18895-96-0Relevant academic research and scientific papers
DTTA-appended 6-phenyl- and 5,6-diphenyl-2,2′-bipyridines as new water soluble ligands for lanthanide cations
Krinochkin, Alexey P.,Kopchuk, Dmitry S.,Kim, Grigory A.,Ganebnykh, Ilya N.,Kovalev, Igor S.,Zyryanov, Grigory V.,Li, Fengyu,Rusinov, Vladimir L.,Chupakhin, Oleg N.
, p. 59 - 64 (2017)
By means of “1,2,4-triazine” strategy new DTTA-appended 6-phenyl- and 5,6-diphenyl-2,2′-bipyridines – ligands for lanthanides cations have been synthesized, and their luminescent lanthanides (Sm3+, Eu3+, Tb3+ and Dy3+) water-soluble complexes have been prepared. The photophysical properties of new chelates were studied; comparison of quantium yields of fluorescence and lanthanide cation luminescence has been fulfilled. Comparison of characteristics of new complexes with ones of some previously published chelates has been done, for some cases a bathochromic shift in absorption spectra and higher lanthanide luminescence quantum yields were observed.
1,2,4-Triazine-picolinamide functionalized, nonadentate chelates for the segregation of lanthanides(iii) and actinides(iii) in biphasic systems
Guillet, Gary L.,Hyatt, I. F. Dempsey,Hillesheim, Patrick C.,Abboud, Khalil A.,Scott, Michael J.
, p. 119 - 131 (2013/02/22)
A novel family of nonadentate ligands based on the (5,6-diphenyl-1,2,4- triazin-3-yl)-picolinamide donor moiety has been synthesized from simple starting materials in high yield and purity. This group of ligands is an addition to the neutral nonadentate group but the first to incorporate 1,2,4-triazine. Their ability to extract a select group of lanthanides from acidic aqueous solution has been correlated to their ability to meet the ideal trigonal tricapped prismatic geometry that is seen by lanthanides and actinides in aqueous solution. The rate of metallation was determined using UV/VIS spectroscopy with pseudo first order conditions and showed similar behaviour to literature examples. Theoretical calculations were used to probe the bonding structure with lanthanides and actinides to predict the potential Ln/An segregating ability of the new ligands.
