NDLI: Fluorescent $LaVO_{4}:Eu^{3+}$ micro/nanocrystals: pH-tuned shape and phase evolution and investigation of the mechanism of detection of $Fe^{3+}$ ions

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zhu, Yaqiong Ni, Yonghong Sheng, Enhong
Description	Author Affiliation: Zhu Y ( College of Chemistry and Materials Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, 1 Beijing Eastern Road, Wuhu, 241000, PR China. niyh@mail.ahnu.edu.cn.)
Abstract	$LaVO_{4}:Eu^{3+}$ micro/nanocrystals with various shapes were hydrothermally synthesized by adjusting the pH of the system at 180 °C for 12 h in the presence of ethylenediaminetetraacetic acid (EDTA). The shape and phase of the final product were characterized by field emission scanning electron microscopy (FESEM) and X-ray powder diffraction (XRD). Experiments showed that when the other conditions were kept unchanged, the shape of the final product changed from hollow microspheres constructed by nanorods to long nanorods, to short nanorods and finally to grains with microscale sizes with the pH increase from 4.0, 7.0, 11.0 to 13.0 in the system. Meanwhile, the $t-LaVO_{4}$ phase was always obtained from the system at pH below 13.0 and the $m-LaVO_{4}$ phase was formed at pH 13.0. It was found that the final product with various shapes presented different luminescence performances. $LaVO_{4}:Eu^{3+}$ nanorods obtained from the system at pH 11.0 displayed the strongest luminescence and good fluorescence stability in water. Also, the above strong PL spectrum could be quenched by $Fe^{3+}$ ions without the interference of other ions, indicating that the present product could be used as an efficient fluorescent probe for highly selective detection of $Fe^{3+}$ ions in water systems. The fluorescence quenching mechanism was investigated simultaneously.
ISSN	14779226
Issue Number	21
Journal	Dalton Trans.
Volume Number	45
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2016-06-07
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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