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Bibliographies thématiques / Poly (2,5-benzimidazole)

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Littérature scientifique sur le sujet « Poly (2,5-benzimidazole) »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 1 février 2022

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Articles de revues sur le sujet "Poly (2,5-benzimidazole)"

1

Conio, G., S. Bisbano, L. Carpaneto, E. Marsano et I. Ponomarev. « Poly[2-phenylene-(5-benzimidazole)] isophthalamide : macromolecular characterization ». Polymer 36, n^o 19 (janvier 1995) : 3733–37. http://dx.doi.org/10.1016/0032-3861(95)93777-j.

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2

Zheng, Wenxu, et Kechen Wu. « Anion-directed assemblies of europium(III) coordination polymers based on 1H-benzimidazole-5,6-dicarboxylate : structures and luminescence properties ». Acta Crystallographica Section C Structural Chemistry 76, n^o 2 (30 janvier 2020) : 186–92. http://dx.doi.org/10.1107/s2053229620000637.

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Two europium(III) coordination polymers (CPs), namely, poly[[diaquabis(μ4-1H-benzimidazole-5,6-dicarboxylato-κ6 N 3:O 5,O 5′:O 5,O 6:O 6′)(μ2-oxalato-κ4 O 1,O 2:O 1′,O 2′)dieuropium(III)] dihydrate], {[Eu2(C9H4N2O4)2(C2O4)(H2O)2]·2H2O} n (1), and poly[(μ3-1H-benzimidazol-3-ium-5,6-dicarboxylato-κ5 O 5:O 5′,O 6:O 6,O 6′)(μ3-sulfato-κ3 O:O′:O′′)europium(III)], [Eu(C9H5N2O4)(SO4)] n (2), have been synthesized via the hydrothermal method and structurally characterized. CP 1 shows a three-dimensional network, in which the oxalate ligand acts as a pillar, while CP 2 has a two-dimensional network based on a europium(III)–sulfate skeleton, further extended into a three-dimensional framework by hydrogen-bonding interactions. The structural diversity in the two compounds can be attributed to the different acidification abilities and geometries of the anionic ligands. The luminescence properties of 1 display the characteristic europium red emission with CIE chromaticity coordinates (2/3, 0.34). Interestingly, CP 2 shows the characteristic red emission with CIE chromaticity coordinates (0.60, 0.34) when excited at 280 nm and a near-white emission with CIE chromaticity coordinates (0.38, 0.29) when excited at 340 nm.

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3

Rani, Varsha, Harkesh B. Singh et Ray J. Butcher. « Synthesis and structure of the mercury chloride complex of 2,2′-(2-bromo-5-tert-butyl-1,3-phenylene)bis(1-methyl-1H-benzimidazole) ». Acta Crystallographica Section E Crystallographic Communications 73, n^o 3 (10 février 2017) : 341–44. http://dx.doi.org/10.1107/s2056989017001888.

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In the title mercury complex,catena-poly[[dichloridomercury(II)]-μ-2,2′-(2-bromo-5-tert-butyl-1,3-phenylene)bis(1-methyl-1H-benzimidazole)-κ2N3:N3′], [HgCl2(C26H25BrN4)]n, the HgIIatom is coordinated by two Cl atoms and by two N atoms from two 2,2′-(2-bromo-5-tert-butyl-1,3-phenylene)bis(1-methyl-1H-benzimidazole) ligands. The metal cation adopts a distorted tetrahedral coordination geometry with with bond angles around mercury of 100.59 (15)° [N—Hg—N] and 126.35 (7)° [Cl—Hg—Cl]. This arrangement gives rise to a zigzag helical 1-D polymer propagating along theb-axis direction.

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4

Bianchi, Estella, Enrico Marsano, Camilla Costa, Giuseppina Conio et Stefania Bisbano. « Ternary systems involving rod/coil/solvent : poly(p-benzamide)/poly(2-phenylene(5-benzimidazole)-isophthalamide)/dimethylacetamide + LiCl ». Macromolecular Chemistry and Physics 198, n^o 4 (avril 1997) : 1239–48. http://dx.doi.org/10.1002/macp.1997.021980425.

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5

Toiserkani, Hojjat. « Synthesis and evaluation of properties of novel aromatic poly(ether-imide) with benzazole pendent groups and flexible ether linkages ». High Performance Polymers 23, n^o 7 (novembre 2011) : 542–54. http://dx.doi.org/10.1177/0954008311421988.

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Three types of new bis(ether-amine) monomers such as 5-(2-benzimidazole)-1,3-bis(4-aminophenoxy)benzene (3), 5-(2-benzoxazole)-1,3-bis(4-aminophenoxy)benzene (4), and 5-(2-benzothiazole)-1,3-bis(4-aminophenoxy)benzene (5) were prepared in three steps, starting from the reaction of 3,5-dihydroxybenzioc acid with 4-fluronitrobenzene in N, N-dimethylformamide (DMF) solution in the presence of potassium carbonate, followed by catalytic reduction of the intermediate dinitro-carboxylic acids, and subsequent condensation of the resulting diamino-carboxylic acids and 1,2-phenylenediamine, 2-aminophenol or 2-aminothiophenol in polyphosphoric acid (PPA), respectively. Three series of modified poly(ether-imide)s (PEIs) bearing pendent benzimidazole, benzoxazole or benzothiazole groups were prepared from the bis(ether-amine)s with dianhydrides by a conventional two-stage process that included ring-opening polycondensation forming the poly(amic acid)s (PAA) and further thermal or chemical imidization forming poly(ether-imide)s. For comparative purposes, reference poly(ether-imide)s were also prepared by reacting bis(ether-amine) lacking pendent groups namely 1,3-bis(4-aminophenoxy)benzene (6) with the same dianhydrides under similar conditions. The modified polymers were obtained in quantitative yields with inherent viscosities between 0.52 and 0.83 dL g−1. Experimental results indicated that all the PEIs had glass transition temperature between 221 and 283 °C, the decomposition temperature at 10% weight loss between 480 and 572 °C under nitrogen.

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6

Rani, Varsha, Harkesh B. Singh et Ray J. Butcher. « Structure of the mercury(II) mixed-halide (Br/Cl) complex of 2,2′-(5-tert-butyl-1,3-phenylene)bis(1-pentyl-1H-benzo[d]imidazole) ». Acta Crystallographica Section E Crystallographic Communications 73, n^o 3 (21 février 2017) : 423–28. http://dx.doi.org/10.1107/s2056989017002183.

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The mercury(II) complex of 2,2′-(5-tert-butyl-1,3-phenylene)bis(1-pentyl-1H-benzimidazole), namelycatena-poly[[dihalogenidomercury(II)]-μ-2,2′-(5-tert-butyl-1,3-phenylene)bis(1-pentyl-1H-benzimidazole)-κ2N3:N3′], [HgBr1.52Cl0.48(C34H42N4)],2, has a polymeric structure bridgingviathe N atoms from the benzimidazole moieties of the ligand. The compound crystallizes in the orthorhombic space groupPca21and is a racemic twin [BASF = 0.402 (9)]. The geometry around the HgIIatom is distorted tetrahedral, with the HgIIatom coordinated to two N atoms, one Br atom, and a fourth coordination site is occupied by a mixed halide (Br/Cl). For the two ligands in the asymmetric unit, there is disorder with one of the twotert-butyl groups and benzimidazole moieties showing twofold disorder, with occupancy factors of 0.57 (2):0.43 (2) for thetert-butyl group and 0.73 (3):0.27 (3) for the benzimidazole group. In addition, there is threefold disorder for two of the fourn-pentyl groups, with occupancy factors of 0.669 (4):0.177 (4):0.154 (4) and 0.662 (4):0.224 (4):0.154 (4), respectively. The molecules form a one-dimensional helical polymer propagating in theb-axis direction. The helices are held together by intra-strand C—H...Br and C—H...Cl interactions. Each strand is further linked by inter-strand C—H...Br and C—H...Cl interactions. In addition, there are weak C—H...N inter-strand interactions which further stabilize the structural arrangement.

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7

Yu, Mingfu, Hong Sun, Tianyu Zhang, Qiang Li, Jie Li et Xiaochen Zhang. « Current density distribution in an HT-PEM fuel cell with a poly (2, 5-benzimidazole) membrane ». International Journal of Hydrogen Energy 46, n^o 3 (janvier 2021) : 3022–31. http://dx.doi.org/10.1016/j.ijhydene.2020.04.117.

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8

Conio, G., S. Bisbano, E. Marsano, A. Tealdi et E. Bianchi. « Lyotropic block copolymers of poly(p-benzamide) and poly[2-phenylene (5-benzimidazole)] : The ternary system copolymer/poly(p-benzamide)/dimethylacetarnide—lithium chloride ». Polymer 39, n^o 11 (janvier 1998) : 2119–22. http://dx.doi.org/10.1016/s0032-3861(97)00541-7.

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9

Kawski, A., Z. Gryczyński, I. Gryczyński, J. R. Lakowicz et G. Piszczek. « Photoselection of Luminescent Molecules in Anisotropic Media in the Case of Two-Photon Excitation. Part II. Experimental Studies of Hoechst 33342 in Stretched Polyvinyl alcohol) Films ». Zeitschrift für Naturforschung A 51, n^o 9 (1 septembre 1996) : 1037–41. http://dx.doi.org/10.1515/zna-1996-0910.

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Abstract It was found by investigating dichroism and emission anisotropy in the case of one-and two-photon excitation of Hoechst 33342 [bis-benzimide,2,5'-bi-1H-benzimidazole, 2'-(4-ethoxyphenyl)-5-5(4-methyl-1-piperazinyl)] in stretched poly(vinyl alcohol) (PVA) films, that the absorption and fluorescence transition moments lie along the long molecular axis of the molecule studied. The slight deviation of the transition moment direction in fluorescence (about 8°) from that in absorption can be due to the incomplete linearity of the Hoechst molecule.

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10

Nayak, Ratikanta, et Prakash C. Ghosh. « Mechanical and Impedance analysis of Poly (2, 5) benzimidazole proton exchange membrane for high temperature fuel cell Application ». Materials Today : Proceedings 5, n^o 5 (2018) : 13767–75. http://dx.doi.org/10.1016/j.matpr.2018.02.017.

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