期刊
SMALL
卷 9, 期 4, 页码 561-569出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201200558
关键词
coordination polymers; photoluminescence; hollow structures; lanthanides; Eu3+ dopants
类别
资金
- NLRL [2011-0028321]
- WCU program [R32-2008-000-10217-0]
- Pioneer Converging Technology Program through NRF [2009-0081506]
- MEST
- Ministry of Education and Human Resources
- National Research Foundation of Korea [R32-2012-000-10217-0, 2012R1A2A1A03670409] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The conjugation of Eu3+-doped coordination polymers constructed from Gd3+ and isophthalic acid (H2IPA) with silica particles is investigated for the production of luminescent microspheres. A series of doping ratio-controlled silica@coordination polymer coreshell spheres is easily synthesized by altering the amounts of metal nodes used in the reactions, where the ratios of Gd3+ and Eu3+ are 10:0 (1a), 9:1 (1b), 8:2 (1c), 7:3 (1d), 5:5 (1e), and 0:10 (1f). The formation of monodisperse uniform coreshell structures is achieved throughout the entirety of a series. Investigations of the photoluminescence property of the resulting series of silica@coordination polymer coreshell spheres reveal that 20% Eu3+-doped product (1c) has the strongest emission intensity. The subsequent calcination process on the silica@coordination polymer coreshell structures (1a-f) results in the formation of a series of doping ratio-controlled silica@Gd2O3:Eu coreshell microspheres (2a-f) with uniform shell thickness. During the calcination step, the coordination polymers within silica@coordination polymer coreshells are transformed into metal oxides, resulting in silica@Gd2O3:Eu coreshell structures. The final etching process on the silica@Gd2O3:Eu coreshell microspheres (2a-f) produces a series of hollow Gd2O3:Eu microspheres (3a-f) as a result of the elimination of silica cores. The luminescence intensities of silica@Gd2O3:Eu coreshell (2a-f) and hollow Gd2O3:Eu microspheres (3a-f) also vary depending upon the doping ratio of Eu3+ ions.
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