Research on the Spectral Analysis and Stability of Ultraviolet-Enhanced Thin Films with Stable and Tunable Graphene Oxide-Rare Earth Complexes

doi:10.3964/j.issn.1000-0593(2020)02-0379-06

	Research on the Spectral Analysis and Stability of Ultraviolet-Enhanced Thin Films with Stable and Tunable Graphene Oxide-Rare Earth Complexes
	Li Zhi-yuan 3; Liu Xue-lian 1,3; Zheng An-dong 3; Wang Guo-dong 3; Xia Guo 2,3; Lu Hong-bo 1,3
刊名	SPECTROSCOPY AND SPECTRAL ANALYSIS
	2020-02-01
卷号	40
关键词	Graphene oxide sheets Rare earth complex UV enhanced film Tunable and stable
ISSN号	1000-0593
DOI	10.3964/j.issn.1000-0593(2020)02-0379-06
通讯作者	Lu Hong-bo(bozhilu@hfut.edu.cn)
英文摘要	As a new two-dimensional sheet material, graphene oxide sheets (GOSs) offers many advantages, such as high specific surface area, abundant surface oxygen-containing functional groups and good photothermal stability. In particular, rare earth complexes formed with GOSs exhibit excellent fluorescent characteristics from the combination of the inorganic rare earth element and the organic ligand. In order to combine the physicochemical properties of the two types of materials for applications in the field of ultraviolet (UV) spectroscopy, GOSs was compounded with rare earth complexes through means of hydrogen bond self-assembly, with appropriate organic ligands, namely phenanthroline (phen) and 2' 2-bipyrimidine (bpm) , being used as bridging molecules. This method was used to prepare the highly stable and tunable GOSs-rare earth complex fluorescent materials GOSs-Eu(BA)(3)phen and GOSs-Eu(TTA)(3)bpm. A corresponding poly vinyl alcohol (PVA) mixed UV enhanced film was also prepared for each GOSs-rare earth complex, respectively. The properties of the materials were studied using infrared (IR) spectroscopy, scanning electron microscopy (SEM) , and metallographic microscopy. The films were also characterized by their absorption and fluorescence spectra. In addition, the thermal stability of the UV-enhanced materials was tested using thermogravimetric analysis (TGA) , and the photostability of the UV-enhanced film before and after reacting with the hydrogen bonds of the GOSs was tested using fluorescence intensity experiments. IR spectroscopy results showed that the characteristic absorption peaks of the organic ligands shifted after the complex formation, indicating that there is significant coordination between Eu3+ and the ligands in the rare earth complex. In addition, the characteristic chemical shift peaks of the bridging ligands also shifted, showing that the GOSs and the rare earth complexes were combined through hydrogen bonding of the bridging molecules. The absorption and fluorescence spectra results indicated that the absorption peak of the enhanced film was in the range of 200 similar to 400 nm, and that the main fluorescence peak was at about 612 nm, which is the characteristic red fluorescent peak of Eu3+. Different ligands achieved different absorption ranges, thus leading to differences in fluorescence behavior. The pictures from SEM and metallographic microscopy clearly showed that the rare earth complex particles adhered to the graphene sheet after the compositing process. The photostability test further showed that, following the compositing process, the photobleaching degree of Eu(BA)(3)phen and Eu(TAA)(3)bpm rare earth complex fluorescent materials decreased by 4. 26% and 6. 41% respectively, after 25 fluorescence intensity tests. The TGA results showed that the thermal stability of the rare earth complexes was greatly improved after the formation of hydrogen bonds with GOSs. In summary, the prepared UV-enhanced materials were shown to exhibit excellent fluorescent characteristics and stability, and will have broad applications in UV detection, especially in the field of narrow-band differential detection.
WOS研究方向	Spectroscopy
语种	英语
出版者	OFFICE SPECTROSCOPY & SPECTRAL ANALYSIS
WOS记录号	WOS:000528834600008
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103429]
专题	中国科学院合肥物质科学研究院
通讯作者	Lu Hong-bo
作者单位	1.Hefei Univ Technol, Sch Chem & Chem Engn, Key Lab Adv Funct Mat & Devices, Hefei 230009, Peoples R China 2.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Opt Calibrat & Characterizat, Hefei 230031, Peoples R China 3.Hefei Univ Technol, Acad Optoelect Technol, Natl Engn Lab Special Display Technol, State Key Lab Adv Display Technol, Hefei 230009, Peoples R China
推荐引用方式 GB/T 7714	Li Zhi-yuan,Liu Xue-lian,Zheng An-dong,et al. Research on the Spectral Analysis and Stability of Ultraviolet-Enhanced Thin Films with Stable and Tunable Graphene Oxide-Rare Earth Complexes[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2020,40.
APA	Li Zhi-yuan,Liu Xue-lian,Zheng An-dong,Wang Guo-dong,Xia Guo,&Lu Hong-bo.(2020).Research on the Spectral Analysis and Stability of Ultraviolet-Enhanced Thin Films with Stable and Tunable Graphene Oxide-Rare Earth Complexes.SPECTROSCOPY AND SPECTRAL ANALYSIS,40.
MLA	Li Zhi-yuan,et al."Research on the Spectral Analysis and Stability of Ultraviolet-Enhanced Thin Films with Stable and Tunable Graphene Oxide-Rare Earth Complexes".SPECTROSCOPY AND SPECTRAL ANALYSIS 40(2020).