纳米团簇
发光
阳离子聚合
支柱
配体(生物化学)
化学
主客化学
金属
选择性
纳米技术
光化学
组合化学
材料科学
高分子化学
超分子化学
分子
有机化学
结构工程
工程类
生物化学
催化作用
受体
光电子学
作者
Madathumpady Abubaker Habeeb Muhammed,Laila Khalil Cruz,Abdul‐Hamid Emwas,Ahmed M. El‐Zohry,Basem Moosa,Omar F. Mohammed,Niveen M. Khashab
标识
DOI:10.1002/anie.201906740
摘要
Abstract Herein, we report the synthesis of a new class of functional silver nanoclusters (AgNCs) capped with pillar[5]arene (P5)‐based host ligands. These NCs are readily prepared through direct synthesis or ligand exchange synthesis and are stable at room temperature for over 4 months. The pillar[5]arene‐stabilized NCs (Ag 29 (LA‐P5) 12 (TPP) 2 ) endorse reversible host–guest interactions with neutral alkylamines and cationic quaternary ammonium guests. This results in the formation of spherical assemblies with unparalleled changes in their optical properties including an astonishing circa 2000‐fold luminescence enhancement. This is the highest luminescence enhancement ratio reported so far for such atomically precise NCs. Our synthetic protocol paves the way for the preparation of a new generation of metal nanoclusters protected by macrocyclic ligands with molecular recognition and selectivity toward specific guests.
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