13401-33-7Relevant academic research and scientific papers
A New Sensitive and Selective Off-On Fluorescent Zn2+ Chemosensor Based on 3,3′,5,5′-Tetraphenylsubstituted Dipyrromethene
Bumagina, Natalia A.,Antina, Elena V.,Nikonova, Anna Yu.,Berezin, Mikhail B.,Ksenofontov, Alexander A.,Vyugin, Anatoly I.
, p. 1967 - 1974 (2016)
3,3′,5,5′-Tetraphenyl-2,2′-dipyrromethene was described as a highly sensitive and selective Off-on fluorescent colorimetric chemosensor for Zn2+ based on the chelation-enhanced fluorescence (CHEF) effect. The reaction of dipyrromethene ligand with Zn2+ induces the formation of the [ZnL2] complex, which exhibits the increasing fluorescence in 120 fold compared with ligand in the propanol-1/cyclohexane (1:30) binary mixture. The Zn2+ detection limit was 1.4?×?10?7 М. The UV-Vis and fluorescence spectroscopic studies demonstrated that the dipyrromethene sensor was highly selective toward Zn2+ cations over other metal ions (Na+, Mg2+, Co2+, Ni2+, Fe3+, Cu2+, Mn2+, Cd2+ and Pb2+), excluding Hg2+.
Aza-BODIPY: Improved synthesis and interaction with soluble Aβ1-42 oligomers
Jameson, Laramie P.,Dzyuba, Sergei V.
, p. 1732 - 1735 (2013)
Dye-binding assays that are used to evaluate anti-aggregation ability of small molecule inhibitors towards amyloids are known to be prone to false-positive effects due to spectral overlaps between the dye and the inhibitor. Aza-BODIPY dye, which has both
The computational and experimental investigations of photophysical and spectroscopic properties of BF2 dipyrromethene complexes
Valiev,Sinelnikov,Aksenova,Kuznetsova,Berezin,Semeikin,Cherepanov
, p. 323 - 329 (2014)
The electronic excited states of BF2 dipyrromethene (2BrDPM, DPMI, DPMII, PM567 and 4PhDPM) complexes were investigated using the extended multi-configuration quasi-degenerate at the second order of perturbation theory (XMCQDPT2) and the second-order approximate coupled-cluster (CC2) methods. The excitation energies calculated by CC2 are significantly overestimated by 0.42-0.59 eV because of the substantial contributions of double excitation levels to excited states (>10%). However, the calculated XMCQDPT2 excitation energies agree well with experimental ones within the accuracy 0.11-0.20 eV. The very low lasing efficiency (7.8-8.4%) of 4PhDPM compound was explained by the T1 → T4 and T1 → T5 reabsorptions at XMCQDPT2 level of theory. The molecular photonics of pyrromethenes are studied using a combination of the first-principle and semi-empirical calculations. The main mechanism for the deactivation of the energy of the first singlet excited electronic state is the radiative electronic transition for DPMI, DPMII, PM567 and 4PhDPM compounds. Also, the main mechanism for the quenching of fluorescence in considered complexes (except DPMII compound) is the internal conversion. The processes of the internal conversion and intersystem crossing compete with each other in DPMII compound. The measured and calculated fluorescence quantum yields agree well for all considered molecules.
Synthesis, spectral-luminescent properties of B(III) and Zn(II) complexes with alkyl- and aryl-substituted dipyrrins and azadipyrrins
Antina,Berezin,Dudina,Burkova,Nikonova, A. Yu.
, p. 1187 - 1194 (2015/02/02)
Effect of complexing atom, molecular structure of dipyrrolylmethene and its aza analog on spectral-luminescent properties of heteroleptic boron(III) and homoleptic zinc(II) complexes with 3,3′,5,5′-tetramethyl-2,2′-dipyrrolylmethene, 3,3′,5,5′-tetraphenyl
