期刊
ADVANCED OPTICAL MATERIALS
卷 3, 期 4, 页码 583-592出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201400638
关键词
ion exchange; luminescence; nanocrystals; topotactic; transformation
资金
- National Basic Research Program of China (973 Program) [2014CB643803]
- National Natural Foundation of China [21271167]
- Fund for Creative Research Groups [21221061]
A novel two-step topotactic transformation (TT) synthetic route, Y-2(OH)(5)NO3 center dot nH(2)O (LYH)Y(OH)(2.02)F0.98YOF, is first developed for the monodisperse YOF:Re3+ (Re = Eu, Tb, Yb/Er, and Yb/Tm) nanostructure with bundle, tube, and atomically thick sheet morphologies. The intermediate Y(OH)(2.02)F-0.98 precursor is synthesized from the starting point of the {0001} plane, which forms by a novel type of ion-exchange from the brucite-like LYH due to the structural similarity between the [Y-2(OH)(5)(H2O)(n)](+) unit layer and the Y(OH)(2.02)F-0.98 {0001} plane. Such ion-exchange behavior is different from the traditional case for LYH exchanging the intercalated anions. The detailed structural characterization reveals that the formation of YOF is attributed to an in situ TT with the structural matching of [0001]Y(OH)(2.02)F-0.98//[110]YOF. Moreover, this novel synthetic route can be also extended to other lanthanides oxyfluorides series (LnOF, Ln = Pr-Lu), and the as-prepared YOF:Re3+ products exhibit intense characteristic down/upconversion luminescence. Our synthetic strategy dovetails well with the green concept in the current nanoscience and nanotechnology, which may bring new opportunity to LRHs and open a new avenue in the synthetic methodology for micro/nanomaterials.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据