Design of wide field-of-view head-mounted display optical system with double freeform surfaces

	Design of wide field-of-view head-mounted display optical system with double freeform surfaces
	Meng, X.; W. Liu; D. Zhang; G. Jiang; X. Zhu and J. Yang
	2016
发表期刊	Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
卷号	45 期号:4
摘要	It is a big challenge to homogenize heterogeneous catalysts with molecular catalytic performance. With this target in mind, herein, we describe a facile strategy for direct incorporation of single catalytic sites in 3D open porous aromatic frameworks (PAFs). The synthesis of the PAF (denoted as PAF-76) as well as its derivatives (PAF-76-M, M=Fe, Mn, Zn) was achieved by the use of tetrakis(4-bromophenyl)methane as tetrahedral nodes and tetrakis(4-bromophenyl)porphyrin as planar nodes. The connection of monomers into an extended network of PAF-76 was monitored by C-13 NMR and FTIR spectroscopies. The prepared PAF-76s showed 3D porous structures with surface areas of 450-700 m(2) g(-1), pore volumes of 0.3-0.4 cm(3) g(-1), and pore sizes around 1.2 nm. The direct incorporation of metalloporphyrin components into the PAF-76-M frameworks has allowed the uniform distribution of metal ionic sites throughout the PAF-76-M particles. The combined merits of isolated metal sites and suitable pore size make PAF-76 a good candidate for heterogeneous catalysis. The catalytic performances of the porphyrin/ metalloporphyrin-based active sites in the PAF-76s were evaluated by aerobic oxidation reactions of styrene, which are usually carried out with homogeneous systems. Metal-functionalized PAF-76s (PAF-76-M) exhibit enhanced turnover frequencies for styrene conversion (16.9-50.9 mol mol (M)(-1) h(-1)) compared with molecular catalysts (0-35.0 molmol (M)(-1) h(-1)), and improved selectivity toward phenylacetaldehyde (85.799%) in contrast to their corresponding monomers (0-75.5 %). The robustness of PAF-76 in terms of high thermal stability, good recyclability, and excellent solvent resistance showed that these PAF-76 materials hold great promise for developing heterogeneous catalysts.
文章类型	期刊
收录类别	EI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/57148
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Meng, X.,W. Liu,D. Zhang,et al. Design of wide field-of-view head-mounted display optical system with double freeform surfaces[J]. Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,2016,45(4).
APA	Meng, X.,W. Liu,D. Zhang,G. Jiang,&X. Zhu and J. Yang.(2016).Design of wide field-of-view head-mounted display optical system with double freeform surfaces.Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,45(4).
MLA	Meng, X.,et al."Design of wide field-of-view head-mounted display optical system with double freeform surfaces".Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering 45.4(2016).

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