154239-21-1Relevant articles and documents
Structural diversity, luminescence and photocatalytic properties of six coordination polymers based on designed bifunctional 2-(imidazol-1-yl)terephthalic acid
Zhang, Xiutang,Fan, Liming,Fan, Weiliu,Li, Bin,Liu, Guangzeng,Liu, Xinzheng,Zhao, Xian
, p. 6914 - 6925 (2016)
Six coordination polymers (CPs), {[M(ITA)]·0.5H2O}n (M = Zn 1, M = Mn 2), {[Zn(ITA)(bib)0.5]·1.5H2O}n (3), {[Ni(ITA)(bib)0.5(H2O)3]·H2O}n (4), {[Zn(ITA)(bimb)0.5]·0.5H2O}n (5) and [Cd(ITA)(bimb)0.5(H2O)2]n (6), have been derived from the designed bifunctional 2-(imidazol-1-yl)terephthalic acid (H2ITA) with or without bis(imidazole) linkers (bib = 1,4-bis(imidazol-1-yl)benzene, bimb = 1,4-bis(imidazol-1-ylmethyl)benzene). X-Ray single-crystal diffraction analysis reveals that complexes 1 and 2 are isomorphic with the same 3D (4)-connected {4·63·82} net. Complex 3 features a 3D 2-fold interpenetrated (3,4)-connected fsc net with point symbol of {4·82·103}{4·82}. Complex 4 displays a 2D 3-connected {63)-hcb sheet, which can be further expanded into a 3D supramolecular network through hydrogen bonding interactions. Complex 5 exhibits an unprecedented 3D 2-fold interpenetrated (3,4)-connected dmc net with point symbol of {4·82}{4·85}. Complex 6 shows a 3D (3,4)-connected {4·82·103}{4·82}-fsc net. Structural comparison reveals that not only the coordination preferences of metal ions but also the auxiliary bis(imidazole) linkers play crucial roles in the control of the final structures. Besides, the photoluminescence properties as well as the photocatalytic activities for the degradation of methylene blue (MB) under UV-vis light of 1, 3, 5 and 6 have been investigated.
Entropy effect of alkyl tails on phase behaviors of side-chain-jacketed polyacetylenes: Columnar phase and isotropic phase reentry
Liu, Xiaoqing,Wang, Jun,Yang, Shuang,Men, Yongfeng,Sun, Pingchuan,Chen, Er-Qiang
, p. 260 - 267 (2016)
We have investigated phase behaviors of a series of polyphenylacetylene derivatives, poly[di(n-alkyl) ethynylterephthalates] (Pn, n is the number of carbon atoms of n-alkyl group, from 2 to 14), which are largely influenced by the length of n-alkyl tails on 2,5-position of the phenyl group. With short alkyl groups (n ≤ 6), Pns form columnar liquid crystalline (Col) phases due to the "jacketing effect" of side-chains. As the alkyl tails become longer (n ≥ 8), an isotropic phase, which can be considered as a reentrant one (Ire), is identified between lamellar phase (Lam) at low temperatures and Col phase at high temperatures. This unusual phase behavior is determined by the motional state of the side-chains. Thanks to in-situ variable temperature solid-state NMR experiments, the motion of main- and side-chains in different phases were distinguished, providing strong evidence for the entropy effect of side-chains which drives Ire and then Col phase in Pns (n ≥ 8) upon heating.
AMPHIPHOBIC POROUS MATERIALS
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Paragraph 0096; 0097, (2018/07/31)
A variety of amphiphobic porous materials are provided. The materials can include a variety of porous frameworks that have an outer surface functionalized by a plurality of perfluoroalkyl moieties. By careful selection of appropriate perfluoralkyl moieties, hydrophobic properties can be imparted to the exterior surface of the porous materials without significantly impacting the wetting properties of the porous interior. This can be used to create a variety of highly amphiphobic porous materials. Methods of making and using the amphiphobic porous materials are also provided.
Syntheses and crystal structures of three coordination polymers based on terphenyl-2,5,2,5-tetracarboxylic acid
Zhang, Xiutang,Fan, Liming,Sun, Zhong,Zhang, Wei,Li, Dacheng,Wei, Peihai,Li, Bin,Dou, Jianmin
, p. 3205 - 3215 (2012/11/13)
Solvothermal reactions of terphenyl-2,5,2,5-tetracarboxylic acid (H 4qptc) and MII (M=Co, Ni, Cu) in the presence of 2,2-bipyridine (2,2-bpy) afford three new coordination polymers, [M(qptc) 0.5(2,2-bpy)(H2O)]n (M=Co (1), Ni (2)) and [Cu(H2qptc)(2,2-bpy)]n (3). The structures have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses, IR, and TGA. Complexes 1 and 2 are isostructural and display a 2-D layer wherein qptc4 is a twisted H-shaped ligand connecting CoII centers. Furthermore, 3-D structures in 1 and 2 are formed via inter-chain interactions between neighboring 2,2-bpy ligands, with the centroid-centroid distances of 3.619-3.822. In 3, two deprotonated carboxyl groups of H2qptc2 are a Z-shaped ligand linking CuII centers to a 1-D zigzag polymeric chain. A 2-D layer structure is built with the help of inter-chain interactions between the 2,2-bpy and H2qptc2.
Synthesis of soluble phenyl-substituted poly(p-phenylenevinylenes) with a low content of structural defects
Johansson, D. Mikael,Wang, Xiangjun,Johansson, Tomas,Inganaes, Olle,Yu, Gang,Srdanov, Gordana,Andersson, Mats R.
, p. 4997 - 5003 (2007/10/03)
The synthesis and characterization of two new soluble poly(p-phenylenevinylenes) (PPVs) are reported. The polymers are poly(2-(2′,5′-bis(octyloxy)benzene)-1,4-phenylenevinylene) (BOP-PPV) and poly(2-(2′,5′-bis(octyloxy)benzene)-5-methoxy-1,4-phenyleneviny
Sterically hindered fluorenyl-substituted poly(p-phenylenevinylenes) for light-emitting diodes
Lee, Sang Ho,Jang, Bo-Bin,Tsutsui, Tetsuo
, p. 1356 - 1364 (2007/10/03)
A new series of processable dihexylfluorenyl-substituted poly(p-phenylenevinylene) derivatives (DHF-PPVs) were synthesized by dehydrohalogenation-condensation polymerization (GILCH polymerization). The polymers were characterized by NMR, FT-IR, and elemen
