Abstract

In this work, we provide a facile and valid one-pot synthesis method to create unreported hierarchical cluster of lanthanide cluster plus gold cluster (Ln-Au cluster), by introducing the ligands with bifunctional groups of carboxyl and sulfhydryl. The identities of Ln-Au clusters are fully characterized to be Ln₇Au₂₀ (MPCA)₂₁ (Ln = Ce, 1; Eu, 2; Tb, 3; MPCA = 2-mercaptonicotinic acid) and Ln₅Au₁₈(TSA)₁₅ (Ln = Ce, 4; Eu, 5; Tb, 6; TSA = thiosalicylic acid). Results reveal the six Ln-Au clusters are hierarchical structure that Ln cluster and Au cluster are connected by bifunctional ligands of MPCA or TSA. The excellent “antenna effect” of TSA results in highly luminescence quantum yield of 67% for 6. Interestingly, Ln-Au clusters 4 and 5 show very high MB adsorption capacity of 189 and 158 mg/g in short adsorption equilibrium time of 30 and 5 min, respectively.

摘要

在这项工作中，我们提供了一种简便有效的一锅合成方法，通过引入带有羧基和巯基双官能团的配体来创建未报告的镧系元素簇与金簇（Ln-Au簇）的分层簇。Ln-Au簇的身份被完全表征为Ln ₇ Au ₂₀（MPCA）₂₁（Ln = Ce，1 ; Eu，2 ; Tb，3 ; MPCA = 2-巯基烟酸）和Ln ₅ Au ₁₈（TSA）₁₅（Ln = Ce，4 ; Eu，5 ; Tb，6; TSA =硫代水杨酸）。结果表明，六个Ln-Au团簇是Ln团簇和Au团簇通过MPCA或TSA的双功能配体相连的分层结构。优异的TSA的结果在67％的高度发光量子产率“天线效应” 6。有趣的是，Ln-Au团簇4和5在30分钟和5分钟的短吸附平衡时间内分别显示出189和158 mg / g的极高MB吸附能力。