1351797-65-3Relevant academic research and scientific papers
Triphenylamine substituted dipyrrinato metal complexes: Synthesis, optical and electrochemical studies
Das, Sudipta,Gupta, Iti
, p. 54 - 60 (2015)
A series of triphenylamine substituted dipyrrinato metal complexes (1-8) have been synthesized. The mononuclear type complexes 1-6 have Ni(II), Co(II), Pd(II), In(III), and Zn(II) metal ions in the core. The binuclear type complexes 7 and 8 have Zn(II) metal ion in the center. All the compounds (1-8) were characterized by HRMS, NMR, IR, UV-vis absorption, cyclic voltammetry and fluorescence techniques. The presence of large electron rich triphenylamine moiety at dipyrrin ligands affected the spectral properties of complexes. Except Co(II) complex, other metal complexes exhibited blue shifted absorption maxima in UV-vis studies. The In(III) and Zn(II) metal complexes 4-6 showed red shifted emission maxima in fluorescence compared to their corresponding phenyl analogues. Complexes 3-8 exhibited good Stokes shifts in the range of 4600 to 7000 cm- 1 with reduced quantum yields. Singlet state lifetimes of complexes 3-8 were in the range of 2 to 4 ns; also the decrease in radiative decay constants kr and the increase in non-radiative decay constants knr were in line with the quantum yield data. CV studies of complexes 1-8 showed anodic shifts in the oxidation potentials, suggesting that meso-triphenylamine group has affected the electronic properties of complexes by making them difficult to oxidize.
Synergistic effects of photoinduced electron transfer and heavy atom effect based on BODIPY for efficient triplet photosensitizers
Kim, Hong Mo,Kim, Jae Hyuk,Kim, Jae Pil,Lee, Hyun Kyu,Lee, Jae Moon,Park, Jeong Min
, (2021/09/20)
Achieving a long triplet lifetime and a high triplet quantum yield for efficient triplet sensitizers are crucial for commercializing triplet–triplet annihilation–upconversion (TTA-UC). Although many donor-acceptor (D-A) or heavy atom-based triplet sensiti
