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Eu(III)-Fe(II) luminous nano-tube and its preparation method and use

A nanotube, eu2o3 technology, applied in the field of biomolecular recognition, can solve problems such as difficulty in selecting ligands, difficulty in observing pore structure, and inability to mask element personality.

Inactive Publication Date: 2010-01-13
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, there are few reports about rare earth-transition mixed metal coordination polymers in the literature, and the three-dimensional structure is particularly rare [P.Cheng et al., Angew.Chem.Int.Ed., 934, 42, 2003 ; P. Cheng et al., J. Am. Chem. Soc., 126, 3012, 2004]
The reason why there are few reports on the structures of rare earth-transition mixed metal coordination polymers is that the following challenges are faced in the synthesis of such compounds: a) The high coordination number of rare earth ions makes it difficult to predict and control the products
In addition, it is also easy to make the formed lattice interpenetrate with each other, so it is difficult to observe the effective pore structure in the product; b) the competition reaction between rare earth and transition metal ions and the same ligand often leads to the product containing only one kind of metal instead of The designed mixed metal; c) It is difficult to choose a ligand with a good match in rigidity and coordination ability, because the rigidity and coordination ability of the ligand are also crucial to the topology of the polymer
[0003] On the other hand, the 4f orbital of rare earth ions belongs to the inner orbital, affected by the shielding effect, the impact of this change on the chemical properties of rare earth elements is very small, resulting in the similarity of the chemical properties of rare earth elements, but this The similarity in chemical properties cannot conceal the spectroscopic and applied individuality of these elements

Method used

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  • Eu(III)-Fe(II) luminous nano-tube and its preparation method and use
  • Eu(III)-Fe(II) luminous nano-tube and its preparation method and use
  • Eu(III)-Fe(II) luminous nano-tube and its preparation method and use

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preparation example Construction

[0024] The preparation method of the present invention comprises the following steps:

[0025] 1) Eu 2 o 3 , FeSO 4 ·7H 2 O and PDA are mixed in a molar ratio of 1:3~4:5.5~6, put into the polytetrafluoroethylene liner of the hydrothermal reaction kettle, and first add 4-6mL CH 3 CN, followed by the rapid addition of 7-9 mL H 2 O, without stirring, in case Fe 2+ It is oxidized and sealed tightly with a stainless steel sleeve.

[0026] 2) Rapidly raise the temperature to a high temperature of 145-155° C., and keep the temperature constant for 70-72 hours.

[0027] 3) Cool down to room temperature at a rate of 0.5-1° C. / hour, filter, and wash twice with deionized water to obtain dark red polyhedral prism crystals suitable for single crystal diffraction.

Embodiment 1

[0028] Embodiment 1 [Eu(PDA) 3 Fe 1.5 (H 2 O) 3 ]·1.5H 2 Synthesis of O:

[0029] 0.2mmol Eu 2 o 3 (0.070g), 0.6mmol FeSO 4 ·7H 2 O (0.167g), 1.2mmol PDA (0.200g) mixture, put into the polytetrafluoroethylene liner of 20mL hydrothermal reaction kettle, add 4mLCH first 3 CN, followed by the rapid addition of 8mL H 2 O, without stirring, in case Fe 2+ After being oxidized and sealed tightly with a stainless steel sleeve, the temperature was quickly raised to a high temperature of 150°C, and after a constant temperature of 72 hours, the temperature was programmed to cool down to room temperature. The obtained product was washed twice with 5mL water, and finally a deep red polyhedral prism suitable for single crystal diffraction was selected. shaped crystals. The calculated yield based on metal Eu was 65%.

Embodiment 2

[0030] Embodiment 2 [Eu(PDA) 3 Fe 1.5 (H 2 O) 3 ]·1.5H 2 Characterization of O:

[0031] (1) [Eu(PDA) 3 Fe 1.5 (H 2 O) 3 ]·1.5H 2 Structure determination of O

[0032] The crystal structure was determined using BRUKER SMART 1000 X-ray diffractometer, using Mokα rays (λ=0.71073 ) is the incident radiation, the diffraction points are collected by ω-φ scanning, and the unit cell parameters are obtained by least square method correction, and the crystal structure is obtained from the difference Fourier electron density map using the SHELXL-97 direct method, and the Lorentz and polarization effects fix. All H atoms were synthesized by difference Fourier and determined by ideal position calculation. The detailed crystal determination data are shown in Table 1. structure see figure 1 , figure 2 shown.

[0033] Table 1 [Eu(PDA) 3 Fe 1.5 (H 2 O) 3 ]·1.5H 2 Crystallographic data for O

[0034]

[0035]

[0036] (1) [Eu(PDA) 3 Fe 1.5 (H 2 O) 3 ]·1.5H 2 ...

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Abstract

An Eu(III)-Fe(II) luminescent nanometer tube, its production and use are disclosed. The structural formula is (Eu(PDA)3Fe1.5(H2O)3).1.5H2O, PDA=2, 6-pyridine diacid ligand. MgC12 is added into N,N'-dimethyl-methane amide solution, transmitting-peak strength is increased with Mg2+ ion concentration increasing. It has stable three-dimensional nanometer tubular structure; it can be used as Mg2+ ion fluorescent mark and used for biological molecular discrimination.

Description

【Technical field】 [0001] The present invention relates to the preparation method of nano-luminescent material, especially a kind of Eu(III)-Fe(II) luminescent nano-tube with stable three-dimensional nano-tubular structure, and can be used as fluorescent label of magnesium ion and its preparation method and biomolecule recognition applications. 【Background technique】 [0002] In recent years, the research on rare earth-transition mixed metal coordination polymers has opened up a new field for exploring new multifunctional materials such as catalysis, adsorption, fluorescent labeling, and magnetic storage. However, so far, there are few reports on rare earth-transition mixed metal coordination polymers in the literature, and the three-dimensional structure is particularly rare [P.Cheng et al., Angew.Chem.Int.Ed., 934, 42, 2003 ; P. Cheng et al., J. Am. Chem. Soc., 126, 3012, 2004]. The reason why the structures of rare earth-transition mixed metal coordination polymers are r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06G01N33/52
Inventor 程鹏赵斌
Owner NANKAI UNIV