Terbium coordination polymer and its synthesis method and application

A technology of coordination polymers and synthesis methods, applied in chemical instruments and methods, compounds containing elements of Group 3/13 of the periodic table, luminescent materials, etc., can solve the problems of short fluorescence lifetime, etc. Vivid, monochromatic effect

Inactive Publication Date: 2011-12-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention solves the problem of short fluorescence lifetime of existing terbium coordination po...

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  • Terbium coordination polymer and its synthesis method and application
  • Terbium coordination polymer and its synthesis method and application
  • Terbium coordination polymer and its synthesis method and application

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specific Embodiment approach 1

[0012] Embodiment 1: The structure of the terbium coordination polymer in this embodiment is a three-dimensional supramolecular network structure formed by hydrogen bonding and π-π stacking between the one-dimensional chain terbium coordination polymers, and the one-dimensional chain terbium coordination polymer The molecular formula of the bit polymer is Tb(2,2'-bpdc) 1.5 h 2 O.

[0013] in Tb 2 (2,2'-BPDC) 3 (H 2 O) 2 As a structural unit, the central metal terbium has two eight-coordinated coordination modes, one of which is metal Tb(1) and six carboxyl oxygen atoms O1, O1#, O4, O4#, O5, O5# and the oxygen atoms O7 and O7# in the two coordinated water molecules coordinate to form a bond; the other is the metal Tb(2) with the same three 2,2'- The remaining eight carboxyl oxygen atoms O2, O2#, O3, O3#, O4, O4#, O6 and O6# coordinate in phthalic acid. At the same time, the ligand 2,2'-biphenyl dicarboxylic acid has two coordination modes in the coordination polymer. One...

specific Embodiment approach 2

[0019] Specific embodiment two: the synthetic method of terbium coordination polymer is realized through the following steps: at room temperature, terbium nitrate pentahydrate and 2,2'-biphenyl dicarboxylic acid are dissolved in distilled water, terbium nitrate pentahydrate and 2 , the molar ratio of 2'-biphenyldicarboxylic acid is 1:1, stirred and dissolved at room temperature, then placed in a stainless steel reactor lined with polytetrafluoroethylene, heated to 165 ° C, and kept at 165 ° C for reaction 4 After ~6 days, naturally cool to room temperature to obtain terbium coordination polymer.

[0020] The yield of the terbium coordination polymer in this embodiment is about 50%.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment is different from Embodiment 2 in that: the reaction is carried out at 165° C. for 5 days. Other steps and parameters are the same as in the second embodiment.

[0022] The yield of the terbium coordination polymer in this embodiment is 50%.

[0023] Utilize the FLSP920 combined steady-state transient fluorescence / phosphorescence spectrometer to carry out the fluorescence spectrum and fluorescence lifetime test of the organic light-emitting material terbium coordination polymer in this embodiment, and obtain the following results: figure 1 The fluorescence spectra shown and figure 2 The fluorescence lifetime curves are shown. It can be seen that at room temperature and solid state, with 304nm as the excitation wavelength, the characteristic emission peaks of terbium coordination polymers are 488nm ( 5 D. 4 → 7 f 6 ), 543nm ( 5 D. 4 → 5 f 5 ), 589nm ( 5 D. 4 →7F 4 ) and 619nm ( 5 D. 4 → 7 f 3 ), showing the strong green flu...

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Abstract

The invention relates to a terbium coordination polymer and its synthesis method and application, which belong to the field of organic light-emitting materials. The invention aims to solve the technical problem of short fluorescence lifetime of the existing terbium coordination polymers. The structure of the terbium coordination polymer is a three-dimensional supramolecular network structure formed by hydrogen bonding and π-π stacking between the one-dimensional chain terbium coordination polymers. The molecular formula of the one-dimensional chain terbium coordination polymer is Tb(2 , 2'-bpdc) 1.5H2O. Method: Dissolve terbium nitrate pentahydrate and 2,2′-biphenyldicarboxylic acid in distilled water at room temperature, stir to dissolve, place in a reaction kettle, heat for reaction, and naturally cool to room temperature to obtain terbium coordination polymer. In the present invention, the terbium coordination polymer is used as an organic green fluorescent material. Terbium coordination polymers are colorless single crystals. In the solid state at room temperature, with an excitation wavelength of 304nm, it exhibits the typical strong green fluorescence of rare earth terbium ions, with a longer fluorescence lifetime τ of 1004μs.

Description

technical field [0001] The invention belongs to the field of organic green light-emitting materials; in particular, it relates to a terbium coordination polymer and its synthesis method and application. Background technique [0002] In recent years, rare earth elements have become the key elements for the development of high-tech industries, known as the "mother of new materials". The study of rare earth luminescent materials has aroused widespread research interest. Rare earth ions have a larger radius and can accommodate more coordination atoms. Rare earth ions can change and enhance their luminescent properties to a large extent by interacting with abundant and varied ligands. The fluorescence lifetime of existing terbium coordination polymers is short. Contents of the invention [0003] The invention aims to solve the problem of short fluorescence lifetime of the existing terbium coordination polymers, and provides organic green light material terbium coordination po...

Claims

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Application Information

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IPC IPC(8): C07F5/00C09K11/06
Inventor 范瑞清张会杰杨玉林
Owner HARBIN INST OF TECH
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