53408-96-1Relevant articles and documents
Ungaro et al.
, p. 5198 (1976)
Highly preorganized bis(benzocrown ether)s for the binding of metal ions
Jeong, Kyu-Sung,Pyun, Seung Yup
, p. 7041 - 7044 (1994)
Several bis(crown ethers)s consisting of benzo-12-crown-4, benzo-15-crown-5, and benzo-18-crown-6, were prepared and their complexation properties with Na+ and K+ were determined by the liquid-liquid extraction method. The remarkable 'biscrown effect' was observed in the extractions of both Na+ and K+ using bis(benzo-12-crown-4) and bis(benzo-15-crown-5). Unsymmetrical bis(crown ether)s also exhibit much higher extractabilities of both Na+ and K+ than the corresponding mono(benzocrown ether)s.
Light-Driven Molecular Motors Boost the Selective Transport of Alkali Metal Ions through Phospholipid Bilayers
Barboiu, Mihail,Gavat, Odile,Giuseppone, Nicolas,Huang, Li-Bo,Moulin, Emilie,Wang, Wen-Zhi,Zheng, Shao-Ping
supporting information, p. 15653 - 15660 (2021/10/01)
A hydrophobic light-driven rotary motor is functionalized with two 18-crown-6 macrocycles and incorporated into phospholipid bilayers. In the presence of this molecular construct, fluorescence assays and patch clamp experiments show the formation of selective alkali ion channels through the membrane. Further, they reveal a strongly accelerated ion transport mechanism under light irradiation. This increase of the fractional ion transport activity (up to 400%) is attributed to the out-of-equilibrium actuation dynamics of the light-driven rotary motors, which help to overcome the activation energy necessary to achieve translocation of alkali ions between macrocycles along the artificial channels.
Supramolecular assembly of isocyanorhodium(i) complexes: An interplay of rhodium(i)···rhodium(i) interactions, hydrophobic-hydrophobic interactions, and host-guest chemistry
Chan, Alan Kwun-Wa,Wong, Keith Man-Chung,Yam, Vivian Wing-Wah
, p. 6920 - 6931 (2015/06/16)
A series of tetrakis(isocyano)rhodium(I) complexes with different chain lengths of alkyl substituents has been found to exhibit a strong tendency toward solution state aggregation upon altering the concentration, temperature and solvent composition. Temperature- and solvent-dependent UV-vis absorption studies have been performed, and the data have been analyzed using the aggregation model to elucidate the growth mechanism. The aggregation is found to involve extensive Rh(I)···Rh(I) interactions that are synergistically assisted by hydrophobic-hydrophobic interactions to give a rainbow array of solution aggregate colors. It is noted that the presence of three long alkyl substituents is crucial for the observed cooperativity in the aggregation. Molecular assemblies in the form of nanoplates and nanovesicles have been observed in the hexane-dichloromethane solvent mixtures, arising from the different formation mechanisms based on the alkyl chain length of the complexes. Benzo-15-crown-5 moieties have been incorporated for selective potassium ion binding to induce dimer formation and drastic color changes, rendering the system as potential colorimetric and luminescent cation sensors and as building blocks for ion-controlled supramolecular assembly.
Synthesis, X-ray diffraction and optical spectral study of benzo-18-crown-6 containing monoazo dyes
Deshinukh,Alasundkar,Salunkhc,Salunkhe,Sankpal,Patil,Anbhule
experimental part, p. 737 - 740 (2009/12/24)
The 4-nilrobenzo-18-crown-6, 2 have been reduced by the Fe/HCI to give 4'-aminobenzo-l8-crown-6, 3. This is diazotized and coupled with different phenols to give the corresponding azo- dyes. X-ray diffraction as well as UV-Vis study of 4' (P naphthol azo benzo) 18-crown-6, 4a dye have been reported.
