ChemInform Abstract: Phosphate Anion Binding by Macrocyclic Dinucleating Ligands and Their Metal Complexes

ChemInform ◽  
2010 ◽  
Vol 31 (20) ◽  
pp. no-no
Author(s):  
Arthur E. Martell ◽  
Ramunas J. Motekaitis ◽  
Qin Lu ◽  
David A. Nation
Keyword(s):  
Metal Complexes ◽  
Anion Binding ◽  
Phosphate Anion ◽  
Dinucleating Ligands

Phosphate anion binding by macrocyclic dinucleating ligands and their metal complexes

Polyhedron ◽  
1999 ◽  
Vol 18 (25) ◽  
pp. 3203-3218 ◽  
Author(s):  
Arthur E. Martell ◽  
Ramunas J. Motekaitis ◽  
Qin Lu ◽  
David A. Nation
Keyword(s):  
Metal Complexes ◽  
Anion Binding ◽  
Phosphate Anion ◽  
Dinucleating Ligands

Conformational Control of a Pyrrole-Based Amide Pentamer by Dihydrogen Phosphate Anion Binding

Heterocycles ◽  
2019 ◽  
Vol 98 (4) ◽  
pp. 551
Author(s):  
Quan Gan ◽  
Guoping Li ◽  
Jiulong Li ◽  
Chaocao Lu ◽  
Bu Htan ◽  
...  
Keyword(s):  
Anion Binding ◽  
Dihydrogen Phosphate ◽  
Phosphate Anion ◽  
Conformational Control

Enhanced Anion Binding from Unusual Coordination Modes of Bis(thiourea) Ligands in Platinum Group Metal Complexes

2010 ◽  
Vol 16 (35) ◽  
pp. 10818-10831 ◽  
Author(s):  
M. Laura Soriano ◽  
Joseph T. Lenthall ◽  
Kirsty M. Anderson ◽  
Stephen J. Smith ◽  
Jonathan W. Steed
Keyword(s):  
Metal Complexes ◽  
Platinum Group Metal ◽  
Anion Binding ◽  
Coordination Modes ◽  
Group Metal ◽  
Platinum Group

N-confused porphyrins as new scaffolds for supramolecular architecture

2004 ◽  
Vol 08 (01) ◽  
pp. 67-75 ◽  
Author(s):  
Hiromitsu Maeda ◽  
Hiroyuki Furuta
Keyword(s):  
Hydrogen Bonding ◽  
Metal Complexes ◽  
Divalent Metal ◽  
Anion Binding ◽  
Supramolecular Architecture ◽  
Square Planar ◽  
Donor And Acceptor ◽  
Hydrogen Bonding Networks ◽  
In Cis ◽  
Divalent Metal Complexes

The peripheral nitrogen of N -confused porphyrins ( NCP ) can serve as a hydrogen bonding donor and acceptor, and a metal coordination site as well. NCP forms versatile dimers with the assistance of metal ions such as Pd II, Pt II, Zn II, Cd II, Hg II, Mn II and Fe II. The square-planar divalent metal complexes of C 6 F 5-substituted NCP with Cu II, Ni II and Pd II act as efficient anion binding receptors. The doubly N -confused porphyrins ( N 2 CP ), possessing both N and NH at the periphery, form self-assembled 1-D hydrogen bonding networks, whose orientations differ in cis (zigzag) and trans (straight) isomers.

Dinuclear cobalt(II) complexes with double phosphate ester bridges and tetradentate ligands having anisole or quinoline appendages

2017 ◽  
Vol 73 (6) ◽  
pp. 492-497 ◽  
Author(s):  
S. S. Anjana ◽  
Babu Varghese ◽  
Edamana Prasad
Keyword(s):  
Metal Complexes ◽  
Phosphate Esters ◽  
Phosphate Ester ◽  
Model Complexes ◽  
Dinucleating Ligands ◽  
Tetradentate Ligands ◽  
Aromatic Interactions ◽  
Double Phosphate ◽  
Distorted Octahedral ◽  
Diphenyl Phosphate

Phosphate esters provide a rigid and stable polymeric backbone in nucleic acids. Metal complexes with phosphate ester groups have been synthesized as structural and spectroscopic models of phosphate-containing enzymes. Dinucleating ligands are used extensively to synthesize model complexes since they provide the support required to stabilize such complexes. The crystal structures of two dinuclear CoII complexes, namely bis(μ-diphenyl phosphato-κ2 O:O′)bis({2-methoxy-N,N-bis[(pyridin-2-yl)methyl]aniline-κ4 N,N′,N′′,O}cobalt(II)) bis(perchlorate), [Co(C12H10O4P)2(C19H19N3O)2](ClO4)2, and bis(μ-diphenyl phosphato-κ2 O:O′)bis({N,N-bis[(pyridin-2-yl)methyl]quinolin-8-amine-κ4 N,N′,N′′,O}cobalt(II)) bis(perchlorate), [Co(C12H10O4P)2(C21H18N4)2](ClO4)2, with tetradentate 2-methoxy-N,N-bis[(pyridin-2-yl)methyl]aniline (L 1) and N,N-bis[(pyridin-2-yl)methyl]quinolin-8-amine (L 2) ligands are reported. The complexes have similar structures, with distorted octahedral geometries around the metal centres. Both are centrosymmetric (Z′ = 0.5), with the CoII centres doubly bridged by diphenyl phosphate ester groups. A number of aromatic–aromatic interactions are present and differ between the two complexes as the anisole group in L 1 is replaced by a quinoline group in L 2. A detailed study of these interactions is presented.

Zinc(II)-based fluorescent dyes: Luminescence modulation by phosphate anion binding

2014 ◽  
Vol 110 ◽  
pp. 169-192 ◽  
Author(s):  
Andrea Bencini ◽  
Francesco Bartoli ◽  
Claudia Caltagirone ◽  
Vito Lippolis
Keyword(s):  
Fluorescent Dyes ◽  
Anion Binding ◽  
Phosphate Anion

scholarly journals The role of the synergistic phosphate anion in iron transport by the periplasmic iron-binding protein from Haemophilus influenzae

2007 ◽  
Vol 403 (1) ◽  
pp. 43-48 ◽  
Author(s):  
Ali G. Khan ◽  
Stephen R. Shouldice ◽  
Leslie W. Tari ◽  
Anthony B. Schryvers
Keyword(s):  
Haemophilus Influenzae ◽  
Iron Transport ◽  
Binding Protein ◽  
Critical Role ◽  
Anion Binding ◽  
Iron Binding ◽  
Phosphate Anion ◽  
Intact Cells ◽  
Terminal Domain

The acquisition of iron from transferrin by Gram-negative bacterial pathogens is dependent on a periplasmic ferric-ion-binding protein, FbpA. FbpA shuttles iron from the outer membrane to an inner membrane transport complex. A bound phosphate anion completes the iron co-ordination shell of FbpA and kinetic studies demonstrate that the anion plays a critical role in iron binding and release in vitro. The present study was initiated to directly address the hypothesis that the synergistic anion is required for transport of iron in intact cells. A series of site-directed mutants in the anion-binding amino acids of the Haemophilus influenzae FbpA (Gln-58, Asn-175 and Asn-193) were prepared to provide proteins defective in binding of the phosphate anion. Crystal structures of various mutants have revealed that alteration of the C-terminal domain ligands (Asn-175 or Asn-193) but not the N-terminal domain ligand (Gln-58) abrogated binding of the phosphate anion. The mutant proteins were introduced into H. influenzae to evaluate their ability to mediate iron transport. All of the single site-directed mutants (Q58L, N175L and N193L) were capable of mediating iron acquisition from transferrin and from limiting concentrations of ferric citrate. The results suggest that the transport of iron by FbpA is not dependent on binding of phosphate in the synergistic anion-binding site.

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