No abstract

On the basis of the unique chaotropic supramolecular assembly of cucurbit[5]­uril (CB5) and dodecahydro-closo-dodecaborate anion [closo-B12H12]2–, we have developed an efficient and universal platform to fabricate shape-controlled dodecaborate-based supramolecular organic frameworks (BOFs) decorated with ultrafine monodispersed trimetallic alloys. Simply by regulating the molar ratio of CB5 and [closo-B12H12]2–, a series of fascinating morphologies, such as flowerlike structures, nanorods, nanocubes, and nanosheets, were successfully constructed. These obtained BOFs were proved to be good substrate supports for in situ synthesis of trimetallic PtCoNi nanoalloys, where the final PtCoNi–BOFs materials were obtained efficiently as a precipitate from aqueous solutions, and showed excellent catalytic performance in ammonia borane hydrolysis with a high turnover frequency of 1490 molH2 molPt –1 min–1 and a low activation energy of 15.79 kJ mol–1.

No abstract

Utilizing supported Au as a NRR catalyst to achieve both high ammonia yield and ideal faradaic efficiency under ambient conditions.

To address a long-standing issue of building molecular electrical circuits heavily relying on anchoring chemistry, we propose an alternative method to immobilize anchor-free molecules in a molecular cavity between metal electrodes. In such a scheme, well-defined conductance distribution of anchor-free molecules was obtained by means of a scanning tunneling microscopy break-junction technique. Density functional theory calculations suggest that effective electronic coupling at the molecule-electrode interface can be achieved through well-defined van der Waals (vdW) interactions when the molecule is confined in a cavity with a defined geometry. This work offers a new paradigm to achieve reliable conductance measurements of molecules via vdW interaction without metal-binding groups.