abstract
Lanthanide coordination compounds NMe4[LnL(4)], NEt4[LnL(4)] and PPh4[LnL(4)] (Ln(3+) = Eu, Gd, Tb) with the carbacylamidophosphate (CAPh) ligand dimethyl-N-trichloroacetylamidophosphate (HL= Cl3CC(O)N(H)P(O)(OMe)(2)) were synthesized. These complexes are characterized using infrared, ultraviolet diffuse reflection, and luminescence spectroscopy as well as through elemental and X-ray analyses. The effect of changing the cation type on the structure and luminescence properties of the tetrakis-complex [LnL(4)](-) was analyzed. TD-DFT calculations reveal cation-specific contributions to the excited states in tetrakis complexes, with [PPh4](+) playing a central role in both singlet and triplet states. This leads to longer donor-acceptor distances compared to NMe4[LnL(4)] and NEt4[LnL(4)]. Additionally, intramolecular energy transfer (IET) calculations for Eu3+ and Tb3+ tetrakis compounds reveal Tb3+ sensitization via S-1 and Eu(3+)via the typical T-1 state.
subject category
Chemistry
authors
Struhatska, MB; Kariaka, NS; Dyakonenko, VV; Shishkina, SV; Smola, SS; Rusakova, NV; Gawryszewska, P; Malta, OL; Carneiro Neto, AN; Trush, VO; Amirkhanov, VM
our authors
Albano Neto Carneiro Neto
Junior ResearcherProjects
Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
acknowledgements
This work was supported by the Ministry of Education and Science of Ukraine [grant number 22BF037-04]. This work was developed within the scope of the projects CICECO - Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020, and LA/P/0006/2020, and the Shape of Water (PTDC/NAN-PRO/3881/2020) financed by national funds through the FCT/MCTES (PIDDAC).