60532-62-9Relevant articles and documents
High anhydrous proton conductivity of imidazole-loaded mesoporous polyimides over a wide range from subzero to moderate temperature
Ye, Yingxiang,Zhang, Liuqin,Peng, Qinfang,Wang, Guan-E,Shen, Yangcan,Li, Ziyin,Wang, Lihua,Ma, Xiuling,Chen, Qian-Huo,Zhang, Zhangjing,Xiang, Shengchang
, p. 913 - 918 (2015)
On-board fuel cell technology requires proton conducting materials with high conductivity not only at intermediate temperatures for work but also at room temperature and even at subzero temperature for startup when exposed to the colder climate. To develop such materials is still challenging because many promising candidates for the proton transport on the basis of extended microstructures of water molecules suffer from significant damage by heat at temperatures above 80 °C or by freeze below -5 °C. Here we show imidazole loaded tetrahedral polyimides with mesopores and good stability (Im@Td-PNDI 1 and Im@Td-PPI 2) exhibiting a high anhydrous proton conductivity over a wide temperature range from -40 to 90 °C. Among all anhydrous proton conductors, the conductivity of 2 is the highest at temperatures below 40 °C and comparable with the best materials, His@[Al(OH)(1,4-ndc)]n and [Zn3(H2PO4)6(H2O)3](Hbim), above 40 °C.
Inclusion compounds of tetrakis(4-nitrophenyl)methane: C-H···O networks, pseudopolymorphism, and structural transformations
Thaimattam,Xue,Sarma,Mak,Desiraju
, p. 4432 - 4445 (2001)
Tetrakis(4-nitrophenyl)methane is a new host material with considerable structural adaptability over a range of solvents. The crystal structures of 14 of these solvates have been determined and classified into three groups. The diamondoid group, wherein t
A novel 3D covalent organic framework membrane grown on a porous α-Al2O3 substrate under solvothermal conditions
Lu, Hui,Wang, Chang,Chen, Juanjuan,Ge, Rile,Leng, Wenguang,Dong, Bin,Huang, Jun,Gao, Yanan
, p. 15562 - 15565 (2015)
A novel approach to grow a 3D COF-320 membrane on a surface-modified porous α-Al2O3 substrate is developed. A compact and uniform COF-320 membrane with a layer thickness of ~4 μm is obtained. This is the first reported 3D COF functional membrane fabricated successfully on a common porous α-Al2O3 ceramic support. The gas permeation results indicate that the gas transport behavior is mainly governed by the predicted Knudsen diffusion process due to the large nanopores of 3D COF-320.
Tetrahedral n-type materials: Efficient quenching of the excitation of p-type polymers in amorphous films
Ganesan, Palaniswamy,Yang, Xiaoniu,Loos, Joachim,Savenije, Tom J.,Abellon, Ruben D.,Zuilhof, Han,Sudhoelter, Ernst J. R.
, p. 14530 - 14531 (2005)
Tetrahedral naphthalenediimide compound 1 has been synthesized as an example of a new class of amorphous n-type materials, in which the nondirectionality obtained by its shape is decoupled from its optoelectronic properties. 1 forms bicontinuous films with p-type polymers and effectively quenches the excited state, yielding long-lived mobile charge carriers on pulsed illumination. Copyright
Scalable Synthesis of Tetrapodal Octaamine
Ahmad, Ishfaq,Mahmood, Javeed,Baek, Jong-Beom
, p. 2335 - 2338 (2019)
An effective and high-yielding synthesis of an air stable tetrapodal octaamine, a rigid shape-persistent molecule with four ortho-phenylenediamine moieties is reported. It can be potentially transformed into a wide range of benzimidazole, benzotriazole, and pyrazine derivatives for practical applications.
Three-Dimensional Radical Covalent Organic Frameworks as Highly Efficient and Stable Catalysts for Selective Oxidation of Alcohols
Chen, Fengqian,Ding, Jiehua,Fang, Qianrong,Guan, Xinyu,Li, Hui,Qiu, Shilun,Tang, Bin,Valtchev, Valentin,Yan, Yushan,Zhu, Liangkui
supporting information, p. 22230 - 22235 (2021/09/03)
With excellent designability, large accessible inner surface, and high chemical stability, covalent organic frameworks (COFs) are promising candidates as metal-free heterogeneous catalysts. Here, we report two 3D radical-based COFs (JUC-565 and JUC-566) in which radical moieties (TEMPO) are uniformly decorated on the channel walls via a bottom-up approach. Based on grafted functional groups and suitable regular channels, these materials open up the application of COFs as highly efficient and selective metal-free redox catalysts in aerobic oxidation of alcohols to relevant aldehydes or ketones with outstanding turn over frequency (TOF) up to 132 h?1, which has exceeded other TEMPO-modified catalytic materials tested under similar conditions. These stable COF-based catalysts could be easily recovered and reused for multiple runs. This study promotes potential applications of 3D functional COFs anchored with stable radicals in organic synthesis and material science.
Cu(ii)Cl2containing bispyridine-based porous organic polymer support preparedviaalkyne-azide cycloaddition as a heterogeneous catalyst for oxidation of various olefins
Choi, Hye Min,Lee, Suk Joong,Yoon, Jongho
supporting information, p. 9149 - 9152 (2020/06/17)
A new type of porous organic polymer (POP) based heterogeneous catalystCu-POPwas prepared by immobilizing Cu(ii)Cl2into bpy containing POP preparedviaalkyne-azide cycloaddition. This new catalyst showed efficient catalytic activities and outstanding reusability. Remarkably, one batch ofCu-POPwas continuously used for all olefins without losing its activity by simply washing.