scholarly journals Coordination Cages Selectively Transport Molecular Cargoes Across Liquid Membranes

2021 ◽  
Author(s):  
Bao-Nguyen T. Nguyen ◽  
John D. Thoburn ◽  
Angela B. Grommet ◽  
Duncan J. Howe ◽  
Tanya K. Ronson ◽  
...  
Keyword(s):  
Liquid Membranes ◽  
Coordination Cages

scholarly journals Coordination Cages Transport Molecular Cargoes Across Liquid Membranes

2021 ◽  
Author(s):  
Bao-Nguyen Nguyen ◽  
John D. Thoburn ◽  
Angela Grommet ◽  
Duncan Howe ◽  
Tanya K. Ronson ◽  
...  
Keyword(s):  
Chemical Separation ◽  
Liquid Membranes ◽  
Ambient Conditions ◽  
Guest Molecules ◽  
Technological Basis ◽  
Catch And Release ◽  
Stage Separation ◽  
Guest Binding ◽  
Coordination Cages ◽  
Single Compound

<p><b>Chemical purifications are critical processes across many industries, requiring 10 - 15% of humanity’s global energy budget</b><sup>1,2</sup><b>. Coordination cages are able to catch and release guest molecules based upon their size and shape</b><sup>3,4</sup><b>, providing a new technological basis for achieving chemical separation. Here we show that aqueous solutions of Fe<sup>II</sup><sub>4</sub>L<sub>6</sub> and Co<sup>II</sup><sub>4</sub>L<sub>4</sub> cages can be used as liquid membranes. Selective transport of complex hydrocarbons across these membranes enabled the separation of target compounds from mixtures under ambient conditions. The kinetics of cage-mediated cargo transport are governed by guest binding affinity. Using sequential transport across two consecutive membranes, target compounds were isolated from a mixture in a size-selective fashion. The selectivities of both cages thus enabled a two-stage separation process to isolate a single compound from a mixture of physicochemically similar molecules.</b></p>

scholarly journals Coordination Cages Transport Molecular Cargoes Across Liquid Membranes

2021 ◽  
Author(s):  
Bao-Nguyen Nguyen ◽  
John D. Thoburn ◽  
Angela Grommet ◽  
Duncan Howe ◽  
Tanya K. Ronson ◽  
...  
Keyword(s):  
Chemical Separation ◽  
Liquid Membranes ◽  
Ambient Conditions ◽  
Guest Molecules ◽  
Technological Basis ◽  
Catch And Release ◽  
Stage Separation ◽  
Guest Binding ◽  
Coordination Cages ◽  
Single Compound

<p><b>Chemical purifications are critical processes across many industries, requiring 10 - 15% of humanity’s global energy budget</b><sup>1,2</sup><b>. Coordination cages are able to catch and release guest molecules based upon their size and shape</b><sup>3,4</sup><b>, providing a new technological basis for achieving chemical separation. Here we show that aqueous solutions of Fe<sup>II</sup><sub>4</sub>L<sub>6</sub> and Co<sup>II</sup><sub>4</sub>L<sub>4</sub> cages can be used as liquid membranes. Selective transport of complex hydrocarbons across these membranes enabled the separation of target compounds from mixtures under ambient conditions. The kinetics of cage-mediated cargo transport are governed by guest binding affinity. Using sequential transport across two consecutive membranes, target compounds were isolated from a mixture in a size-selective fashion. The selectivities of both cages thus enabled a two-stage separation process to isolate a single compound from a mixture of physicochemically similar molecules.</b></p>

Synthesis of Calcium Carbonate Micro Particles using Emulsion Membrane Process Applied for Drug Release Studies

2017 ◽  
Vol 68 (10) ◽  
pp. 2320-2324
Author(s):  
Mariana Mateescu ◽  
Sanda Maria Doncea ◽  
Irina Chican ◽  
Cristina Lavinia Nistor ◽  
Ioneta Codrina Bujanca
Keyword(s):  
Light Scattering ◽  
Calcium Carbonate ◽  
Dynamic Light Scattering ◽  
Liquid Membranes ◽  
Membrane Process ◽  
Emulsion Method ◽  
Micro Particles ◽  
Release Studies ◽  
Emulsion Liquid Membranes ◽  
Span 80

The aim of this work is the synthesis of calcium carbonate (CaCO3) nano and microparticles and their application as biomaterials (vehicles) for the sustained release of doxycycline. CaCO3 micro particles were synthesized by water-in oil (W/O) emulsion method using emulsion liquid membranes with bis (2-ethylhexyl) phosphate (D2EHPA) as carrier, Span 80 as surfactant, and toluene and kerosene as organic solvents. The aqueous phases contained 1 M CaCl2, and 1 M Na2CO3, respectively. The Dynamic Light Scattering (DLS) data showed CaCO3 particles with sizes ranging from around 100 nm to 3500 nm. The CaCO3 particles with the average diameters around 600 nm attained an adsorbtion of doxycycline of maximum 97.9%, and a slow and steady release with a cumulative value of approximative 50% after ten days.

scholarly journals Investigating the Proton and Ion Transfer Properties of Supported Ionic Liquid Membranes Prepared for Bioelectrochemical Applications Using Hydrophobic Imidazolium-Type Ionic Liquids

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 359
Author(s):  
László Koók ◽  
Piroska Lajtai-Szabó ◽  
Péter Bakonyi ◽  
Katalin Bélafi-Bakó ◽  
Nándor Nemestóthy
Keyword(s):  
Mass Transfer ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Microbial Fuel Cells ◽  
Transport Numbers ◽  
Liquid Membranes ◽  
Ion Transfer ◽  
Supported Ionic Liquid ◽  
Supported Ionic Liquid Membranes ◽  
Transfer Properties

Hydrophobic ionic liquids (IL) may offer a special electrolyte in the form of supported ionic liquid membranes (SILM) for microbial fuel cells (MFC) due to their advantageous mass transfer characteristics. In this work, the proton and ion transfer properties of SILMs made with IL containing imidazolium cation and [PF6]− and [NTf2]− anions were studied and compared to Nafion. It resulted that both ILs show better proton mass transfer and diffusion coefficient than Nafion. The data implied the presence of water microclusters permeating through [hmim][PF6]-SILM to assist the proton transfer. This mechanism could not be assumed in the case of [NTf2]− containing IL. Ion transport numbers of K+, Na+, and H+ showed that the IL with [PF6]− anion could be beneficial in terms of reducing ion transfer losses in MFCs. Moreover, the conductivity of [bmim][PF6]-SILM at low electrolyte concentration (such as in MFCs) was comparable to Nafion.

Cavitand-Based Nanoscale Coordination Cages

2004 ◽  
Vol 126 (21) ◽  
pp. 6516-6517 ◽  
Author(s):  
Roberta Pinalli ◽  
Veronica Cristini ◽  
Valerio Sottili ◽  
Silvano Geremia ◽  
Mara Campagnolo ◽  
...  
Keyword(s):  
Coordination Cages

Liquid membranes for extraction

2014 ◽  
Vol 54 (8) ◽  
pp. 581-594 ◽  
Author(s):  
E. V. Yurtov ◽  
M. Yu. Koroleva
Keyword(s):  
Liquid Membranes

scholarly journals Polymeric Pseudo-Liquid Membranes from Poly(N-oleylacrylamide)

Membranes ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 210-226 ◽  
Author(s):  
Hiroko Shiono ◽  
Masakazu Yoshikawa
Keyword(s):  
Liquid Membranes
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