Designed Synthesis and Characterization of Novel Germanium Centered Porous Aromatic Frameworks (Ge-PAFs)

Yuan, Ye; Yan, Zhuojun; Ren, Hao; Liu, Qingying; Zhu, Guangshan; Sun, Fuxing

doi:10.6023/a12040104

Cited by 7 publications

(2 citation statements)

References 4 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…其中 MOPs 具有合成策略多样性、物化性质稳定、比表面积高、骨架密度低、孔道结构易功能化修饰等特点, 因此在气体吸附领域有广泛的应用前景 [5～7] . 迄今为止, 已经有一系列的新型 MOPs 被开发出来 , 包括共轭微孔聚合物 (CMPs) [8～10] 、自具微孔聚合物(PIMs) [11,12] 、共价有机框架(COFs) [13～15] 、超交联聚合物(HCPs) [16～18] 、共价三嗪系框架(CTFs) [19] 和多孔芳环框架(PAFs) [20,21] .…”

Section: 引言unclassified

Synthesis and Gas Sorption Properties of Microporous Poly(arylene ethynylene) Frameworks

Xu¹,

Zhang²,

Wang³

et al. 2017

Acta Chim. Sinica

View full text Add to dashboard Cite

Microporous organic polymers (MOPs) have drawn much attention because of their potential applications such as gas storage, separation and heterogeneous catalysis. There is great interest in the design, synthesis and property evaluation of poly(arylene ethynylenes) (PAEs) with intrinsic microporosity. In addition to Sonogashira coupling reaction between terminal alkynes and halides, the oxidative dimerization of terminal alkynes is an alternating strategy for the buildup of the microporous PAE frameworks. In this paper, a series of MOPs were synthesized by the oxidative dimerization of terminal alkynes using triethynyl monomers such as tris(4-ethynylphenyl)amine, tris(4-ethynylphenyl)methylsilane and polytris(4-ethynylphenyl)phenylsilane. The resulting MOPs were characterized by FT-IR spectra, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (PXRD) measurements. FT-IR spectra indicate the success of the homocoupling reaction for constructing the dialkyne-bridged polymer frameworks. These polymer frameworks exhibit high thermal stability with onset of decomposition temperature above 350 ℃ at 5% mass loss under nitrogen flow. PXRD and TEM measurements revealed that all the polymer frameworks are amorphous solid in nature. These dialkyne-bridged MOPs exhibit moderate surface areas ranging from 602 to 715 m 2 •g-1. The incorporation of triphenylamine moieties into the polymer skeleton increases the number of electron donating basic nitrogen sites in the porous frameworks. Thus, the triphenylamine-based polymer polytris(4-ethynylphenyl)amine (TE-PA-MOP) with the highest Brunauer-Emmett-Teller (BET) surface area shows the highest CO 2 uptake capacity of 1.59 mmol•g-1 at 273 K and 1.13 bar among the resulting polymer frameworks. In addition, TEPA-MOP showed the highest H 2 adsorption up to 1.04 wt% at 1.13 bar and 77 K and polytris(4-ethynylphenyl)phenylsilane (TEPP-MOP) displayed the lowest H 2 adsorption of 0.64 wt% at the same conditions. As for separation of CO 2 , both TEPA-MOP and TEPP-MOP exhibit relatively high CO 2-over-N 2 selectivities of 69.9 and 73.2 at 273 K, respectively. The above results show that TEPA-MOP might be the good candidate for the balanced CO 2 uptake capacity with impressive CO 2 /N 2 selectivity among the microporous PAE frameworks.

show abstract