Construction of four low-dimensional NIR-luminescence-tunable Yb(III) complexes

Zhi-Peng Zheng; Xiu-Xia Zhang; Teng Li; Jian Yang; Lei-Ming Wei; Li-Guo Zhang; Xiao-Ming Lin; Yue-Peng Cai

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Construction of four low-dimensional NIR-luminescence-tunable Yb(III) complexes

机译：四种低维NIR发光可调Yb（III）配合物的构建

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Four low-dimensional ytterbium(III)-organic compounds through hydrothermal reactions of quinoline- 2,3-dicarboxylic acid (2,3-H_2qldc) and oxalic acid (H_2ox) with Yb_2O_3, namely, [Yb(2,3-qldc)(ox)_(1/2)- (H_2O)_3·(H_2O)_4]_n (1), [Yb(2,3-qldc)(ox)_(1/2)(H_2O)_2·(H_2O)_2]_n (2), [Yb(2,3-Hqldc)(ox)(H_2O)_2·(H_2O)]_n (3) and [Yb(2,3-Hqldc)(ox)(H_2O)·(H_2O)_2]_n (4), were first synthesized and characterized by elemental analysis (EA), infrared spectroscopy (IR), thermogravimetric analysis (TG), and single-crystal X-ray diffraction. When the reactant ratio of 2,3-H_2qldc: H_2ox: Yb_2O_3 is 2: 1: 1, 1-D chain-like complex 1 with three coordinated water molecules around the Yb(III) ion was obtained in mixed solvents of H_2O and CH_3OH (v: v = 10: 1) at 70 ℃, and with the increase of temperature to 100 ℃, the same reactants gave 2-D 6~3 topological layerlike complex 2 with two coordinated water molecules in the coordination sphere of the Yb(III) ion. However, when the reactant ratio was changed to 1: 1: 1, two 2-D 6~3 topological layer-like complexes 3 (70 ℃) and 4 (100 ℃) were obtained at different temperatures, in which the coordination water molecules in 3 and 4 are two and one, respectively. Obviously, these results reveal that the reaction temperature and reactant ratios play critical roles in the structural direction of these low-dimensional compounds. Interestingly, with the gradual loss of coordination water molecules to the Yb(III) ion, the near infrared (NIR) emission of four Yb(III)-based compounds 1–4 can be gradually strengthened with increasing order of 1 < 3 < 2 < 4, indicating that these ytterbium(III) complexes have tunable near infrared luminescence.

机译：通过喹啉2,3-二羧酸（2,3-H_2qldc）和草酸（H_2ox）与Yb_2O_3的水热反应生成四种低维（III）有机化合物，即[Yb（2,3-qldc）（ox）_（1/2）-（H_2O）_3·（H_2O）_4] _n（1），[Yb（2,3-qldc）（ox）_（1/2）（H_2O）_2·（H_2O ）_2] _n（2），[Yb（2,3-Hqldc）（ox）（H_2O）_2·（H_2O）] _ n（3）和[Yb（2,3-Hqldc）（ox）（H_2O）·首先合成（H_2O）_2] _n（4）并通过元素分析（EA），红外光谱（IR），热重分析（TG）和单晶X射线衍射进行表征。当2,3-H_2qldc：H_2ox：Yb_2O_3的反应物比例为2：1：1时，在H_2O和CH_3OH的混合溶剂中获得了在Yb（III）离子周围具有三个配位水分子的1-D链状络合物1 （v：v = 10：1）在70℃时，随着温度升高至100℃，相同的反应物在Yb（）的配位球中生成带有两个配位水分子的2-D 6〜3拓扑层状配合物2。 III）离子。然而，当反应物比例改为1：1：1时，在不同温度下得到两个2-D 6〜3拓扑层状配合物3（70℃）和4（100℃），其中配位水分子3和4中的分别是2和1。显然，这些结果表明，反应温度和反应物比例在这些低维化合物的结构方向上起着关键作用。有趣的是，随着配位水分子逐渐流失到Yb（III）离子，四种基于Yb（III）的化合物1-4的近红外（NIR）发射可以按1 <3 <2的增加顺序逐渐增强<4，表明这些（（III）配合物具有可调的近红外发光。

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《Dalton transactions: An international journal of inorganic chemistry》 |2014年第37期|共7页
作者
Zhi-Peng Zheng; Xiu-Xia Zhang; Teng Li; Jian Yang; Lei-Ming Wei; Li-Guo Zhang; Xiao-Ming Lin; Yue-Peng Cai;
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Construction; low-dimensional; complexes;

机译：结构;低维;复杂;

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1. Construction of four low-dimensional NIR-luminescence-tunable Yb(III) complexes [J] . Zhi-Peng Zheng, Xiu-Xia Zhang, Teng Li, Dalton transactions: An international journal of inorganic chemistry . 2014,第37期

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Construction of four low-dimensional NIR-luminescence-tunable Yb(III) complexes

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