Molecular recognition of pertechnetate and perrhenate

Katayev, Evgeny A.; Kolesnikov, G. V.; Sessler, Jonathan L.

doi:10.1039/b806468g

Cited by 174 publications

(148 citation statements)

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“…Synthesis In the crystal lattice of 1, two arms of two tricopper ions are connected to one another through a Cu(µ-Cl) 2 Cu quadrilateral, at a Cu···Cu separation of 3.432 Å ( Figure 2B). The bridging of the two Cl -ions is unsymmetrical.…”

Section: Resultsmentioning

confidence: 99%

“…Crystallographic studies of 1 revealed that the three symmetry-related arms each coordinate a {Cu II Cl} unit, and two molecules of 1 are connected to one another through a Cu(µ-Cl) 2 Cu bridge, extending the molecular structure to form a two-dimensional layer.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8] Because anions regulate a variety of physiological processes, they are potential toxins. As examples, perchlorate ion can adversely affect human health by interfering with iodide uptake into the thyroid, [9][10][11] and chromate (CrO 4 2-) is toxic, mutagenic, and a human carcinogen.…”

Section: Introductionmentioning

confidence: 99%

“…The binding constants of anions in these systems are small, and this problem is especially troubling for the binding of pertechnetate, which is relatively large, of low charge density, and has a small enthalpy of complexation. 2 As a consequence, it has proved difficult to prepare receptors for 25 As a result, the tridentate bridging tetraoxoanion is immobilized by the trinuclear metal complex via strong covalent bonds.…”

Section: Introductionmentioning

confidence: 99%

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Immobilization, Trapping, and Anion Exchange of Perrhenate Ion Using Copper-Based Tripodal Complexes

2011

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Abstract:We describe a multidentate tripodal ligand in which three pendant arms carrying di(2-picolyl)amine units are linked to the ortho-positions of a tris (o-xylyl) scaffold, providing N(CH 2 -o-C 6 H 4 -CH 2 N(CH 2 py) 2 ) 3 (L). Reaction of L with CuCl 2 in the presence of hexafluorophosphate anion afforded blue cubes of [(CuCl) 3 L](PF 6 ) 3 ⋅5H 2 O (1). Crystallographic studies of 1 revealed that the three symmetry-related arms each coordinate a {Cu II Cl} unit, and two molecules of 1 are connected to one another through a Cu(µ-Cl) 2 Cu bridge, extending the molecular structure to form a two-dimensional layer.These 2-D layers pack in an ABCABC… fashion with PF 6 -anions located in between.Reaction of 1 with a stoichiometric amount of perrhenate ion afforded blue plates ofCompound 2 has the same lattice structure of 1, but the tricopper unit backbone now traps one ReO 4 -anion through Coulombic interactions.In addition, three molecules of 2 are bridged by a perrhenate ion forming a Cu 3 (µ 3 -ReO 4 )cluster to give a different 2-D structure, displaying a rare tridentate bridging ReO 4 -mode.Thus in addition to classic perrhenate trapping through weak Coulombic interactions, 2 represents an exceptional example in which the ReO 4 -anion is immobilized in an extended framework through tight covalent interactions. The interlamellar PF 6 -anions in 1 can be exchanged with other anions including perrhenate, perchlorate, or periodate. The structural similarity between perrhenate and pertechnetate makes these materials of potential interest for pertechnetate trapping.3

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Immobilization, Trapping, and Anion Exchange of Perrhenate Ion Using Copper-Based Tripodal Complexes

2011

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“…Email: yikeda@nr.titech. ac.jp extractants have been reported to act as a poor ligand for ReO 4 − [23][24][25]. Recently, the novel extractants, 2,2 -(methylimino)bis(N,N -dialkylacetamide) (MIDRA) and 2,2 -(iminium)bis(N,N -dialkylacetamide) (IDRA), have been developed [26].…”

Section: Introductionmentioning

confidence: 99%

Syntheses and crystal structures of Eu(III) and Sm(III) perrhenate complexes with 2,2′-(imino)bis(N,N′-diethylacetamide)

Ali

Kawasaki

Suzuki

et al. 2014

Journal of Nuclear Science and Technology

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Schiff Base and Reduced Schiff Base Ligands

Sreenivasulu

2012

Supramolecular Chemistry

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Supramolecular chemistry of Schiff base ligands and their reduced homologues is rapidly growing and gaining increased attention due to their convenient and straightforward synthetic methods and a wide range of complexation modes with almost all types of metal ions. In fact, the phenomenon of molecular recognition, self‐organization and self‐assembly, and host–guest chemistry through covalent and noncovalent interactions is pivotal to the understanding and development of supramolecular chemistry. In this direction, several forms of acyclic and macrocyclic Schiff bases and their reduced forms are employed to gain more insights and correctly ascertain the effect of different donor atoms, their relative position, the number and size of the chelating rings formed, the flexibility, and the geometry around the coordinating moiety on the molecular recognition process and selective binding of cations, anions, and/or neutral species. In this connection, this chapter deals with the supramolecular and molecular recognition properties and interesting host–guest complexes and metalla–supramolecular network structures derived from several acyclic and cyclic Schiff bases and reduced Schiff base ligands. Various solid‐state metalla‐supramolecular network structures are delineated ranging from hydrogen‐bonded linear polymers and helical coordination polymers, and 2D sheets to 3D network architectures constructed via N H⋯O, C O⋯H O solvent , O H⋯O, N H⋯O C, hydrogen bonds and C O⋯π, C H⋯π, and π–π stacking interactions. This review gives an account of the observed structural diversity in relation to the role of different donors and acceptors, aqua ligands and solvents, nature of the ligands and metal ions, and the coordination geometry around the metal ions.

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Molecular recognition of pertechnetate and perrhenate

Cited by 174 publications

References 58 publications

Immobilization, Trapping, and Anion Exchange of Perrhenate Ion Using Copper-Based Tripodal Complexes

Immobilization, Trapping, and Anion Exchange of Perrhenate Ion Using Copper-Based Tripodal Complexes

Syntheses and crystal structures of Eu(III) and Sm(III) perrhenate complexes with 2,2′-(imino)bis(N,N′-diethylacetamide)

Schiff Base and Reduced Schiff Base Ligands

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