Chiral multidentate oxazoline ligands based on cyclophosphazene cores: synthesis, characterization and complexation studies

2014 ◽  
Vol 43 (37) ◽  
pp. 13899-13912 ◽  
Author(s):  
Dheeraj Kumar ◽  
Jatinder Singh ◽  
Anil J. Elias
Keyword(s):  
Complexation Studies ◽  
Oxazoline Ligands ◽  
Derivatives Of ◽  
Oxazoline Derivatives

Chiral oxazoline derivatives of cyclophosphazenes were prepared and their complexation and catalytic studies for the asymmetric rearrangement of trichloroacetimidates to trichloroacetamides have been performed.

Functionalized phosphorus derivatives of Salpen-like compounds: Synthesis and preliminary complexation studies

2006 ◽  
Vol 691 (7) ◽  
pp. 1333-1340 ◽  
Author(s):  
Alexandrine Maraval ◽  
Germinal Magro ◽  
Valérie Maraval ◽  
Laure Vendier ◽  
Anne-Marie Caminade ◽  
...  
Keyword(s):  
Complexation Studies ◽  
Derivatives Of

Complexation studies of 3-substituted β-diketones with selected d- and f-metal ions

2011 ◽  
Vol 65 (2) ◽  
Author(s):  
Grzegorz Pawlicki ◽  
Bartosz Staniszewski ◽  
Katarzyna Witt ◽  
Włodzimierz Urbaniak ◽  
Stefan Lis
Keyword(s):  
Metal Ions ◽  
Absorption Spectra ◽  
Lanthanide Ions ◽  
Computer Assisted ◽  
Hypersensitive Transition ◽  
Complexation Studies ◽  
Target Factor Analysis ◽  
Derivatives Of ◽  
Hypersensitive Transitions

AbstractResults of spectroscopic investigations related to complex compositions of 3-substituted derivatives of pentane-2,4-dione (β-diketonate) complexes with chosen d- and f-metal ions are presented. Ligands 3-allylacetylacetone (3all-acac) and 3-benzylacetylacetone (3ben-acac) were prepared and used for the complexation study with Cu(II), Co(II), Nd(III), and Ho(III) metal ions. Based on the absorption spectra of lanthanide ions in their hypersensitive transitions, with the use of computer assisted target factor analysis (CAT) and absorption spectra of the ligands with Cu(II) and Co(II), the verification of complex compositions and the determination of their stability constants were achieved. In case of Nd(III) and Ho(III) complexes with β-diketone ligands, absorption of their maxima were studied in the range of hypersensitive transitions 4 I 9/2 → 4 F 7/2 + 4 S 3/2 (λ max ∼ 734 nm and 748 nm) for Nd(III) and in the range of 435–465 nm, corresponding to the hypersensitive transition 5 G 6 → 5 I 8 (λ max ∼ 450 nm), for Ho(III).

Synthesis of Oligobipyridine Strands Bearing Nucleoside and Amino Acid Side Chains

1996 ◽  
Vol 49 (10) ◽  
pp. 1023 ◽  
Author(s):  
MM Harding ◽  
JM Lehn
Keyword(s):  
Amino Acid ◽  
Nucleic Acids ◽  
Organic Solvents ◽  
Metal Ion ◽  
Metal Ion Complexation ◽  
Biological Targets ◽  
Complexation Studies ◽  
Amide Derivatives ◽  
Amino Acid Side Chains ◽  
Derivatives Of

The synthesis is reported of derivatives of 6,6'-dimethyl-2,2'-bipyridine in which adenosine, thymidine aid tryptophan substituents are introduced at the 4,4'-positions as amide derivatives. Artificial oligonucleoside strands derived from the corresponding trisbipyridyl ligand , in which three bipyridyl ligands are separated by methyleneoxy bridges, have been prepared. The solubility of the nucleoside-substituted ligands in organic solvents is poor, but acylation of the ribose or deoxyribose units present in the ligands provides a mechanism whereby organic solubility can be improved. These ligands may be used for the preparation of metallo-exoreceptors , with the potential for recognition of biological targets such as nucleic acids. Preliminary metal ion complexation studies have been carried out.

Chiral Schiff base derivatives of calix[4]arene: synthesis and complexation studies with chiral and achiral amines

2006 ◽  
Vol 17 (16) ◽  
pp. 2322-2327 ◽  
Author(s):  
Mustafa Durmaz ◽  
Sabri Alpaydin ◽  
Abdulkadir Sirit ◽  
Mustafa Yilmaz
Keyword(s):  
Schiff Base ◽  
Schiff Base Derivatives ◽  
Complexation Studies ◽  
Chiral Schiff Base ◽  
Derivatives Of

N,N′-diacetate derivatives of some polyoxa-polyaza macrocyclic compounds: Protonation and complexation studies

Polyhedron ◽  
1992 ◽  
Vol 11 (15) ◽  
pp. 1891-1899 ◽  
Author(s):  
M.Teresa S. Amorim ◽  
Rita Delgado ◽  
J.J.R.Fraústo da Silva
Keyword(s):  
Macrocyclic Compounds ◽  
Complexation Studies ◽  
Derivatives Of
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