129077-54-9Relevant academic research and scientific papers
Interaction of 6,6′′-bis(5,5,8,8-tetramethyl-5,6,7,8- tetrahydro-1,2,4-benzotriazin-3-yl)-2,2′:6′,2′′- terpyridine (CyMe4-BTTP) with some trivalent ions such as lanthanide(iii) ions and americium(iii)
Lewis, Frank W.,Harwood, Laurence M.,Hudson, Michael J.,Drew, Michael G. B.,Modolo, Giuseppe,Sypula, Michal,Desreux, Jean F.,Bouslimani, Nouri,Vidick, Geoffrey
, p. 5172 - 5182 (2010)
The new ligand 6,6′′-bis(5,5,8,8-tetramethyl-5,6,7,8- tetrahydro-1,2,4-benzotriazin-3-yl)-2,2′:6′,2′′- terpyridine (CyMe4-BTTP) has been synthesized in 4 steps from 2,2′:6′,2′′-terpyridine. Detailed NMR and mass spectrometry studies indicate th
New Heteroaromatic Complexing Agents and Luminescence of Their Europium(III) and Terbium(III) Chelates
Mukkala, Veli-Matti,Sund, Christian,Kwiatkowski, Marek,Pasanen, Paavo,Hoegberg, Marita,et al.
, p. 1621 - 1632 (1992)
Twelve heteroaromatic complexing agents 9a-l were synthesized with the purpose to develop suitable labels for time-resolved luminescence-based bioaffinity assays.The relative luminescence yields, excitation maxima, and emission decay constants of their europium(III) and terbium(III) chelates were determined.According to these results, 2,2',2'',2'''-tetrakis(acetic acid) (9e) and 2,2',2'',2'''-tetrakis(acetic acid) (9l) are the most promising agents.
Direct access to terpyridine-containing polyazamacrocycles as photosensitizing ligands for Eu(III) luminescence in aqueous media
Galaup, Chantal,Couchet, Jean-Marc,Bedel, Sebastien,Tisnes, Pierre,Picard, Claude
, p. 2274 - 2284 (2005)
(Chemical Equation Presented) The synthesis of new 18-membered hexaazamacrocycles containing a functionalized 2,2′:6′,2″- terpyridine moiety as part of the cyclic backbone and three acetate pendant arms is described. The reported synthetic procedure is ba
Stable Europium(III) Complexes with Short Linkers for Site-Specific Labeling of Biomolecules
Faschinger, Felix,Ertl, Martin,Zimmermann, Mirjam,Horner, Andreas,Himmelsbach, Markus,Sch?fberger, Wolfgang,Kn?r, Günther,Gruber, Hermann J.
, p. 721 - 732 (2017/12/12)
In this study, two new terpyridine-based EuIII complexes were synthesized, the structures of which were optimized for luminescence resonance energy-transfer (LRET) experiments. The complexes showed high quantum yields (32 %); a single long life
Remarkable tuning of the coordination and photophysical properties of lanthanide ions in a series of tetrazole-based complexes
Andreiadis, Eugen S.,Demadrille, Renaud,Imbert, Daniel,Pecaut, Jacques,Mazzanti, Marinella
scheme or table, p. 9458 - 9476 (2010/04/05)
A series of seven new tetrazole-based ligands (Ll, L3-L8) containing terpyridine or bipyridine chromophores suited to the formation of luminescent complexes of lanthanides have been synthesized. All ligands were prepared from the respective carbonitriles by thermal cycloaddition of sodium azide. The crystal structures of the homoleptic terpyridine-tetrazolate complexes [Ln(Li)2]NHEt3 (Ln = Nd, Eu, Tb for i = 1, 2; Ln = Eu for i = 3, 4) and of the monoaquo bypyridine-tetrazolate complex [Eu(H 2O)(L7)2]NHEt3 were determined. The tetradentate bipyridine-tetrazolate ligand forms nonhelical complexes that can contain a water molecule coordinated to the metal. Conversely, the pentadentate terpyridine-tetrazolate ligands wrap around the metal, thereby preventing solvent coordination and forming chiral double-helical complexes similarly to the analogue terpyridine-carboxylate. Proton NMR spectroscopy studies show that the solid-state structures of these complexes are retained in solution and indicate the kinetic stability of the hydrophobic complexes of terpyridine-tetrazolates. UV spectroscopy results suggest that terpyridine-tetrazolate complexes have a similar stability to their carboxylate analogues, which is sufficient for their isolation in aerobic conditions. The replacement of the carboxylate group with tetrazolate extends the absorption window of the corresponding terpyridine- (≈ 20nm) and bipyridine-based (25 nm) complexes to-wards the visible region (up to 440 nm). Moreover, the substitution of the terpyridine-tetrazolate system with different groups in the ligand series L3-L6 has a very important effect on both absorption spectra and luminescence efficiency of their lanthanide complexes. The tetrazole-based ligands Ll and L3-L8 sensitize efficiently the luminescent emission of lanthanide ions in the visible and near-IR regions with quantum yields ranging from 5 to 53 % for Eu III complexes, 6 to 35 % for Tb1" complexes, and 0.1 to 0.3% for NdIII complexes, which is among the highest reported for a neodymium complex. The luminescence efficiency could be related to the energy of the ligand triplet states, which are strongly correlated to the ligand structures.
The synthesis of poly-nitrile aromatic and oligopyridine ligands via palladium-catalyzed cyanation of aryl halides
Veauthier, Jacqueline M.,Carlson, Christin N.,Collis, Gavin E.,Kiplinger, Jaqueline L.,John, Kevin D.
, p. 2683 - 2686 (2007/10/03)
Modification of Seller's palladium-catalyzed cyanation procedure for simple aromatic halides leads to a versatile and rapid route to complex multi-nitrile aryl and oligopyridyl ligands that improves on known literature methods. By heating the reagents in the high boiling solvent mesitylene to reflux temperatures at ambient pressure, we have observed the conversion of halogenated precursors to the corresponding nitrile compounds. The resulting compounds can be precipitated from CH2Cl2 solutions of the reaction mixtures and isolated as pure compounds in moderate to high yields. The current approach offers a safer alternative to the pressure tube method, as it does not involve the use of KCN at high pressures. Georg Thieme Verlag Stuttgart.
