Step Cyclization to Give Part Belt Oxygen-Functionalized Pillar[6,10]arenes.

Part belt oxygen-functionalized pillar[6,10]arenes are synthesized by step cyclization. An oxygen-substituted tetramer and hexamer have been prepared to construct the O3 pillar[6]arene via a hexamer cyclization reaction and the O6 pillar[10]arene through a [4 + 1+4 + 1] cyclization reaction. X-ray crystallographic studies reveal that both macrocycles have a large cavity and indicate that the part belt oxygen-functionalized pillar[6,10]arenes have both similar cyclic structures and certain differences in configuration compared to pillararene.

Highly Reversible "On-Off-On" Fluorescence Switch Governed by pH, Utilizing Bis(Benzimidazole) Derivatives with Varied Link Groups.

In this work, a series of dibenzimidazole derivatives 1-4, act as highly reversible colorimetric and fluorescent pH chemosensor, were designed and synthesized. Excellent reversible pH response of these sensors could be found by a specific pH change through obvious fluorescent color changes. The response is not affected by common cations (including Al, Cu, Ca, Cd, Co, Cr, Mg, Na, K, Ni, Pb and Zn) and anions (including F, Cl, Br, I, ClO, HPO, HSO, HCO and CHCOO).

Assessment of interactions between elemental carbon and metals in black carbon: Hydroxyl radical generation and glutathione depletion.

Elemental carbon (EC) and metals are two important parts of atmospheric black carbon (BC). However, little information is available regarding the interaction between them and its impacts on the reactive oxygen species (ROS) formation and physiological antioxidants depletion. In this study, we chose six most frequently detected metals (Cu(Ⅱ), Fe(Ⅲ), Mn(Ⅱ), Cr(Ⅲ), Pb(Ⅱ) and Zn(Ⅱ)) in BC and examined their interactions with EC in the ROS generation and glutathione (GSH) oxidation.

The influence mechanisms of inclusive leadership on job satisfaction: Evidence from young university employees in China.

Background: Leadership style and job satisfaction are currently hot issues in the field of management psychology research, especially with regard to young employees.

Objective: This study attempted to explain the mechanism of improving employees' job satisfaction by combining the key factors of work-family balance and psychological capital.

Methods: We adopted the literature method, questionnaire survey method, and statistics method to conduct the research.

Insight into the oxidation of glutathione mediated by black carbon from three typical emission sources.

Black carbon (BC) is released into the atmosphere in large quantities from different emission sources each year and poses a serious threat to human health. These BC possessed a variety of characteristics and different mediation abilities for the reactive oxygen species (ROS) generation. In this study, we collected BC (i.

A Sensitive Fluorescent Sensor for Highly Sensitive Detection of Water in Organic Solvents Based on Substituted Imidazole.

A novel substituted imidazole derivative 1a with carboxyl and quinoline structure has been designed and synthesized. And our initial discovery is that this compound can effectively detect water in ethanol. And the metal in solution couldn't affect the absorption and fluorescence Spectra of 1a.