Highly selective luminescent sensing of Cu2+ in aqueous solution based on a Eu(III)-centered periodic mesoporous organosilicas hybrid
Highly selective luminescent sensing of Cu2+ in aqueous solution based on a Eu(III)-centered periodic mesoporous organosilicas hybrid
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基于Eu(III)中心周期性介孔有机硅杂化物的水溶液中Cu2的高选择性发光传感
DOI：
10.1016/j.matdes.2019.107712
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发表时间：
2019-06-15
影响因子：
8.4
通讯作者：
Yu, Xudong
中科院分区：
文献类型：
--
作者：
Li, Heng;Li, Yajuan;Yu, Xudong
以Pluronic P123表面活性剂为模板剂，通过与1，2-二(三乙氧基硅基)乙烷共缩合反应，成功地合成了4‘-(4-羧基亚甲氧基苯基)-2，2’：6‘，2“-联吡啶功能化的周期性介孔有机二氧化硅(L-甲氧基苯基)。这种联吡啶部分与Eu离子形成有趣的络合物，并增强Eu3+离子的发光。因此，通过配体交换反应将Eu~(3+)配合物Eu(Nta)(3)(H_2O)(2)与L官能化的PMO材料(L-COOH-PMO)连接起来，制备了一种新型的发光杂化材料。光致发光性能研究表明，制备的介孔杂化Eu(NTa)(3)L-羧酸-PMO在固态和水溶液中具有红光发射、长寿命和高的绝对量子效率phi。更有趣的是，在测试离子中，它对水介质中的Cu2+离子表现出极高的灵敏度和选择性。文中还对其传感机制进行了讨论。(C)2019年提交人。爱思唯尔有限公司出版。
Using Pluronic P123 surfactant as template, a periodic mesoporous organosilica (PMO) functionalized with 4'-(4-carboxy-methyleneoxy phenyl)-2,2': 6', 2"-terpyridine (L-COOH) was successfully prepared via co-condensation using 1,2-bis(triethoxysilyl) ethane (BTESE) and the modified L-COOH (L-COOH-NH2). This terpyridine moiety forms interesting chelates to europium ions and enhances the luminescence of Eu3+ ions. Thus, a novel luminescent hybrid material was developed via linking Eu3+ complex Eu(NTA)(3)(H2O)(2) to L-COOH-functionalized PMO material (L-COOH-PMO) using ligand exchange reactions. Investigation of photoluminescent properties shows that the prepared mesoporous hybrid Eu(NTA)(3)L-COOH-PMO exhibited red emission, long lifetime and high absolute quantum efficiency phi in solid-state and aqueous solution. More interestingly, it demonstrates greatly sensitive and selective detection of Cu2+ ions in aqueousmedium among test ions. The sensing mechanism was also discussed in this report. (c) 2019 The Authors. Published by Elsevier Ltd.