The stereoselectivity of bipyrrolidine-based sequential polydentate ligands around Ru(ii)

2016 ◽  
Vol 52 (51) ◽  
pp. 7932-7934 ◽  
Author(s):  
Yanay Popowski ◽  
Israel Goldberg ◽  
Moshe Kol
Keyword(s):  
Coordination Chemistry ◽  
The Novel ◽  
Polydentate Ligands ◽  
Pentadentate Ligands

The Ru(ii) coordination chemistry of the sequential hexadentate, tetradentate and the novel hybrid pentadentate ligands assembled around the chiral bipyrrolidine core and including bipyridyl and pyridyl periphery units is described.

scholarly journals Novel ion-binding C3 symmetric tripodal triazoles: synthesis and characterization

2014 ◽  
Vol 12 (1) ◽  
pp. 115-125 ◽  
Author(s):  
Gábor Neumajer ◽  
Gergő Tóth ◽  
Szabolcs Béni ◽  
Béla Noszál
Keyword(s):  
2D Nmr ◽  
Ion Binding ◽  
The Novel ◽  
Spectrometric Data ◽  
Polydentate Ligands ◽  
Nmr Techniques ◽  
Sonogashira Reactions ◽  
Symmetric Ligands ◽  
Complexation Process

AbstractNovel C3 symmetric tripodal molecules were synthesized from cyclohexane 1,3,5-tricarboxylic acid. Utilizing click and Sonogashira reactions, ion-binding triazole and pyridazin-3(2H)-one units were incorporated to form polydentate ligands for ion complexation. The structures of the novel C3 symmetric derivatives were extensively characterized by 1H, 13C and 2D NMR techniques along with HRMS and IR. The copper(I)-binding potentials of these ligands were investigated by using them as additives in model copper(I)-catalysed azide-alkyne cycloaddition (CuAAC) reactions. The copper(I) complexation ability of our compound was also proved by different spectroscopic methods, such as mass spectrometry, UV and NMR spectroscopy. Based on the mass spectrometric data all of the C3 symmetric ligands formed 1:1 complex with copper(I) ion. The specific role of C3 symmetric polydentate form in the complexation process was also discussed

scholarly journals Synthesis and coordination chemistry of boron-functionalized poly(pyrazolylpyridyl)borate with Ln(III) metals

2018 ◽  
Vol 22 (2) ◽  
pp. 73
Author(s):  
Nawal Al-Rasbi ◽  
Michael David D.Ward
Keyword(s):  
Coordination Chemistry ◽  
Excited States ◽  
State Energy ◽  
Luminescence Spectra ◽  
Dinuclear Complexes ◽  
Spectroscopic Methods ◽  
The Novel ◽  
X Ray ◽  
New Family ◽  
Triplet State Energy

A new family of lanthanide/boron-based complexes have been synthesized from the novel substituted poly(pyrazolylpyridyl)borate ligand containing phenyl substituents on the boron atom Ph2Bppy (L). The complexes have been fully characterized by analytical and spectroscopic methods. The single crystal X-ray structure and mass spectroscopy reveal the isostructural dinuclear complexes: [Ln2(L)2(NO3)2(OH)2] where Ln = Eu, Gd or Tb. Upon excitation of the Ln(III) complexes in DCM, their luminescence spectra display narrow f–f transitions. It is found that the ligand can efficiently sensitize the Tb(III) complex because of the better triplet state energy match to the Tb(III)–5D0 excited states.

Sign in / Sign up

Export Citation Format

Share Document