Synthese und Eigenschaften eines Celluloseaustauschers mit Brenzcatechindisulfons�ure-(3,5) (Tiron) als funktioneller Gruppe

Burba, P.; Griesbach, M.; Lieser, Κ. H.

doi:10.1007/bf00432785

Cited by 14 publications

(4 citation statements)

References 5 publications

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“…Synthetic catechol‐based stationary supports have been explored for the scavenging of heavy metals from aqueous samples. The sequestering capacity of these substrates was first tested on Tiron‐functionalized cellulose,422 and polystyrene,423 as well as 3,4‐dihydroxybenzyl‐substituted poly(styrene‐divinylbenzene, PS‐DVB),424 which showed affinity toward Fe III and Hg II , respectively. As far as ion exchange resins are concerned, true selectivity for Fe III in aqueous environments with regard to other trivalent ions–such as Al III and Cr III ‐ and divalent species, was achieved by Fish and co‐workers by applying a biomimetic approach, by which bipodal and tripodal, siderophore‐like catechol‐based pendant groups were used to functionalize a PS‐DVB resin 425, 426, 427.…”

Section: Siderophore‐like Materialsmentioning

confidence: 99%

Catechol‐Based Biomimetic Functional Materials

Saiz‐Poseu²,

et al. 2012

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Abstract.Catechols are found in nature taking part in a remarkably broad scope of biochemical processes and functions. Though not exclusively, such versatility may be traced back to several properties uniquely found together in the o -dihydroxyaryl chemical function; namely, its ability to establish reversible equilibria at moderate redox potentials and pHs and to irreversibly cross-link through complex oxidation mechanisms; its excellent chelating properties, greatly exemplifi ed by, but by no means exclusive, to the binding of Fe 3 + ; and the diverse modes of interaction of the vicinal hydroxyl groups with all kinds of surfaces of remarkably different chemical and physical nature. Thanks to this diversity, catechols can be found either as simple molecular systems, forming part of supramolacular structures, coordinated to different metal ions or as macromolecules mostly arising from polymerization mechanisms through covalent bonds. Such versatility has allowed catechols to participate in several natural processes and functions that range from the adhesive properties of marine organisms to the storage of some transition metal ions. As a result of such an astonishing range of functionalities, catechol-based systems have in recent years been subject to intense research, aimed at mimicking these natural systems in order to develop new functional materials and coatings. A comprehensive review of these studies is discussed in this paper.

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Section: Siderophore‐like Materialsmentioning

confidence: 99%

Catechol‐Based Biomimetic Functional Materials

Saiz‐Poseu²,

et al. 2012

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“…44 However, Tiron functionalized resins have never been extensively explored for the preconcentration of metal ions. There are only brief preliminary reports 45,46 on the metalsorption behaviour of Tiron functionalized cellulose, polystyrene and polystyrene-divinylbenzene (3%) copolymer. It was therefore thought worthwhile to synthesize a chelating resin by covalently linking Tiron with Amberlite XAD-2 and to investigate its enrichment behaviour for divalent Cu, Cd, Co, Ni, Pb, Zn and Mn, and trivalent Fe and UO 2 II .…”

Section: Introductionmentioning

confidence: 99%

Metal ion enrichment with Amberlite XAD-2 functionalized with Tiron: analytical applications

Kumar

Rathore

Singh

2000

Analyst

154

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“…While Ca 2+ forms stronger Tiron complexes in solution, steric reasons are stressed for the stronger affinity of Sr 2+ towards the immobilized Tiron. 104 The use of immobilized chromotropic acid 105 as a preconcentration medium brought up a couple of problems that are fairly symptomatic for most of the modified celluloses prepared to date. For a rather nonselective functional group like chromotropic acid, an exchange capacity of 0.15 meq/ g is far below the capacity that would be required for an analytically useful material.…”

Section: Cqmentioning

confidence: 99%

“…Yet, only 0.19 meq/g capacity is obtained under the recommended reaction conditions. Tiron (l,2-dihydroxybenzene-3,5-disulfonic acid) was diazo coupled to cellulose yielding a product with 0.2 meq/g exchange capacity: 104 This material shows complete equilibration with Fe 3t ions within 2 min and affinity towards alkaline earth ions as well as transition metal ions. While transition metal ions coordinate preferably with the two phenolic OH groups, alkaline earth ions react with the sulfonic acid moieties in the meta position.…”

Section: Cqmentioning

confidence: 99%