Issue 39, 2016
From the journal:

CrystEngComm

Fast synthesis of β-NaYF4:Ln3+ (Ln = Yb/Er, Yb/Tm) upconversion nanocrystals via a topotactic transformation route

Yang Feng,ab   Baiqi Shao,ab   Yan Song,ab   Shuang Zhao,ab   Jiansheng Huo,ab   Wei Lüa  and  Hongpeng You*a  

* Corresponding authors

a State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, University of Chinese Academy of Sciences, Changchun 130022, PR China
E-mail: hpyou@ciac.ac.cn

b Graduate School of the Chinese Academy of Sciences, Beijing 100049, PR China

Abstract

Monodisperse β-NaYF4:Ln3+ (Ln = Yb/Er, Yb/Tm) upconversion nanocrystals have been fast synthesized using layered yttrium hydroxide Y2(OH)5NO3·nH2O (LYH) via a topotactic transformation route bypassing the α-NaYF4 intermediate phase. It was found that the topotactic structural matching of [001]LYH//[0001]β-NaYF4 facilitated the direct formation of β-NaYF4, wherein the kinetic α-NaYF4 intermediate phase could be avoided at the initial reaction stage. Besides, the morphology could be effectively tuned by manipulating the NaF/Y(NO3)3 feeding ratio. In addition, the upconversion luminescence properties of the as-prepared β-NaYF4:15%Yb3+/2%Er3+ and β-NaYF4:15%Yb3+/1%Tm3+ were also systematically investigated.

Graphical abstract: Fast synthesis of β-NaYF4:Ln3+ (Ln = Yb/Er, Yb/Tm) upconversion nanocrystals via a topotactic transformation route

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Article information

DOI
https://doi.org/10.1039/C6CE01583B
Article type
Paper
Submitted
18 Jul 2016
Accepted
22 Aug 2016
First published
22 Aug 2016

CrystEngComm, 2016,18, 7601-7606

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Fast synthesis of β-NaYF4:Ln3+ (Ln = Yb/Er, Yb/Tm) upconversion nanocrystals via a topotactic transformation route

Y. Feng, B. Shao, Y. Song, S. Zhao, J. Huo, W. Lü and H. You, CrystEngComm, 2016, 18, 7601 DOI: 10.1039/C6CE01583B

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