- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Effects of Perpendicular Aryl Groups on Electronic Properties and Complexation of 4,4-Dihydrodithienosilole
摘要： 4,4-Dihydrodithienosilole bearing perpendicular Tip groups at the 3,5-positions (1) was synthesized. Compound 1 was characterized by NMR, IR, and mass spectroscopy and X-ray crystallography. The lowest energy absorption band in the UV/Vis spectrum is shifted bathochromically compared with the parent 4,4-dihydrodithienosilole II. The fluorescence quantum yield of 1 is much higher than that of II. The oxidative addition of 1 to Pt(PPh3)2(C2H4) gave the isolable silylplatinum hydride complex 7 in contrast to II and a related compound. These results indicate that the Tip groups affect the electronic properties and complexation.
关键词： Perpendicular aryl group,Electronic effect,Dithienosilole
更新于2025-11-14 14:48:53
-
Controllable synthesis of P-doped MoS2 nanopetals decorated N-doped hollow carbon spheres towards enhanced hydrogen evolution
摘要： In order to construct the molybdenum disulfide (MoS2) hybrid nanostructure with enhanced conductivity and more active sites towards electrocatalytic hydrogen evolution reaction (HER), hierarchical P-doped MoS2 nanopetals decorated N-doped hollow carbon spheres (N-C@P-MoS2) core-shell structures were synthesized via calcination and hydrothermal synthesis. N-C@P-MoS2 with optimized loadings exhibited favorable HER activities with low onset overpotential (117 mV), small Tafel slopes (68 mV/dec), and fine stability compared with pure MoS2 nanosheets and all undoped samples. This is largely ascribed to the synergy of MoS2 and carbon in the rational hierarchical structures, as well as the modified electronic structure with improved conductivity, increased active sites by virtue of N and P doping. Furthermore, P-doped MoS2 nanosheets were encapsulated in carbon spheres (N-C/P-MoS2 (inside)) by controlling the dropping rate of adding MoS2 precursors. As the active sites were hampered, it is found that the N-C/P-MoS2 (inside) revealed poor HER performance compared with the core-shell counterparts. The results demonstrate that the fabrication of hierarchical MoS2/carbon composites with the synergy of structural (morphology and content) and electronic (active sites and conductivity) effects induced by various nonmetal doping pave the way for enhanced electrocatalytic HER activities.
关键词： Hollow carbon sphere,structural and electronic effect,Nonmetal doping,Hydrogen evolution reaction,Molybdenum disulfide
更新于2025-09-10 09:29:36
-
A Turn-on MOF-Based Luminescent Sensor for Highly Selective Detection of Glutathione
摘要： Glutathione (GSH), as a key regulator for the redox balance of biological processes, was detected with a metal-organic framework (MOF) (UiO-67-sbdc) fluorescence sensor. The fluorescence of UiO-67-sbdc could be effectively enhanced by GSH via an electronic effect between GSH and the ligand of MOF, thus achieving the recognition of GSH. It is the first attempt to design a MOF-based fluorescent sensor to distinguish GSH from cysteine (Cys). This sensor exhibited short response time (< 120 s), suitable linear range, and high selectivity towards GSH. Further research conducted in serum also showed a quantitative and selective detection of GSH. Thus, the reported UiO-67-sbdc in this work has its application prospect in clinically judging antioxidant capacity of the body.
关键词： turn-on,bio-thiol,Metal-organic frameworks,fluorescence sensor,electronic effect
更新于2025-09-09 09:28:46