Synthesis and Fluorescent Property of Metal-organic Frameworks with Tunable Fluorescence
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Synthesis and Fluorescent Property of Metal-organic Frameworks with Tunable Fluorescence
Chinese Journal of LuminescenceVol. 31, Issue 3, Pages: 421-426(2010)
作者机构:
1. 安徽大学 化学化工学院,安徽 合肥,230039
2. 蚌埠学院 理学系,安徽 蚌埠,233000
作者简介:
基金信息:
DOI:
CLC:O482.31
Received:16 June 2009,
Revised:02 January 1900,
Published Online:30 June 2010,
Published:30 June 2010
稿件说明:
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LI Zong-qun, ZHANG Min, QIU Ling-guang. Synthesis and Fluorescent Property of Metal-organic Frameworks with Tunable Fluorescence[J]. Chinese journal of luminescence, 2010, 31(3): 421-426.
DOI:
LI Zong-qun, ZHANG Min, QIU Ling-guang. Synthesis and Fluorescent Property of Metal-organic Frameworks with Tunable Fluorescence[J]. Chinese journal of luminescence, 2010, 31(3): 421-426.DOI:
Synthesis and Fluorescent Property of Metal-organic Frameworks with Tunable Fluorescence
Nanoporous metal-organic frameworks (MOFs) materials have been developed rapidly in recent years. The materials were constructed of organic ligands and metal ions. Multi-functional MOFs materials were designed by different organic ligands and metal ions
i.e.
Zn
2+
and 1
4-benzenedicarboxylic acid (H
2
BDC) can assembled to 1-D
2-D
3-D MOFs materials. They can be applied in gas storage
chiral separation
catalysis
molecular magnet and photoelectric material. However
only a few examples of porous MOFs with open metal sites have been illustrated for their functional properties
mainly because of the difficulty of constructing robust MOFs that hold open metal sites.In this paper
H
2
BDC and Zn
2+
are chosen to synthesize 1-D MOF by using precipitation method
which is a facile and environmentally friend method. A series of coordination polymers
i.e.
were obtained by substitution and adsorption in the reaction of with different content of 8-hydroxyquinoline. Their structures were characterized by XRD and FT-IR . The results of XRD show no structure change in low content of 8-hydroxyquinoline. How-ever
when
n
(8-Hq) ∶
n
( )=1 ∶ 20
the peaks of XRD have obviously difference to standard chart. It may be attribute to 8-Hq substituting coordination water. When
n
(8-Hq) ∶
n
( )﹥1 ∶ 1
coordination water was substituted whole
and the adsorption effects is dominant. TEM images showed nanocrystals of are grown with increase of 8-Hq concentration.Nanocrystals of and exhibit strong solid state fluorescence properties. Fluorescence emission spectra revealed that the wavelength of maximum emission (
λ
em
) redshifts regularly with increasing the amounts of 8-hydroxyquinoline
λ
em
redshifts from 376 nm to 428 nm with
n
(8-Hq) ∶
n
( )=1 ∶ 200~1 ∶ 80. Changing the ratio of
n
(8-Hq) ∶
n
=4 ∶ 1
λ
em
redshifts to 528 nm. These phenomena were explained rationally by fluorescence area integral. The results suggest that emission spectrum can be tuned by varying ratio of to 8-hydroxyquinoline. These kind of metal-organic frameworks have potential applications for display devices
fluorescence imaging
and fluorescence label
and so on.
关键词
Keywords
references
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