Dalton Transactions

doi: 10.1039/D0DT90116Dpmid: 32572412

doi: 10.1039/d0dt90116dpmid: 32572412

doi: 10.1039/D0DT90117Bpmid: 32572408

doi: 10.1039/d0dt90117bpmid: 32572408

doi: 10.1039/D0DT90118Kpmid: 32572411

doi: 10.1039/d0dt90118kpmid: 32572411

Yi, Jun; Nakatani, Naoki; Nomura, Kotohiro

doi: 10.1039/d0dt01139hpmid: 32432279

Mechanistic studies in homogeneous catalysis through the solution transition metal K Edge XANES (X-ray absorption near-edge structure) and EXAFS (Extended X-ray absorption fine structure) analysis for vanadium and titanium complex catalysts for ethylene polymerisation/dimerization, and syndiospecific styrene polymerisation, including interpretation of the XANES spectra, have been introduced. The core excitation spectra of the complexes based on the time-dependent density functional theory (TD-DFT) can be used to interpret the Ti and V K-edge features and to extract information on the electronic structure from the XANES spectra. Theoretical calculations and experimental XAS analysis should have great potential for analysing the active species.

Sasamori, Takahiro

doi: 10.1039/d0dt01426epmid: 32427270

Several examples of stable low-coordinated species of heavier group 14 elements (Si, Ge, Sb, Pb) such as divalent species and multiple-bond compounds have been reported. With the goal in mind to create unprecedented low-coordinated species of heavier group 14 elements that exhibit considerably increased redox stability, ferrocenyl (Fc)-substituted low-coordinated species of heavier group 14 elements were designed. In this short account article, recent progress on the synthesis of Fc-based low-coordinated species of heavier group 14 elements is summarized.

Yin, Shaokun; Li, Chao; Wang, Shicun; Ren, Xiangkui; Zeng, Liang; Zhang, Lei

doi: 10.1039/d0dt01683gpmid: 32515458

MoS2 with a two-dimensional morphology has been recognized as a promising electrode material due to its good electrochemical activity. An integrated electrode has been achieved by growing MoS2 on nickel foam with a nanosheet morphology and honeycomb structure. This binder-free MoS2/Ni3S2/NF electrode has demonstrated a specific capacity of 300.26 mA h g−1 (0.61 mA h cm−2) at 1 A g−1 with 73.8% retention at 20 A g−1, while maintaining good electrochemical stability during 4000 charging–discharging cycles.

Xiao, Xin; Wang, Yihui; Bo, Qiu; Xu, Xingyou; Zhang, Dongen

doi: 10.1039/d0dt00299bpmid: 32525155

Nonmetal doping is a convenient method to adjust the visible light photocatalytic activity of graphitic carbon nitride (g-C3N4). Herein, highly active sulfur-doped porous g-C3N4 (C3N4–S) was successfully prepared by one-step calcination using thiourea and melamine as the precursors. C3N4–S exhibited excellent photocatalytic performance for the degradation of Rhodamine B (RhB) under visible light irradiation. C3N4–S not only promoted the separation of photogenerated electron–hole pairs, but also enhanced electron transfer, resulting in a great improvement in the photocatalytic efficiency. Based on capture experiments and DMPO spin-trapping ESR spectra, the superoxide radical (˙O2−) was proved to be the predominant active species and the possible photocatalytic mechanism of C3N4–S was proposed. The photocatalytic mechanism of RhB degradation over C3N4–S was further explored using high-resolution mass spectra (HRMS).