Bright red emission with high color purity from Eu(iii) complexes with π-conjugated polycyclic aromatic ligands and their sensing applications

Abstract

In this review, we summarize the research progress on π-conjugated Eu(iii) luminophores exhibiting bright emission and their physical sensing applications.

Effective Photosensitization in Excited‐State Equilibrium: Brilliant Luminescence of TbIII Coordination Polymers Through Ancillary Ligand Modifications

“…The excited‐state equilibrium systems have been demonstrated using the various typed ligands by Parker and Faulkner [13–17] . Recently, we demonstrated that a poly‐aromatic hydrocarbon photosensitizer with a long‐lived T 1 state provides the strong emission in the excited state equilibrium (Figure 1a–b) [18,19] . Herein, we provide a novel method for controlling the T 1 lifetime of photosensitizer units by changing the structure of the ancillary ligand of the complex (Figure 1c).…”

“…[13][14][15][16][17] Recently, we demonstrated that a poly-aromatic hydrocarbon photosensitizer with a long-lived T 1 state provides the strong emission in the excited state equilibrium (Figure 1a-b). [18,19] Herein, we provide a novel method for controlling the T 1 lifetime of photosensitizer units by changing the structure of the ancillary ligand of the complex (Figure 1c). The present method, which leaves the photosensitizer unmodified, opens up new possibilities for the development of photofunctional materials.…”

Multifunctional lanthanide MOF luminescent sensor built by structural designing and energy level regulation of a ligand

“…metal-organic frameworks (Ln-MOFs), especially Eu/Tb-MOFs, [23][24][25][26][27][28][29][30][31][32][33][34] have been developed widely for luminescence and detection because the luminescence behaviors of Eu 3+ and Tb 3+ have many advantages due to f-f transitions, such as a relatively fixed emission wavelength, narrow emission peak, larger Stokes shift, etc. However, the absorption peaks of Eu 3+ and Tb 3+ are too narrow to achieve a higher fluorescence quantum yield.…”

Computational analysis, Urbach energy and Judd–Ofelt parameter of warm Sm3+complexes having applications in photovoltaic and display devices

“…Much work is devoted to the synthesis of Eu 3+ and Tb 3+ complexes, which are characterized by brilliant luminescence and better emission in the red and green regions respectively. [13][14][15] In comparison with Eu 3+ and Tb 3+ ions, the optical properties of Sm 3+ ions are less studied due to a smaller energy gap between the resonating level ( 4 G 5/2 ) and the subsequent energy state. 5,9,16,17 However, the Sm 3+ ion has some other extraordinary properties such as dual emitting behaviour in UV-visible as well as NIR regions and also emission of various colors (red, orange and green) in a single complex that attract the attention of authors.…”