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General Synthetic Route toward Highly Dispersed Metal Clusters Enabled by Poly(ionic liquid)s

Author:
Sun, Jian-Ke, Kochovski, Zdravko, Zhang, Wei-Yi, Kirmse, Holm, Lu, Yan, Antonietti, Markus, Yuan, Jiayin
Source:
Journal of the American Chemical Society 2017 v.139 no.26 pp. 8971-8976
ISSN:
1520-5126
Subject:
alloys, binding sites, catalytic activity, cations, ionic liquids, transition elements
Abstract:
The ability to synthesize a broad spectrum of metal clusters (MCs) with their size controllable on a subnanometer scale presents an enticing prospect for exploring nanosize-dependent properties. Here we report an innovative design of a capping agent from a polytriazolium poly(ionic liquid) (PIL) in a vesicular form in solution that allows for crafting a variety of MCs including transition metals, noble metals, and their bimetallic alloy with precisely controlled sizes (∼1 nm) and record-high catalytic performance. The ultrastrong stabilization power is a result of an unusual synergy between the conventional binding sites in the heterocyclic cations in PIL and an in situ generated polycarbene structure induced simultaneously to the reduction reaction.
Agid:
6030972