Anion-capped benzodithia-18-crown-6 styryl dye monolayers

Multifunctional membranes based on photosensitive crown-ether derivatives with advanced properties

“…The development of monolayers of these PCEDs mixed with surface-active monomers or polymers yields nanosystems whose properties can be controlled as desired by varying the orientation and packing of molecules in the monolayers, as well as their photosensitivity and ion selectivity, and improving their stability and strength. That is confirmed by the results of the investigations of the monolayer properties of type-II PCEDs mixed with various surface-active monomers and polymers in the range from 1:10 to 10:1 formed on the surface of water and solutions of various salts [21,[23][24][25][26]. For monolayers of type-IIa or type-IIb PCEDs mixed in equimolar ratios with poly(16-di(metacryloyloxyhexadecanoyl)glicero-3-phosphoryl choline , no "deviations from additivity" are observed at 20 mN/m on the surface of water.…”

“…Researchers [23,24] synthesized a new amphiphilic butadienyl crown ether (BDCE) (Fig. 1c) with two sulfur atoms in the crownether ring structure of the molecule.…”

Membrane and Films Based on Novel Crown-Containing Dyes as Promising Chemosensoring Materials

“…The development of monolayers of these CCDs mixed with surface-active monomers or polymers yields nanosystems whose properties can be controlled as desired by varying the orientation and packing of molecules in the monolayers, as well as their photosensitivity and ion selectivity, and improving their stability and strength. That is confirmed by the results of investigations of the monolayer properties of type-II CCDs mixed with various surface-active monomers and polymers in the range of proportions from 1:10 to 10:1 formed on the surface of water and solutions of various salts [ 21 , 23 , 24 , 25 , 26 ]. For monolayers of type-IIa or type-IIb CCDs mixed in equimolar ratios with poly(16-di(metacryloyloxyhexadecanoyl)glicero-3-phosphoryl choline (16-MHPC), no “deviations from additivity” are observed at 20 mN/m on the surface of water.…”

“…Researchers at the Photochemistry Center of the Russian Academy of Sciences synthesized a new amphiphilic butadienyl crown ether (BDCE) (Figure 1c) with two sulfur atoms in the crown-ether ring-structure of the molecule [23,24]. BDCE was found to be capable of forming relatively stable monolayers on the surface of water (with a collapse pressure around 42 mN/m), as well as solutions of alkaline salts (π = 40–45 mN/m) and heavy metal salts (π = 23–40 mN/m), which in most cases is substantially higher than the collapse pressure for the monolayers of the dithio derivatives of the CCDs (π = 25.5–34.5 mN/m) studied by us earlier [19,20,21].…”

Mixed Monolayers of Alkylated Azacrown Ethers and Palmitic Acid at the Air−Water Surface

“…The Langmuir film formation of azacrown ethers continues to attract attention mostly due to the potential applications in chemical sensing, − molecular electronics, and mimicking biological systems . Möbius and Zaitsev extensively investigated the Langmuir monolayers of water-insoluble crown ether-based dyes. , They found that complexation of metal ions by the crown ether monolayer has a profound effect on the monolayer properties and can be correlated with the metal−crown ether complex formation abilities. Tschierske et al studied Langmuir monolayers of crown ether-appended rod-shaped amphiphiles and found that the surface pressure−area isotherms can be used to study molecular recognition of metal ions by these crown ethers .…”