm the formation of hexa-coordinated Co(II). Presence of hyperfine pattern in low temperature EPR spectrum is due to the splitting of octahedral ground state 4 T 1 for Co(II). Introduction of a rigid, non-planar, four membered dtc Cobalt chelating ring in coordination polymer assisted in reduction of photoinduced electron transfer (PET) process to yield high fluorescence. Prepared Co(dtc-SB) NWs are highly resistive however after suitable doping, exhibit p and n type conductivity. Temperature dependent conductivity results of different doping concentrations in NWs reflect activated type conduction with two different activation energies. UV-Visible absorption spectra show decrement in optical gap whereas emission spectra demonstrate quenching after p and n doping. Efficient quenching of emission indicates energy transfer between dopant ions and NWs.

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Section: /2 Xy(imentioning

confidence: 96%

Synthesis, Electronic and Optical Properties of Cobalt(II) Dithiocarbamate Fluorescent Nanowires for Optoelectronic Devices

Ujjain¹,

Ahuja²,

Sharma³

et al. 2015

IJC

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“…The metal–oxygen bond signal located at 529.4 eV was attributed to the Ni–O signal in the O 1s spectrum (Figure d), indicating a small amount of Ni–O. − The S 2p is composed of two main peaks at 162.4 and 163.3 eV, corresponding to S 2p 3/2 and S 2p 1/2 , respectively, suggesting the −2 oxidation state in Ni 3 S 2 . Moreover, the weak peak at 168.6 eV hints at the formation of S–O bonds by oxidation on the surface of S (Figure e) …”

Section: Resultsmentioning

confidence: 98%

“…44 Moreover, the weak peak at 168.6 eV hints at the formation of S−O bonds by oxidation on the surface of S (Figure 4e). 47 N 2 adsorption/desorption curves of Ni−S−C T catalyst material at 77 K were shown in Figure S7. All of the pyrolyzed products showed H4-type hysteresis loops, indicating the inclusion of a mesoporous structure.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

S-Doped Ni^II-Triazolate Derived Ni–S–C Catalyst for Electrochemical CO₂ Reduction to CO

Zhang

Chen

Zheng

et al. 2022

ACS Appl. Energy Mater.

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Metal heteroatom doped carbon materials display remarkable catalytic performance in the electrochemical CO 2 reduction (ECR) because the doped heteroatoms can significantly change the local density of state and electronic structure of carbon, which induces charge polarization or structural defects. Herein, we synthesized S-doped Ni II -triazolate precursors with high purity and crystallinity through a simple one-step hydrothermal method. The high-temperature pyrolysis process produced a series of Ni−S−C T (T = 800, 900, 1000 °C) materials with Ni 3 S 2 as the main component. It resulted in significant carbon structure defects in the catalyst, which increased the specific surface area and pore volume, providing a basis for improving the ECR activity. Through the structural characterizations of powder X-ray diffraction (PXRD), Raman, X-ray photoelectron (XPS), Brunauer−Emmett−Teller (BET), transmission electron microscopy (TEM), and electrochemical characterizations of linear sweep voltammetry (LSV), chronoamperometry (i−t curve), electrochemical impedance spectroscopy (EIS), and electrochemical active surface area (ECSA), as well as gaseous product analysis, we can build the structural-performance relationship. Ni−S−C T catalysts all reached the highest CO Faraday efficiency at −1.5 V vs Ag/AgCl potential, among which Ni−S−C 1000 exhibited the best catalytic activity (FE CO of 66.6% and j CO of 1.28 mA/ cm 2 ). It also displayed excellent stability and recyclability, which could realize the efficient reuse of the catalyst. In addition, the density functional theory (DFT) calculation was carried out on Ni 3 S 2 to illustrate the ECR activity origination. It is the first report on Ni 3 S 2 -based catalysts in the application of ECR.

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“…An exhaustive review of surface-sensitive methods that have been used to characterize surfactants at the solution−vapor interface can be found in refs 8,16. One of the most popular surface-sensitive characterization methods, X-ray photoelectron spectroscopy (XPS), has been widely used to study surfactant layers after they have been transferred onto solid substrates using the Langmuir− Blodgett and other preparation methods 17,18 but to the best of our knowledge has not yet been applied to investigations of surfactants at the solution−vapor interface. XPS provides information on the elemental composition and the chemical nature of the species at the interface (e.g., functional groups) and is thus ideally suited for investigations of heterogeneous chemical reactions involving the gas phase, surfactants at the interface, as well as solvent and solute molecules in the solution (see Figure 1).…”

Section: ■ Introductionmentioning

confidence: 99%

“…An exhaustive review of surface-sensitive methods that have been used to characterize surfactants at the solution–vapor interface can be found in refs , . One of the most popular surface-sensitive characterization methods, X-ray photoelectron spectroscopy (XPS), has been widely used to study surfactant layers after they have been transferred onto solid substrates using the Langmuir–Blodgett and other preparation methods , but to the best of our knowledge has not yet been applied to investigations of surfactants at the solution–vapor interface.…”

Section: Introductionmentioning

confidence: 99%

Compression of a Stearic Acid Surfactant Layer on Water Investigated by Ambient Pressure X-ray Photoelectron Spectroscopy

Hoek,

Gerber,

Richter

et al. 2024

J. Phys. Chem. B

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We present a combined Langmuir−Pockels trough and ambient pressure X-ray photoelectron spectroscopy (APXPS) study of the compression of stearic acid surfactant layers on neat water. Changes in the packing density of the molecules are directly determined from C 1s and O 1s APXPS data. The experimental data are fit with a 2D model for the stearic acid coverage. Based on the results of these proof-of-principle experiments, we discuss the remaining challenges that need to be overcome for future investigations of the role of surfactants in heterogeneous chemical reactions at liquid−vapor interfaces in combined Langmuir− Pockels trough and APXPS measurements.

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X-ray photoelectron spectroscopy of nickel dithiolene complex Langmuir–Blodgett films

Cited by 8 publications

References 21 publications

Synthesis, Electronic and Optical Properties of Cobalt(II) Dithiocarbamate Fluorescent Nanowires for Optoelectronic Devices

Synthesis, Electronic and Optical Properties of Cobalt(II) Dithiocarbamate Fluorescent Nanowires for Optoelectronic Devices

S-Doped Ni^II-Triazolate Derived Ni–S–C Catalyst for Electrochemical CO₂ Reduction to CO

Compression of a Stearic Acid Surfactant Layer on Water Investigated by Ambient Pressure X-ray Photoelectron Spectroscopy

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X-ray photoelectron spectroscopy of nickel dithiolene complex Langmuir–Blodgett films

Cited by 8 publications

References 21 publications

Synthesis, Electronic and Optical Properties of Cobalt(II) Dithiocarbamate Fluorescent Nanowires for Optoelectronic Devices

Synthesis, Electronic and Optical Properties of Cobalt(II) Dithiocarbamate Fluorescent Nanowires for Optoelectronic Devices

S-Doped NiII-Triazolate Derived Ni–S–C Catalyst for Electrochemical CO2 Reduction to CO

Compression of a Stearic Acid Surfactant Layer on Water Investigated by Ambient Pressure X-ray Photoelectron Spectroscopy

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S-Doped Ni^II-Triazolate Derived Ni–S–C Catalyst for Electrochemical CO₂ Reduction to CO