443686-43-9Relevant academic research and scientific papers
Mechanical Properties of a Metal-Organic Framework formed by Covalent Cross-Linking of Metal-Organic Polyhedra
Lal, Garima,Derakhshandeh, Maziar,Akhtar, Farid,Spasyuk, Denis M.,Lin, Jian-Bin,Trifkovic, Milana,Shimizu, George K. H.
supporting information, p. 1045 - 1053 (2019/01/14)
Overcoming the brittleness of metal-organic frameworks (MOFs) is a challenge for industrial applications. To increase the mechanical strength, MOFs have been blended with polymers to form composites. However, this also brings challenges, such as integration and integrity of MOF in the composite, which can hamper the selectivity of gas separations. In this report, an "all MOF" material with mechanical flexibility has been prepared by covalent cross-linking of metal-organic polyhedra (MOPs). The ubiquitous Cu24 isophthalate MOP has been decorated with a long alkyl chain having terminal alkene functionalities so that MOPs can be cross-linked via olefin metathesis using Grubbs second generation catalyst. Different degrees of cross-linked MOP materials have been obtained by varying the amount of catalyst in the reaction. Rheology of these structures with varying number of cross-links was performed to assess the cross-link density and its homogeneity throughout the sample. The mechanical properties were further investigated by the nanoindentation method, which showed increasing hardness with higher cross-link density. Thus, this strategy of cross-linking MOPs with covalent flexible units allows us to create MOFs of increasing mechanical strength while retaining the MOP cavities.
Aromatic dicarboxylic acid ionic liquid, as well as preparation method and application thereof
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Paragraph 0038; 0040, (2019/04/06)
The invention provides an aromatic dicarboxylic acid ionic liquid, as well as a preparation method and application thereof. The ionic liquid has a structure as shown in a general formula (I), whereinR1, R2, R3 and R4 are independently and respectively selected from alkyl having carbon atom number of 1-18, and n is an arbitrary integer of 2-12. Due to the intense adsorption effect of two polar carboxyl (-COO-) and introduction of rigid benzene ring, the ionic liquid can form a firm and orderly physical adsorption protective film on the surface of a metal friction pair in the friction process and has excellent friction reduction and abrasion resistance. Furthermore, the aromatic dicarboxylic acid ionic liquid has relatively ideal thermal stability and the highest decomposition temperature of 205 DEG C.
Two-Dimensional versus Three-Dimensional Self-Assembly of a Series of 5-Alkoxyisophthalic Acids
Frederick, Esther,Cojal González, José D.,Rabe, Jürgen P.,Bernasek, Steven L.
, p. 10739 - 10747 (2018/09/06)
Physisorbed self-assembled monolayers (SAMs) have been suggested as potential models for three-dimensional (3D) crystallization. This work studies the effect of altering the chain length of 5-alkoxyisophthalic acid (CnISA) on self-assembled mor
All solution-processed red organic light-emitting diode based on a new thermally cross-linked heteroleptic Ir(iii) complex
Cho, Woosum,Reddy, Saripally Sudhaker,Kim, Junyoung,Cho, Young-Rae,Jin, Sung-Ho
supporting information, p. 11714 - 11721 (2018/11/23)
A novel cross-linkable red iridium(iii) complex and electron transport material were designed and synthesized for use in the fabrication of solution-processed phosphorescent organic light-emitting diodes (PHOLEDs). The newly cross-linkable red Ir(iii) complex was successfully thermal cross-linked with a cross-linkable host in the emitting layer (EML). After cross-linking, the EML was found not to be damaged by organic solvents. A maximum external quantum efficiency (EQE) of 4.64% (2.77 cd A-1) was achieved for deep-red PHOLEDs after rinsing, which was similar to the EQE of 4.59% (2.52 cd A-1) after rinsing the deep-red PHOLEDs with thermal cross-linking.
Amphiphile-like self assembly of metal organic polyhedra having both polar and non-polar groups
Lal, Garima,Lee, Shiron J.,Spasyuk, Denis M.,Shimizu, George K.H.
supporting information, p. 1722 - 1725 (2018/02/21)
Mixed linker metal-organic polyhedra (MOPs) with polar and non-polar groups on the same MOP have been synthesized. This yields two types of MOPs, one where the ligands are evenly and symmetrically distributed over each polyhedron, as confirmed crystallogr
Controllable self-assembly of amphiphilic macrocycles into closed-shell and open-shell vesicles, nanotubes, and fibers
Mitra, Atanu,Panda, Dillip K.,Corson, Lucas J.,Saha, Sourav
supporting information, p. 4601 - 4603 (2013/06/05)
Depending on functional groups, amphiphilic hexaamide macrocycles self-assemble into closed-shell and open-shell vesicles in polar solvents. In the presence of water, open-shell vesicles morph into closed-shell vesicles, whereas acidification of the mediu
Two novel quadruple hydrogen-bonding motifs: the formation of supramolecular polymers, vesicles, and organogels
Du, Ping,Wang, Gui-Tao,Zhao, Xin,Li, Guang-Yu,Jiang, Xi-Kui,Li, Zhan-Ting
supporting information; experimental part, p. 188 - 191 (2010/03/04)
Two new hydrazide-based quadruple hydrogen-bonding motifs are described. Dipodals based on these two motifs are revealed to form supramolecular polymers, which can further aggregate to form vesicles and/or organogels in hydrocarbons. The quadruple hydroge
Synthesis and anion-binding properties of new disulfonamide-based receptors
Mammoliti, Oscar,Allasia, Sara,Dixon, Sally,Kilburn, Jeremy D.
experimental part, p. 2184 - 2195 (2009/07/18)
The synthesis of disulfonamide receptor scaffolds for anion binding is reported. Acyclic receptors are found to tightly bind acetate in MeCN-d3 with dominant 1:1 stoichiometry, a smaller, sequential 1:2 (H+G) association is also found. Constrai
Noncovalent synthesis of shape-persistent cyclic hexamers from ditopic hydrazide-based supramolecular synthons and asymmetric induction of supramolecular chirality
Yang, Yong,Xue, Min,Xiang, Jun-Feng,Chen, Chuan-Feng
supporting information; body text, p. 12657 - 12663 (2010/01/30)
With properly encoded recognition sites and a well-defined algorithm for intermolecular and intramolecular interactions, the 120° spacer linked ditopic hydrazide-based supramolecular synthons were found to self-assemble into shape-persistent cyclic hexame
NEW ISOBENZOXAZINONES AND THEIR USE AS ULTRAVIOLET LIGHT ABSORBERS
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Page/Page column 9, (2010/02/15)
The present invention relates to new substituted isobenzoxazinones, in particular of formula (I) as given in claim 1, and their use as ultraviolet light absorbers, in particular for organic polymers.
