162102-79-6Relevant articles and documents
Novel “bi-modal” H2dedpa derivatives for radio- and fluorescence imaging
Ramogida, Caterina F.,Murphy, Lisa,Cawthray, Jacqueline F.,Ross, James D.,Adam, Michael J.,Orvig, Chris
, p. 253 - 262 (2016)
A novel pyridyl functionalized analog of the promising hexadentate 68Ga3 + chelate H2dedpa (N4O2, 1,2-[[6-carboxy-pyridin-2-yl]-methylamine]ethane) was successfully synthesized and characterized. This
Water-stable lanthanide-organic macrocycles from a 1,2,4-triazole-based chelate for enantiomeric excess detection and pesticide sensing
Cheng, Kai,Bai, Qi-Xia,Hu, Shao-Jun,Guo, Xiao-Qing,Zhou, Li-Peng,Xie, Ting-Zheng,Sun, Qing-Fu
, p. 5759 - 5764 (2021)
Water-stable anionic Ln2L2-type (Ln = LaIIIand EuIII) lanthanide-organic macrocycles have been constructed by deprotonation self-assembly of a bis-tridentate ligand consisting of two 2,6-bis-(1,2,4-triazole)-pyridine chelation arms bridged by a dibenzofuran chromophore, of which the luminescent Eu2L2macrocycle can be used for enantiomeric excess (ee) detection toward pybox-type chiral ligands and selective colorimetric sensing of omethoate (OMA) in water.
The Photocatalyzed Thiol-ene reaction: A New Tag to Yield Fast, Selective and reversible Paramagnetic Tagging of Proteins
Cerofolini, Linda,Denis, Maxime,Fragai, Marco,Gentili, Matteo,Giuntini, Stefano,Luchinat, Claudio,Nativi, Cristina,Parigi, Giacomo,Popowicz, Grzegorz,Ravera, Enrico,Sattler, Michael,Softley, Charlotte
, (2020)
Paramagnetic restraints have been used in biomolecular NMR for the last three decades to elucidate and refine biomolecular structures, but also to characterize protein-ligand interactions. A common technique to generate such restraints in proteins, which do not naturally contain a (paramagnetic) metal, consists in the attachment to the protein of a lanthanide-binding-tag (LBT). In order to design such LBTs, it is important to consider the efficiency and stability of the conjugation, the geometry of the complex (conformational exchanges and coordination) and the chemical inertness of the ligand. Here we describe a photo-catalyzed thiol-ene reaction for the cysteine-selective paramagnetic tagging of proteins. As a model, we designed an LBT with a vinyl-pyridine moiety which was used to attach our tag to the protein GB1 in fast and irreversible fashion. Our tag T1 yields magnetic susceptibility tensors of significant size with different lanthanides and has been characterized using NMR and relaxometry measurements.
Estimating the donor-acceptor distance to tune the emission efficiency of luminescent lanthanide compounds
Monteiro, Jorge H.S.K.,De Bettencourt-Dias, Ana,Sigoli, Fernando A.
, p. 709 - 712 (2017)
The influence of the donor-acceptor distance RL on the photophysical properties, including the emission quantum yield, of two europium complexes with the same coordination number, and thus similar microsymmetries, was investigated by spectroscopic and computational methods. K3 [Eu(dipicCbz) 3] was synthesized using the new ligand dipicCbz and its photophysical properties compared to Cs3 [Eu(dipic) 3]. We found that a 50% increase in RL from 4.1 to 6.5 ? results in a substantial decrease in the emission efficiency from 24 to 1.8%.
Sensitised lanthanide luminescence using a RuIIpolypyridyl functionalised dipicolinic acid chelate
Chong, Bowie S. K.,Etchells, Isaac M.,Ireland, Alexander R.,Moore, Evan G.,Pfrunder, Michael C.,Rajah, Divya
, p. 7400 - 7408 (2021)
A visible light absorbing [RuII(tpy)2]2+-type chromophore appended with a dipicolinic acid LnIIIchelator has been prepared and complexed with several differing lanthanide cations to form the corresponding heterobimetallic d-f assemblies. The subseqent solution speciation analysed by1H NMR spectroscopy revealed an unexpected decrease in the LnIIIchelate complex stability, in particular for the 1?:?3 complex, when compared to the parent dipicolinic acid. As a result, the desired Ln(ML)3complexes could not be isolated, and the 1?:?1 LnIII-ML complexes were instead characterised and investigated using steady state absorption and emission spectroscopy. Sensitised NIR emission from the YbIII, NdIIIand ErIIIcomplexes was observed upon1MLCT excitation of the RuIIbased metalloligand in the visible region atca.485 nm. Investigations using transient absorption spectroscopy revealed essentially quantitative intersystem crossing to form the3MLCT excited state, as expected, which then acts as the energy donor for the metalloligand based antennae effect, facilitating sensitisation efficiencies of 4.8, 17.0 and 37.4% respectively for the YbIII, ErIIIand NdIIIcations.
Unusual Magnetic Field Responsive Circularly Polarized Luminescence Probes with Highly Emissive Chiral Europium(III) Complexes
Zhang, Junhui,Dai, Lixiong,Webster, Alexandra M.,Chan, Wesley Ting Kwok,Mackenzie, Lewis E.,Pal, Robert,Cobb, Steven L.,Law, Ga-Lai
supporting information, p. 1004 - 1010 (2020/11/30)
Chirality is ubiquitous within biological systems where many of the roles and functions are still undetermined. Given this, there is a clear need to design and develop sensitive chiral optical probes that can function within a biological setting. Here we report the design and synthesis of magnetically responsive Circularly Polarized Luminescence (CPL) complexes displaying exceptional photophysical properties (quantum yield up to 31 % and |glum| up to 0.240) by introducing chiral substituents onto the macrocyclic scaffolds. Magnetic CPL responses are observed in these chiral EuIII complexes, promoting an exciting development to the field of magneto-optics. The |glum| of the 5D0 → 7F1 transition increases by 20 % from 0.222 (0 T) to 0.266 (1.4 T) displaying a linear relationship between the Δglum and the magnetic field strength. These EuIII complexes with magnetic CPL responses, provides potential development to be used in CPL imaging applications due to improved sensitivity and resolution.