Structures and photoluminescence properties of organic-inorganic hybrid materials based on layered rare-earth hydroxides
Structures and photoluminescence properties of organic-inorganic hybrid materials based on layered rare-earth hydroxides
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基于层状稀土氢氧化物的有机-无机杂化材料的结构和光致发光性能
DOI：
10.1016/j.jlumin.2017.08.059
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发表时间：
2017-12
影响因子：
3.6
通讯作者：
Sun Genban
中科院分区：
文献类型：
--
作者：
Gu Qingyang;Yuan Mengwei;Ma Shulan;Sun Genban
通过离子交换反应将两种香豆素衍生物7-羟基香豆素和7-羟基-4-甲基香豆素插层到层状氢氧化铕中。这两种有机化合物虽然基本结构与苯并吡喃酮相同，但取代基不同，表现出了不同的插层结构。7-羟基香豆素分子可以沉积在层的外表面，7-羟基-4-甲基香豆素分子对应于垂直单层排列。此外，表面活性剂1-辛烷磺酸钠与香豆素阴离子共插层可以增大层状氢氧化铕的层间距，两种香豆素阴离子均垂直分布在层间。插层后有机物的热稳定性提高。香豆素阴离子与带正电荷的层的组合产生的杂化材料表现出多功能的发光性能。在固体状态下，7-羟基香豆素复合物的有机物和Eu 3+的发光被共猝灭，而表面活性剂共插层的7-羟基-4-甲基香豆素复合物显示出较强的紫光发射。在甲酰胺中，所有的复合物显示蓝色发光。Eu 3+与有机物之间的能量传递和微环境的改变是其发光特性多样性的主要原因。该工作有利于提高香豆素类染料的稳定性和荧光性能，为制备结构和发光性能可控的有机-无机杂化材料提供了有益的途径。
Two kinds of coumarin derivatives, 7-hydroxy coumarin and 7-hydroxy-4-methyl coumarin, were intercalated into the layered europium hydroxide by ion exchange reaction. The two organic compounds, despite with the same basic structure of benzopyrone but only varied substituent groups, demonstrated much different intercalation structures. The 7-hydroxy coumarin molecules may deposite on the external surface of the layers and 7-hydroxy-4-methyl coumarin molecules corresponded to a vertical mono-layered arrangement. In addition, co-intercalation of surfactant 1-octane sulfonic acid sodium with coumarin anions into layered europium hydroxide can enlarge the interlayer distance, both of the coumarin anions located vertically in the interlayer. The thermal stability of organics was enhanced after intercalation. The combination of the coumarin anions with the positively-charged layers generated hybrid materials exhibiting versatile luminescence properties. In solid state, the luminescence of the organics and Eu3+were co-quenched for 7-hydroxy coumarin composites, but surfactant co-intercalated 7-hydroxy-4-methyl coumarin composite showed strong violet emission. In formamide, all of the composites displayed blue emission. The energy transfer between Eu3+and organics and the change of microenvironment were proposed to account for the versatile luminescence properties. This work benefits the improvement of stability and fluorescence property of coumarin dyes and offers a beneficial approach to fabricate organic-inorganic hybrid materials with controllable structures and luminescence properties.
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影响因子：
4.3
作者：
Geng, Fengxia;Xin, Hao;Sasaki, Takayoshi
通讯作者：
Sasaki, Takayoshi
敏化剂阴离子插入的铕掺杂层状双氢氧化物的增强发光
影响因子：
4.9
作者：
Gao, Xiaorui;Hu, Meng;Faulkner, Stephen
通讯作者：
Faulkner, Stephen
影响因子：
2.8
作者：
CONSTANTINO, VRL;PINNAVAIA, TJ
通讯作者：
PINNAVAIA, TJ
影响因子：
8.6
作者：
Xiaojing Yang;Y. Makita;Zonghuai Liu;K. Sakane;K. Ooi
通讯作者：
Xiaojing Yang;Y. Makita;Zonghuai Liu;K. Sakane;K. Ooi
影响因子：
5.4
作者：
Qingyang Gu;Guohua Pan;M. Teng;Gailing Huang;Genban Sun;Shulan Ma;Xiaojing Yang
通讯作者：
Qingyang Gu;Guohua Pan;M. Teng;Gailing Huang;Genban Sun;Shulan Ma;Xiaojing Yang