100884-80-8Relevant articles and documents
Three-Dimensional Tetrathiafulvalene-Based Covalent Organic Frameworks for Tunable Electrical Conductivity
Chang, Jianhong,Fang, Qianrong,Guan, Xinyu,Li, Cuiyan,Li, Daohao,Li, Hui,Li, Shanshan,Qiu, Shilun,Tang, Lingxue,Valtchev, Valentin,Xue, Ming,Yan, Yushan
, (2019)
The functionalization of three-dimensional (3D) covalent organic frameworks (COFs) is essential to broaden their applications. However, the introduction of organic groups with electroactive abilities into 3D COFs is still very limited. Herein we report the first case of 3D tetrathiafulvalene-based COFs (3D-TTF-COFs) with non- or 2-fold interpenetrated pts topology and tunable electrochemical activity. The obtained COFs show high crystallinity, permanent porosity, and large specific surface area (up to 3000 m2/g). Furthermore, these TTF-based COFs are redox active to form organic salts that exhibit tunable electric conductivity (as high as 1.4 × 10-2 S cm-1 at 120 °C) by iodine doping. These results open a way toward designing 3D electroactive COF materials and promote their applications in molecular electronics and energy storage.
Cascade Polymers: Synthesis and Characterization of Four-Directional Spherical Dendritic Macromolecules Based on Adamantane
Newkome, George R.,Nayak, Ashutosh,Behera, Rajani K.,Moorefield, Charles N.,Baker, Gregory R.
, p. 358 - 362 (1992)
The syntheses and spectral characteristics of four-directional spherical dendritic macromolecules utilizing an adamantane core have been described.The dendrimer syntheses utilized 4-amino-4-(3-acetoxypropyl)-1,7-diacetoxyheptane or di-tert-butyl 4-amino-2-heptanedioate as the key building block.An improved synthetic procedure to 1,3,5,7-adamantanetetracarboxylic acid is reported.
A MOF-based Ultra-Strong Acetylene Nano-trap for Highly Efficient C2H2/CO2 Separation
Niu, Zheng,Cui, Xili,Pham, Tony,Verma, Gaurav,Lan, Pui Ching,Shan, Chuan,Xing, Huabin,Forrest, Katherine A.,Suepaul, Shanelle,Space, Brian,Nafady, Ayman,Al-Enizi, Abdullah M.,Ma, Shengqian
, p. 5283 - 5288 (2021)
Porous materials with open metal sites have been investigated to separate various gas mixtures. However, open metal sites show the limitation in the separation of some challenging gas mixtures, such as C2H2/CO2. Herein, we propose a new type of ultra-strong C2H2 nano-trap based on multiple binding interactions to efficiently capture C2H2 molecules and separate C2H2/CO2 mixture. The ultra-strong acetylene nano-trap shows a benchmark Qst of 79.1 kJ mol?1 for C2H2, a record high pure C2H2 uptake of 2.54 mmol g?1 at 1×10?2 bar, and the highest C2H2/CO2 selectivity (53.6), making it as a new benchmark material for the capture of C2H2 and the separation of C2H2/CO2. The locations of C2H2 molecules within the MOF-based nanotrap have been visualized by the in situ single-crystal X-ray diffraction studies, which also identify the multiple binding sites accountable for the strong interactions with C2H2.
Rigid multivalent scaffolds based on adamantane
Nasr, Khaled,Pannier, Nadine,Frangioni, John V.,Maison, Wolfgang
, p. 1056 - 1060 (2008)
(Chemical Equation Presented) We present two new synthetic strategies to rigid multivalent scaffolds of the general structure 1 based on adamantane. Both routes start from arylated adamantane derivatives and give the target compounds 12 and 18 in 5 and 7 steps, respectively. These scaffolds have been designed for the assembly of multivalent binders for cell surface epitopes. The adamantane nucleus exposes three carboxylic acid groups in a well-defined tripodal geometry for conjugation of targeting ligands. In addition, an amino group at the fourth bridgehead position provides a flexible linker for attachment of effector molecules such as contrast agents, radiotracers, or cytotoxins without interfering with the cell binding process.
3D microporous base-functionalized covalent organic frameworks for size-selective catalysis
Fang, Qianrong,Gu, Shuang,Zheng, Jie,Zhuang, Zhongbin,Qiu, Shilun,Yan, Yushan
, p. 2878 - 2882 (2014)
The design and synthesis of 3D covalent organic frameworks (COFs) have been considered a challenge, and the demonstrated applications of 3D COFs have so far been limited to gas adsorption. Herein we describe the design and synthesis of two new 3D microporous base-functionalized COFs, termed BF-COF-1 and BF-COF-2, by the use of a tetrahedral alkyl amine, 1,3,5,7-tetraaminoadamantane (TAA), combined with 1,3,5-triformylbenzene (TFB) or triformylphloroglucinol (TFP). As catalysts, both BF-COFs showed remarkable conversion (96 % for BF-COF-1 and 98 % for BF-COF-2), high size selectivity, and good recyclability in base-catalyzed Knoevenagel condensation reactions. This study suggests that porous functionalized 3D COFs could be a promising new class of shape-selective catalysts.
Chromophore Multiplication To Enable Exciton Delocalization and Triplet Diffusion Following Singlet Fission in Tetrameric Pentacene
Hetzer, Constantin,Basel, Bettina S.,Kopp, Sebastian M.,Hampel, Frank,White, Fraser J.,Clark, Timothy,Guldi, Dirk M.,Tykwinski, Rik R.
, p. 15263 - 15267 (2019)
A tetrameric pentacene, PT, has been used to explore the effects of exciton delocalization on singlet fission (SF). For the first time, triplet decorrelation through intramolecular triplet diffusion was observed following SF. Transient absorption spectros
Photochemical Carbonylation of Adamantanes; Simple Synthesis of 1,3,5,7-Tetracarbomethoxyadamantane
Bashir-Hashemi, A.,Li, Jianchang,Gelber, Nathan
, p. 1233 - 1236 (1995)
1,3,5,7-tetracarbomethoxyadamantane was obtained in one pot from the irradiation of a mixture of 1-adamantanecarboxylic and oxalyl chloride followed by methanolysis.
Self-Adjusting Metal–Organic Framework for Efficient Capture of Trace Xenon and Krypton
Al-Enizi, Abdullah M.,Fan, Ziwen,Forrest, Katherine A.,Ma, Shengqian,Niu, Zheng,Pham, Tony,Space, Brian,Thallapally, Praveen K.,Verma, Gaurav
supporting information, (2022/02/01)
The capture of the xenon and krypton from nuclear reprocessing off-gas is essential to the treatment of radioactive waste. Although various porous materials have been employed to capture Xe and Kr, the development of high-performance adsorbents capable of trapping Xe/Kr at very low partial pressure as in the nuclear reprocessing off-gas conditions remains challenging. Herein, we report a self-adjusting metal-organic framework based on multiple weak binding interactions to capture trace Xe and Kr from the nuclear reprocessing off-gas. The self-adjusting behavior of ATC-Cu and its mechanism have been visualized by the in-situ single-crystal X-ray diffraction studies and theoretical calculations. The self-adjusting behavior endows ATC-Cu unprecedented uptake capacities of 2.65 and 0.52 mmol g?1 for Xe and Kr respectively at 0.1 bar and 298 K, as well as the record Xe capture capability from the nuclear reprocessing off-gas. Our work not only provides a benchmark Xe adsorbent but proposes a new route to construct smart materials for efficient separations.
Rigid C3-symmetric scaffolds based on adamantane
Pannier, Nadine,Maison, Wolfgang
experimental part, p. 1278 - 1284 (2009/04/07)
Efficient syntheses of rigid C3-symmetric scaffolds based on adamantane are described. The scaffolds are available in multigram quantities and have been designed for conjugation to various natural products such as carbohydrates and peptides. Th
