ChemInform Abstract: Metal Cation: Glucopyranoside Co‐Transport Through a Liquid Organic Membrane.

Abstract

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A supported liquid membrane (SLM) with resorcinarene for facilitated transport of methyl glycopyranosides: Parameters and mechanism relating to the transport

“…According to the results of Table 3, we find that the values of apparent diffusion coefficients obtained (about 10 −4 cm 2 s −1 ) for each studied methyl aldopyranoside are higher compared to literature values (about 10 −6 cm 2 s −1 ) [15,19,[35][36][37][38]. The same remark was made for alditols and sugars [12,23,39,40].…”

“…To explain this phenomenon, we suggested in the transport of alditols [23], that the diffusion process is perhaps accompanied by a convection movement, which would be responsible for accelerating the diffusion of complexes in the membrane. While the hypothesis of "fixed-site jumping" proposed by Smith et al in the transport of sugar through a plasticized membrane of triacetate cellulose [18][19][20][21][35][36][37][38][41][42][43] is another suggestion, more likely to clarify this point. This theory assumes that the substrate moves by jumping from site to site, inside the membrane.…”

Selective Transport of Ag(I) through a Polymer Inclusion Membrane Containing a Calix[4]pyrrole Derivative from Nitrate Aqueous Solutions

“…The K ass and D values obtained for transport across the PIM with KP were 1.80 and 5.19 × 10 −6 cm 2 ·s −1 , respectively. It could be concluded that the values of the apparent diffusion coefficient D were about 1 × 10 −6 for Ag(I) ion transport with different calixpyrrole ligands and were comparable to the literature values [ 41 , 42 ]. The same mechanism was proposed during the transport of sugars [ 43 , 44 ].…”