Achieving visible light excitation in carbazole-based Eu³⁺–β-diketonate complexes via molecular engineering

Abstract

A series of visible light excited Eu3+–carbazole based β-diketonate complexes has been developed by molecular engineering.

Amine‐Functionalized Silica Nanoparticles Incorporating Covalently Linked Visible‐Light‐Excitable Eu3+ Complexes: Synthesis, Characterization, and Cell‐Uptake Studies

“…The downfield shift observed in the 31 P NMR spectrum (from δ = –18.34 ppm to δ = 30.85 ppm) of DPOXPO confirms the successful oxidation of the phosphine to the phosphine oxide. The solvated complex, Eu( L2 ) 3 (C 2 H 5 OH) 2 {H L2 = 4,4,5,5,5‐pentafluoro‐3‐hydroxy‐1‐[9‐(4‐methoxyphenyl)‐9 H ‐carbazol‐2‐yl]pent‐2‐en‐1‐one}, was synthesized according to the method described in our recent publication . The synthesis procedure for Eu 3+ complex 1 is depicted in Scheme .…”

“…Solvents were dried using standard methods. The solvated Eu 3+ complex [Eu( L2 ) 3 (C 2 H 5 OH) 2 ] was synthesized according to the method described in our earlier publication . The FTIR spectra of the compounds were measured using KBr pellets with a Bruker TENSOR 37 FTIR spectrometer, at ambient temperature, operating in the range 4000–500 cm –1 .…”

“…Herein, a novel bidentate phosphine oxide molecule, 4,6‐bis(diphenylphosphoryl)‐10 H ‐phenoxazine ( DPOXPO ) (Scheme ) was synthesized to be used as an efficient neutral donor for Eu 3+ ions. Using our previously reported carbazole‐based β‐diketonate molecule as the primary ligand and DPOXPO as the neutral donor, we prepared the corresponding Eu 3+ complex 1 (Scheme ) and investigated its photophysical properties. The newly designed DPOXPO has a functional NH group to which a variety of substituents can be introduced.…”

Construction of lanthanide complexes supported by 2,3‐dimethoxybenzoic acid and 5,5’‐dimethy‐2,2’‐bipyridine: crystal structures, thermoanalysis, magnetic and fluorescence properties

“…Rare earth ions have magnetic anisotropy in magnetism, which makes them often used to make molecular‐based magnetic materials, such as single‐molecule magnets (SMMs) and single‐chain magnets (SCMs) . Not only that, rare‐earth ions are also used in other fields, such as bioassays, biological labels, light‐converting optical materials luminescent probes and light emitting diodes . However, the parity‐forbidden 4f‐4f transitions of rare‐earth ions results in poor absorption coefficients and weak luminescence intensity .…”

Europium complexes: choice of efficient synthetic routes from RM1 thermodynamic quantities as figures of merit

“…15 Syntheses of lanthanide complexes are frequently carried out by means of ligand displacement reactions. In particular, ternary b-diketonate europium complexes [Eu(b) 3 (L) 2 ], where L stands for a non-ionic ligand, can be prepared by the usual synthetic route: 12,13,[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]…”