Chemically Modified Cyclodextrins: An Attractive Class of Supramolecular Hosts for the Development of Aqueous Biphasic Catalytic Processes

Bricout, H.; Hapiot, F.; Ponchel, A.; Tilloy, S.; Monflier, Éric

doi:10.3390/su1040924

Cited by 54 publications

(26 citation statements)

References 117 publications

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“…9 CDs can form inclusion complexes by immersing one or more molecules into their cavity, that is, caging foreign molecules (guest). 9 CDs can form inclusion complexes by immersing one or more molecules into their cavity, that is, caging foreign molecules (guest).…”

Section: Introductionmentioning

confidence: 99%

Formulation of a Self‐Assembling Polymeric Network System for Enhanced Oil Recovery Applications

2014

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The chemical formulation and rheological properties of a novel self-assembling polymer (SAP) network system were investigated for potential application in enhanced oil recovery (EOR). The inclusion complexes formed by surfactant (S) and β-cyclodextrin (β-CD) can associate with hydrolyzed polyacrylamides (HPAM) in aqueous solution, and subsequently establish the SAP network, which exhibits advanced viscoelasticity at the optimum molar ratio (S:β-CD = 2:1). Furthermore, this system presents enhanced surface activity and superior mechanical and thermal stability, as well as tolerance to elevated brine salinity and hardness due to the network "interlocking effect". Sandpack flood tests suggest the excellent mobility control ability of this system during polymer flooding, and also a moderate permeability reduction capacity, which makes it more cost effective in oil fields than the currently used HPAM. Regarding EOR performance, this polymeric system (SAP) produced approximately 19% more incremental oil than the baseline HPAM under the same experimental conditions. C

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Section: Introductionmentioning

confidence: 99%

Formulation of a Self‐Assembling Polymeric Network System for Enhanced Oil Recovery Applications

2014

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“…Enzymatic degradation of starch by cyclodextrin-glycosyltransferase (CGT) produces cyclic oligomers (38). CDs are non-reducing, crystalline, water soluble, cyclic oligosaccharides composed of 5 or more anhydrous a-D-glucopyranoside units (AGU) (39) linked together by a a-1,4-bond (40). Six, seven or eight AGU are generally present in CDs and are known as a, b and g-CD, respectively.…”

Section: Cyclodextrin Based Nanospongesmentioning

confidence: 99%

Cyclodextrin based nanosponges for pharmaceutical use: A review

Tejashri¹,

Amrita²,

Darshana³

2013

Acta Pharmaceutica

197

100

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Nanosponges are a novel class of hyper-crosslinked polymer based colloidal structures consisting of solid nanoparticles with colloidal sizes and nanosized cavities. Well--known examples of nanosponges are titanium-based nanosponges (1), silicon nano- Nanosponges are a novel class of hyper-crosslinked polymer based colloidal structures consisting of solid nanoparticles with colloidal sizes and nanosized cavities. These nano-sized colloidal carriers have been recently developed and proposed for drug delivery, since their use can solubilize poorly water-soluble drugs and provide prolonged release as well as improve a drug's bioavailability by modifying the pharmacokinetic parameters of actives. Development of nanosponges as drug delivery systems, with special reference to cyclodextrin based nanosponges, is presented in this article. In the current review, attempts have been made to illustrate the features of cyclodextrin based nanosponges and their applications in pharmaceutical formulations. Special emphasis has been placed on discussing the methods of preparation, characterization techniques and applications of these novel drug delivery carriers for therapeutic purposes. Nanosponges can be referred to as solid porous particles having a capacity to load drugs and other actives into their nanocavity; they can be formulated as oral, parenteral, topical or inhalation dosage forms. Nanosponges offer high drug loading compared to other nanocarriers and are thus suitable for solving issues related to stability, solubility and delayed release of actives. Controlled release of the loaded actives and solubility enhancement of poorly water-soluble drugs are major advantages of nanosponge drug delivery systems.

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“…There are two very popular families of hosts, namely cyclodextrins (CDs) [31][32][33][34][35][36] and cucurbit[n]urils (CBns) [37][38][39], each having particular advantages. The interest of scientific community is justified, inter alia, by biocompatibility of CDs and outstanding affinity of CBs, particularly CB7, towards some cationic guests derived from ferrocene [40], bicyclo[2.2.2]octane [41], adamantane [41], or diamantane [42].…”

Section: Introductionmentioning

confidence: 99%

Adamantylated trisimidazolium-based tritopic guests and their binding properties towards cucurbit[7]uril and β-cyclodextrin

Kulkarni

Prucková

Rouchal

et al. 2015

J Incl Phenom Macrocycl Chem

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Two new homotritopic guests based on tris(benz)imidazolium salts with adamantane binding sites were prepared. NMR and calorimetric titration experiments revealed that each of the three sites independently binds bcyclodextrin (b-CD) or cucurbit[7]uril (CB7) units to form binary host-guest complexes with 1:3 stoichiometry. The association constants for the single binding site for b-CD and CB7 were determined using titration calorimetry and are in the order of 10 5 and 10 9-10 dm 3 mol -1 , respectively. In addition, both guests were able to form ternary systems with b-CD and CB7 in ratios of 1:1:2 and 1:2:1, respectively.

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Chemically Modified Cyclodextrins: An Attractive Class of Supramolecular Hosts for the Development of Aqueous Biphasic Catalytic Processes

Cited by 54 publications

References 117 publications

Formulation of a Self‐Assembling Polymeric Network System for Enhanced Oil Recovery Applications

Formulation of a Self‐Assembling Polymeric Network System for Enhanced Oil Recovery Applications

Cyclodextrin based nanosponges for pharmaceutical use: A review

Adamantylated trisimidazolium-based tritopic guests and their binding properties towards cucurbit[7]uril and β-cyclodextrin

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