Ionic conductivities and diffusion coefficients of alkyl substituted sulfonated resorcinarenes in aqueous solutions

Interactions of Sodium Salicylate with β-Cyclodextrin and an Anionic Resorcin[4]arene: Mutual Diffusion Coefficients and Computational Study

“…Similarity, D 22 values at the limiting situations of X 1 = 0 and X 1 = 1 are the binary mutual diffusion coefficient of aqueous Na 4 EtRA ( D 22 = 0.711 × 10 −9 m 2 s −1 ) and the tracer diffusion coefficient of Na 4 EtRA in aqueous NaSal solutions ( D 22 = 0.499 × 10 −9 m 2 s −1 ), respectively. In this case, the excellent agreement between the first limiting value and the value of the binary diffusion coefficient obtained for aqueous solutions of Na 4 ETRA at the same concentration (that is, differences around 1.5%) can also be verified [ 13 , 14 ].…”

“…In the present work, the limiting ionic conductivity values for Na + , Sal − , and EtRA 4− ions and of the respective diffusion coefficients are = 50.1 × 10 −4 S m 2 s −1 [ 17 ], = 34.5 × 10 −4 S m 2 s −1 [ 18 ] and = 229.3 × 10 −4 S m 2 s −1 [ 14 ], and = 1.334 × 10 −9 m 2 s −1 , = 0.918 × 10 −9 m 2 s −1 , and = 0.384 × 10 −9 m 2 s −1 .…”

A Review of the Application of Resorcinarenes and SBA-15 in Drug Delivery

“…On the other hand, sulfonated resorcin [4]arenes have been synthesized and studies on their mutual diffusion coefficients and molar ionic conductivities in aqueous solution at 298.15 K, at concentrations lower than 0.010 mol dm −3 have been reported. The results are discussed in terms of interactions in solution, the effect of the length of the chain located at the lower rim of the resorcin [4]arene, and the hydrodynamic radii as compared between the two techniques [36]. The diffusion coefficients of bovine serum albumin in water and in the presence of sulfonated resorcin [4]arenes were also evaluated; the values obtained from the diffusion coefficients were analyzed in terms of interactions and as the presence of resorcin [4]arene favors the interaction between protein and water; the salting-in effect was also evaluated [37].…”

Host–Guest Interactions of Sodiumsulfonatomethyleneresorcinarene and Quaternary Ammonium Halides: An Experimental–Computational Analysis of the Guest Inclusion Properties

“…This amphiphilic behavior of tetrasulfonate derivatives (SR) has created new avenues for harnessing resorcinarenes in biological applications. 30,31 The representative examples of SRs studied in the literature include, methylenesulfonate groups appended at the upper-rim C2positions (Type-1), [30][31][32][33][34][35][36][37][38][39][40][41] sulfonate and phenolic oxygens linked by methylene chains (Type-2), 42 and alkylated sulfonate derivatives at the lower-rim (Type-3). [43][44][45] The nature of their binding to neutral, singly and doubly charged aliphatic/N-heterocycle cationic guests has been studied in solution to understand the sulfonate groups intricate role in H-G systems.…”

“…Sulfonate substitution makes the resorcinarenes behave as amphiphiles. This amphiphilic behavior of tetrasulfonate derivatives (SR) has created new avenues for harnessing resorcinarenes in biological applications. , The representative examples of SRs studied in the literature include methylenesulfonate groups appended at the upper-rim C2-positions (Type-1), − sulfonate and phenolic oxygens linked by methylene chains (Type-2), and alkylated sulfonate derivatives at the lower-rim (Type-3). − The nature of their binding to neutral, singly, and doubly charged aliphatic/N-heterocycle cationic guests has been studied in solution to understand the sulfonate groups’ intricate role in H-G systems. For example, Liu et al have shown that the H-G complexation between viologen type cationic guests and Type-2 receptor in water results from charge transfer interaction between electron-rich host and electron-deficient guest aromatic rings .…”