Multinuclear Sandwich‐type Complexes of Deprotonated β‐Cyclodextrin and Copper(<scp>II</scp>) Ions

Fuchs, Ralf; Habermann, Norbert; Klüfers, Peter

doi:10.1002/anie.199308521

Cited by 98 publications

(46 citation statements)

References 9 publications

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“…12 However, Wenz 13 reported the need of drastic chemical conditions such as high temperature, strong reducing agent (NaH) and absence of water for the deprotonation of β-cyclodextrin to occur, which is not the case in our work. On the other hand, in accordance with previous works the suppression of -OH vibrational modes in the 3000-3700 cm -1 region has been related to evidence of hostguest interaction as a consequence of complete water release upon inclusion.…”

Section: Resultsmentioning

confidence: 57%

Preparation of a ferrofluid using cyclodextrin and magnetite

Bocanegra-Diaz¹,

Mohallem²,

Sinisterra³

2003

J. Braz. Chem. Soc.

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Um ferrofluido foi obtido a partir da magnetita e da β-ciclodextrina, com a formação de um complexo de inclusão. A caracterização físico-química do complexo magnétita: β-ciclodextrina foi realizada através de espectroscopia de absorção na região do infravermelho com transformada de Fourier, difração de raios X, análise térmica (TG/DTA), microscopia eletrônica de transmissão (TEM) e espectroscopia de absorção atômica. É a primeira vez que se relata na literatura a formação de um complexo de inclusão de um óxido metálico em ciclodextrinas A ferrofluid has been obtained from magnetite and β-cyclodextrin, with the formation of an inclusion complex. The magnetite and β-cyclodextrin complex was characterized by FTIR spectroscopy, X-ray diffraction, thermal analysis (TG/DTA), transmission electron microscopy (TEM) and atomic absorption spectroscopy. As far as we know, this is the first report on an inclusion compound between a metal oxide and cyclodextrins. Keywords: ferrofluid, cyclodextrin, magnetite, magnetic materials, inclusion complex IntroductionFerrofluids are colloidal suspensions composed of single-domain magnetic nanoparticles dispersed in appropriate solvents (polar or non polar).1 Since their discovery in 1965 by Papell, 2 ferrofluids have raised a growing interest in the scientific and industrial communities due to their physical properties and applications. Ferrofluids can be applied to immunoassay, cell separation, contrast agents for ultrasound and magnetic resonance imaging (MRI), magnetic inks, biosensors, magnetic microactuactors, seals, bearing dampers and lubricants, etc. 3These specialized applications of ferrofluids impose strict requirements on their characteristics, such as chemical composition, size distribution uniformity, crystal structure, stability of magnetic properties, surface structure, adsorption properties, solubility and low toxicity. Many of these properties depend decisively on particle size, shape, composition and structure, and therefore rigorous control of the synthesis of ferrofluids is necessary. 5Cyclodextrins are water-soluble oligosaccharides composed of at least six (1-4) linked α-D-glucosyl residues which have the shape of a hollow, truncated cone, capable of forming inclusion complexes with a variety of guest molecules in the solid state, as well as in solution, with sizes compatible with the dimensions of the cavity. 7Cyclodextrins are used as surfactants and size controllers of different kind of materials. 6In the present work, we describe the preparation and characterization of a ferrofluid using β-cyclodextrin to stabilize magnetite nanoparticles in colloidal suspension. In this system, β-cyclodextrin may also act as a size selector. ExperimentalAnalytical grade chemicals and deionized water were used throughout. Synthesis of magnetite Preparation of the magnetic fluidThe preparation of the magnetic fluid was carried out by mixing 2.8 mg of β-cyclodextrin and 8.0 mL of NH 4 OH (8.5 mol L -1 ) dissolved in 15.0 mL of deionized water under continuous and vigorous st...

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Section: Resultsmentioning

confidence: 57%

Preparation of a ferrofluid using cyclodextrin and magnetite

Bocanegra-Diaz¹,

Mohallem²,

Sinisterra³

2003

J. Braz. Chem. Soc.

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“…Driven partly by the reaction of copper with cyclodextrin [115], in addition to the potential formation of metal-organic polyhedra, copper(II) nitrate and gallium(III) nitrate were reacted with various pyrogallol [4]arenes. The results of these combinations were remarkable and led to an expansion in the size of nano-metre scale metal-organic capsules.…”

Section: Metal-organic Pyrogallol[4]arene Nano-capsules; Structural Amentioning

confidence: 99%

Metallo-supramolecular capsules

Dalgarno

Power

Atwood

2008

Coordination Chemistry Reviews

534

216

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“…1) [2]. The hydrophobic cavity of CDs renders them inclusion capacity with a variety of compounds ranging from small molecules [11], ions [12], proteins [13], and oligonucleotides [14]. The biomedical applications of CDs are extremely attractive due to their low toxicity and low immunogenicity [15].…”

Section: Introductionmentioning

confidence: 99%

Cyclodextrin-based supramolecular systems for drug delivery: Recent progress and future perspective

Zhang

Peter

2013

Advanced Drug Delivery Reviews

733

596

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The excellent biocompatibility and unique inclusion capability as well as powerful functionalization capacity of cyclodextrins and their derivatives make them especially attractive for engineering novel functional materials for biomedical applications. There has been increasing interest recently to fabricate supramolecular systems for drug and gene delivery based on cyclodextrin materials. This review focuses on state of the art and recent advances in the construction of cyclodextrin-based assemblies and their applications for controlled drug delivery. First, we introduce cyclodextrin materials utilized for self-assembly. The fabrication technologies of supramolecular systems including nanoplatforms and hydrogels as well as their applications in nanomedicine and pharmaceutical sciences are then highlighted. At the end, the future directions of this field are discussed.

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Multinuclear Sandwich‐type Complexes of Deprotonated β‐Cyclodextrin and Copper(II) Ions

Cited by 98 publications

References 9 publications

Preparation of a ferrofluid using cyclodextrin and magnetite

Preparation of a ferrofluid using cyclodextrin and magnetite

Metallo-supramolecular capsules

Cyclodextrin-based supramolecular systems for drug delivery: Recent progress and future perspective

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