Muhammed Madathumpady Abubaker Habeeb, Cruz Laila Khalil, Emwas Abdul-Hamid, El-Zohry Ahmed M, Moosa Basem, Mohammed Omar F, Khashab Niveen M
Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
Core Labs, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
Angew Chem Int Ed Engl. 2019 Oct 28;58(44):15665-15670. doi: 10.1002/anie.201906740. Epub 2019 Sep 18.
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 (LA-P5) (TPP) ) 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.
在此，我们报道了一类新型的、由基于柱[5]芳烃（P5）的主体配体封端的功能性银纳米簇（AgNCs）的合成。这些纳米簇可通过直接合成或配体交换合成轻松制备，并且在室温下稳定超过4个月。柱[5]芳烃稳定的纳米簇（Ag(LA-P5)(TPP)）与中性烷基胺和阳离子季铵客体具有可逆的主客体相互作用。这导致形成球形聚集体，其光学性质发生了无与伦比的变化，包括惊人的约2000倍的发光增强。这是迄今为止报道的此类原子精确纳米簇的最高发光增强率。我们的合成方案为制备新一代由大环配体保护的金属纳米簇铺平了道路，这些纳米簇对特定客体具有分子识别和选择性。
