935510-49-9

Upstream product

• 77892-62-7 2-Nitro-1,4-bis-octyloxy-benzene 
• 77892-63-8 2,5-Dioctyloxyanilin 
• 1263321-06-7 C₂₄H₃₉F₃N₂O₃ 
• 1263321-03-4 C₂₄H₃₇F₃N₂O₅ 
• 1263321-01-2 C₂₄H₃₈F₃NO₃ 
• 123-31-9 hydroquinone 
• 67399-94-4 1,4-bis(octyloxy)benzene 
• 111-83-1 1-bromo-octane 
• 935510-48-8 C₂₂H₃₆O₂NO₂NO₂ 

Downstream Products

• 935510-50-2 C₅₃H₈₄N₄O₇ 

Relevant academic research and scientific papers

Hydrogen bonded arylamide-linked cholesteryl dimesogenic liquid crystals: A study of the length and side chain effects

Dimesogenic compounds 1a-c, 2a-i, and 3, that are composed of a hydrogen bonding-induced straight arylamide spacer and two appended cholesterol groups, have been designed and synthesized. The backbones of the rigid spacers of 1a-c, 2a-i, and 3 contain one, three, and five benzene units, which bear two, six, and ten alkoxyl (methoxyl, n-octoxyl, or n-dodecoxyl) groups, respectively. The thermal and optical properties of the compounds are investigated by using the differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and powder X-ray diffraction (PXRD) analysis. It is revealed that 1a-c exhibit one or two liquid crystalline (LC) phases, 2a-i exhibit no, one or two LC phases, while 3 exhibits one LC phase in a wide temperature range. Generally, the more and longer alkoxyl chains facilitate the formation of the LC phases at low temperature. Notably, compound 2g, which bears two methoxyl and four dodecoxyl groups, displays a blue-red color change during both the heating and cooling cycle. The result illustrates that dimesogens with large rigid spacers can exhibit different LC phases when long aliphatic chains are appended to balance the strong stacking of the rigid backbones.

Dynamic [2]catenanes based on a hydrogen bonding-mediated bis-zinc porphyrin foldamer tweezer: A case study

(Chemical Equation Presented) This paper describes the self-assembly of a new class of three-component dynamic [2]catenanes, which are driven or stabilized by intramolecular hydrogen bonding, coordination, and electrostatic interaction. One of the component molecules 2, consisting of an aromatic oligoamide spacer and two peripheral zinc porphyrin units, was designed to adopt a folded preorganized conformation, which is stabilized by consecutive intramolecular three-centered hydrogen bonds. Component molecule 3 is a linear secondary ammonium bearing two peripheral pyridine units, which was designed to form a 1:1 complex with 24-crown-8 (5). The 1H NMR and UV-vis experiments in CDCl3-CD3CN (4:1 v/v) revealed that, due to the preorganized U-shaped feature, 2 could efficiently bind 3 through the cooperative zinc-pyridine coordination to generate highly stable 1:1 complex 2·3. Adding 5 to the 1:1 solution of 2 and 3 led to the formation of dynamic three-component [2]catenane 2·3·5 as a result of the threading of 3 through 5. 1H NMR studies indicated that in the 1:1:1 solution (3 mM) [2]catenane 2·3·5 was generated in 55% yield at 25°C. The yield was increased with the reduction of the temperature and [2]catenane could be produced quantitatively in a 1:1:2 solution ([2] = 3 mM) at -13°C. Replacing 3 with 1,2-bis(4,4′-bipyridinium)ethane (4) in the three-component solution could also give rise to similar dynamic [2]-catenane 2·4·5 albeit in slightly lower yield.