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To investigate the influence of spatial extended direction and flexibility of secondary ligand on the resulting structure, eight new ferrocene-containing complexes with various dimensionalities have been synthesized by the reactions of Cd II salts and 1,1 0 -bis(3-carboxy-1-oxopropyl)ferrocene (H 2 bfcs) with series of rationally selected N-heterocyclic spacers. When the small organic molecule 4-aminopyridine (apy) was employed as a secondary ligand, a one-dimensional (1D) linear complex {[Cd(bfcs)(apy) 2 ] 3 H 2 O} n (1) was furnished, while the use of bis(azole) bridging ligands resulted in the formation of a 1D ribbon complex {[Cd(bfcs)(bbbm,4-bis(imidazole-1 -ylmethyl)benzene). In addition, the tripodal bridging secondary ligand led to an unusual three-dimensional (3D) layer pillar complex {[Cd 2 (bfcs)(titb) 2 Cl 2 ] 3 2CH 3 OH 3 4H 2 O} n (6) (titb =1,3,5-tris(imidazol-1-ylmethyl)-2,4,6-trimethylbenzene). Employment of a flexible multidentate molecule tris(2-benzimidazolylmethyl)amine (ntb) as the secondary ligand gave birth to a mononuclear complex [Cd(bfcs)(ntb)] 3 DMF 3 5H 2 O (7) and a binuclear complex [Cd 2 -(bfcs)(ntb) 2 ] 3 bfcs 3 5H 2 O (8), in which ntb adopted the chelating coordination mode. It can be observed from the coordination architectures of 1-8 that secondary ligands had great effects on the spatial connective fashions of Cd II centers, resulting in the formation of various dimensional complexes.

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A large ground-based optical/infrared telescope is being planned for a world-class astronomical site in China. The cloud-free night percentage is the primary meteorological element for evaluation of the sites. The data from satellites GMS, NOAA, and MODIS were used in this research, covering the period from 1996 to 2015. Our data analysis benefits from overlapping results from different independent teams as well as a uniform analysis of selected sites using GMS+NOAA data. Although significant ground-based monitoring is needed to validate these findings, we identify three different geographical regions with a high percentage of cloud-free conditions (∼83% on average) slightly lower than the Mauna Kea and Armazones sites (∼85% on average) chosen for the large international projects TMT and ELT respectively.

Aim The aim of this study is to investigate the compassion satisfaction and compassion fatigue among Chinese frontline nurses during the COVID‐19 pandemic in Wuhan, China and to explore the related factors. Background Frontline nurses undertake a huge nursing workload with a risk of infection, causing great pressure on them and making them face a risk of compassion fatigue during the pandemic. Methods A cross‐sectional online survey was conducted from 9 March to 15 March 2020. A total of 1582 nurses caring for critical patients with COVID‐19 participated. Compassion satisfaction and compassion fatigue (comprising burnout and secondary traumatic stress) were assessed with the Professional Quality of Life Scale, and resilience was measured with the Chinese 10‐item Connor‐Davidson Resilience Scale. Results Moderate levels of compassion satisfaction (36.99 ± 6.71), burnout (24.14 ± 5.33) and secondary traumatic stress (24.53 ± 5.24) were experienced by frontline nurses. Resilience and perceived work pressure were the main predictors. Conclusions Frontline nurses demonstrated a moderate level of compassion satisfaction and compassion fatigue. Implications for nursing management The compassion fatigue of frontline nurses should be considered. Strategies aiming to reduce stress and enhance resilience, such as training about psychological adjustment, developing professional skills and creating a supportive workplace environment, are several options. The trial is not registered. This study is a cross‐sectional study, and according to China's clinical trial registration standards, such studies are not required to be registered. So the trial is not registered. However, oral consent was obtained from the ethics committee of the hospital before this study was conducted.

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