Anion exchange dynamics in the capture of perchlorate by a cationic Ag-based MOF

The perchlorate capture process by a cationic Ag-based MOF was carefully studied using a combination of powder X-ray diffraction (PXRD), multinuclear 13C, 15N and 109Ag solid state NMR and SEM.</p

Anion exchange dynamics in the capture of perchlorate by a cationic Ag-based MOF

We report a detailed study of the host-guest interaction for a cationic metal-organic framework that can reversibly capture perchlorate. The structural transformation and flexibility of silver 4,4'-bipyridine nitrate (SBN) upon formation of silver 4,4'-bipyridine perchlorate (SBP) was evaluated by monitoring the anion exchange dynamics using a combination of powder X-ray diffraction (PXRD) with multinuclear 13C, 15N and 109Ag solid-state NMR spectra at different time intervals of the anion exchange. The structural transformation from SBN to SBP is complete within 70 minutes and was determined to take place by a solvent-mediated process. This pathway is confirmed by the morphological changes of the two crystalline materials observed by SEM. This key understanding may lead to application of this material towards perchlorate capture

Jia Zhangke’s Mountains May Depart (2015) and the China Dream or, How Chinese art cinema learned to stop worrying and love Chinese soft power

Taking Jia Zhangke’s Mountains May Depart as the case in focus, this chapter examines a segment of Chinese screen culture which has managed to circulate in domestic theatres without conforming to the normative state narrative epitomized by Xi Jinping’s catchphrase China Dream. A close reading of Jia Zhangke’s works and references to Diao Yinan’s Black Coal, Thin Ice and Ann Hui’s The Golden Era, aims to shed some light on how cinematic structures such as multiple narratives, juxtaposition of different time frames, and the adoption of diverse points of view contribute a multifaceted articulation of the rhetoric of the China Dream. Furthermore, by discussing these films against the background of the current Chinese film industry, this chapter points out how the officially promoted soft power gives way to challenging works, which often undermine China’s official narrative while endorsing China’s success. These works also testify to the increasing complexity of Chinese filmmaking both in relation to the domestic and the international film scene