2020年3月10日 · The electronic structure and photochemistry of copper formate clusters, Cu I2 (HCO 2) 3− and Cu IIn (HCO 2) 2n+1−, n ≤8, are investigated in the gas phase by using UV/Vis spectroscopy in combination with quantum chemical calculations. A clear difference in the spectra of clusters with Cu I and Cu II copper ions is observed.

2005年12月30日 · UV–vis spectroscopy is an easy approach to detect the presence of this bis (μ-oxo)dicopper core since it is characterized by an intense charge transfer band at 22 700 cm −1. In this way it was found that after calcination, only the Cu exchanged zeolites ZSM-5 and MOR are capable of stabilizing this core.

2020年7月15日 · UV–Vis result shows an absorption band at 650 nm, which is the characteristic surface Plasmon band for Cu 2 O nanoparticles. The contact angle measurement suggests that the as-prepared ethanol-based Cu 2 O ink has excellent wettability on a glass substrate.

2024年11月4日 · ME-UV–vis spectra highlight the redox activity of copper species and the electronic interactions between copper and ceria, revealing major reduction of Cu 2+ to Cu + while reduction of Ce 4+ to Ce 3+ is minor under the studied reaction conditions.

2024年5月29日 · Herein, an online coupled EPR/UV–vis/near-IR detecting method is developed to simultaneously monitor both reactive radical species and copper complex intermediates during the reaction.

2024年7月6日 · In this study, a method based on ultraviolet-visible spectroscopy (UV-Vis) combined with partial least squares regression analysis (PLS) was proposed for the determination of high copper ions (>100 mg/L), which performs rapid and accurate determination of high Cu2+ concentration by preprocessing and feature extraction of UV-Vis spectral data ...

3 天之前 · This study introduces a photothermal synergistic system for the removal of ethyl acetate (EA) by synthesizing Cu-doped OMS-2 (denoted as Cu-OMS-2). Under ultraviolet-visible (UV-Vis) irradiation in a flow system, the Cu-OMS-2 catalyst exhibited significantly enhanced performance in the EA degradation process, nearly doubling the effectiveness ...

2 天之前 · A 250 W, 365 nm mercury UV and UV-visible lamp was used. The light intensity (Lux) under UV-vis irradiation was noted as 1910 × 100 (191 000) Lux. Each experiment was carried out in correspondence with the respective investigative input …

2025年3月11日 · The Cu oxidation state and microenvironment were spectroscopically assessed by IR, DRS-UV-Vis-NIR and XAS, proving the successful heterogenization of the complex. The obtained MOF was tested in parallel with its homogeneous counterpart for cyclohexene oxygenation using tert-butyl hydroperoxide as oxidant.

3 天之前 · Molecular doping of TCNQ (tetracyanoquinodimethane) in Cu-ADA thin films led to the formation of an electronic heterostructure exhibiting rectification of current and enhancement of electrical conductance in the cross-plane and in-plane configurations, respectively. ... Solid-state UV-vis spectra were recorded on a Shimadzu UV-vis-NIR ...