53746-90-0Relevant academic research and scientific papers
Optical properties of 3-substituted indoles
Hota, Prasanta Kumar,Kumar, Jagdeep,Kumar, Naresh
, p. 28213 - 28224 (2020)
The optical properties of various donor or acceptor p-phenyl substituted ethenyl indoles were studied in solvents of varying polarity using absorption, fluorescence and TDDFT methods. Ethenyl indole exhibits non-linear optical properties (NLO) in a substi
Fluorescence and photoisomerization studies of p-nitrophenyl-substituted ethenylindoles
Singh, Anil K.,Hota, Prasanta K.
, p. 43 - 52 (2006)
The synthesis, electronic absorption, fluorescence (λf, λeX, Φf, τf) and photoisomerization (Φt→c, photostationary state composition) properties of 3-(4-nitrophenylethenyl-E)-NH-indole (1), 3-(4- nitr
Antioxidant properties of ethenyl indole: DPPH assay and TDDFT studies
Hota, Prasanta Kumar,Kumar, Jagdeep,Kumar, Naresh,Sati, Nitin
supporting information, p. 8960 - 8970 (2020/06/08)
A series of ethenyl indoles (e.g.3-(4-substituted phenylethenyl-E)-N-H-indole) with various donor or acceptor substituents have been synthesized and their antioxidant properties have been studied. Ethenyl indoles exhibit antioxidant activity in a substituent dependent manner. Ethenyls bearing strong electron withdrawing substituents show weak or no antioxidant activity, whereas ethenyls with electron donating substituents exhibit antioxidant properties comparable to vitamin E. It can be seen from a plot of the percentage of inhibitionversusthe antioxidant concentration, that the hydroxy substituted ethenyl indole exhibits good antioxidant properties (50% inhibition concentration (IC50) ～ 24 μM) as compared to the other ethenyls (IC50: 30-63 μM) and that it is comparable to vitamin E (IC50～ 26 μM). The results are also supported by the computational data obtained through time dependent density functional theory (TDDFT) calculations. From the TDDFT and antioxidant study, it was shown that there is a correlation between the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) energy, the ground state dipole moment, optical band gap, bond dissociation enthalpy and the ionization potential of the ethenyls with the antioxidant properties. A possible hydrogen and/or electron and proton transfer mechanism is suggested for the quenching of the free radical.
Excited state and fluorescence probe properties of donor-acceptor substituted ethenes: A plausible photochromic material for organic electronics
Kumar, Jagdeep,Kumar, Naresh,Hota, Prasanta Kumar
, p. 301 - 307 (2019/05/21)
The photochemistry and photophysics of conjugated linear polyenes are significantly influenced by the substituent and medium polarity. The linear polyene with strong donor-acceptor substituent exhibits intra molecular charge transfer in polar. solvent, wh
Photoreactivity of donor - Acceptor ethenes
Singh, Anil K.,Hota, Prasanta K.
, p. 2048 - 2053 (2007/10/03)
While 3-(4-nitrophenyl ethenyl-E)-N-H indole is photochemically stable, and shows dramatically red-shifted solvatochromic fluorescence emission (λem 642 nm with λex 405 nm in acetonitrile), the corresponding p-aminophenyl derivative,
