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Aminonaphthalene

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Chittaranjan Sinha – 1st expert on this subject based on the ideXlab platform

  • ruthenium ii carbonyl complexes with n 2 pyridyl methyliden α β Aminonaphthalene synthesis spectroscopic studies and dft calculation
    Journal of Molecular Structure, 2013
    Co-Authors: Shyamal Kumar Sarkar, Mahendra Sekhar Jana, Tapan Kumar Mondal, Chittaranjan Sinha

    Abstract:

    Abstract Reaction of RuH(Cl)(CO)(PPh 3 ) 3 with bidentate Schiffs base ligands, N-[(2-pyridyl)methyliden]-α/β-Aminonaphthalene ( L 1 / L 2 ) led to the formation of photoluminescence ruthenium carbonyl complexes formulated as [RuCl(CO)(PPh 3 ) 2 (L 1 /L 2 )](PF 6 ) ( 1a / 1b ) and [RuH(CO)(PPh 3 ) 2 (L 1 /L 2 )](PF 6 ) ( 2a / 2b ) [ L 1 = N-[(2-pyridyl)methyliden]-α-Aminonaphthalene and L 2 = N-[(2-pyridyl)methyliden]-β-Aminonaphthalene]. The complexes have been characterized by analytical and spectroscopic (IR, UV–Vis and 1 H NMR) techniques. The complexes exhibit a MLCT band in the visible region and are emissive in room temperature. The cyclic voltammetric study shows Ru(II)/Ru(III) quasi reversible one electron oxidation couple in the range 0.95–1.15 V. The single crystal X-ray structure of 2a shows distorted octahedral geometry around ruthenium atom. DFT calculations are employed to study the structural and electronic features and to support the spectroscopic data.

  • Ruthenium(II) carbonyl complexes with N-[(2-pyridyl)methyliden]-(α/β)-Aminonaphthalene: Synthesis, spectroscopic studies and DFT calculation
    Journal of Molecular Structure, 2013
    Co-Authors: Shyamal Kumar Sarkar, Mahendra Sekhar Jana, Tapan Kumar Mondal, Chittaranjan Sinha

    Abstract:

    Abstract Reaction of RuH(Cl)(CO)(PPh 3 ) 3 with bidentate Schiffs base ligands, N-[(2-pyridyl)methyliden]-α/β-Aminonaphthalene ( L 1 / L 2 ) led to the formation of photoluminescence ruthenium carbonyl complexes formulated as [RuCl(CO)(PPh 3 ) 2 (L 1 /L 2 )](PF 6 ) ( 1a / 1b ) and [RuH(CO)(PPh 3 ) 2 (L 1 /L 2 )](PF 6 ) ( 2a / 2b ) [ L 1 = N-[(2-pyridyl)methyliden]-α-Aminonaphthalene and L 2 = N-[(2-pyridyl)methyliden]-β-Aminonaphthalene]. The complexes have been characterized by analytical and spectroscopic (IR, UV–Vis and 1 H NMR) techniques. The complexes exhibit a MLCT band in the visible region and are emissive in room temperature. The cyclic voltammetric study shows Ru(II)/Ru(III) quasi reversible one electron oxidation couple in the range 0.95–1.15 V. The single crystal X-ray structure of 2a shows distorted octahedral geometry around ruthenium atom. DFT calculations are employed to study the structural and electronic features and to support the spectroscopic data.

  • palladium ii complexes of n 2 pyridyl methyliden α or β Aminonaphthalene single crystal x ray structure of di chloro n 2 pyridyl methyliden β Aminonaphthalene palladium ii pd β naipy cl2 spectra and dft td dft study
    Polyhedron, 2007
    Co-Authors: P Pratihar, Tapan Kumar Mondal, Golam Mostafa, Chittaranjan Sinha

    Abstract:

    Palladium(II) complexes of N -[(2-pyridyl)methyliden]-α(or β)-Aminonaphthalene (α or β-NaiPy) are reported in this work. They are spectroscopically characterized along with some mixed ligand complexes, using diimine and azoimine functions. The single crystal X-ray structure of [Pd( N -(2-pyridyl)methyliden-β-Aminonaphthalene)Cl 2 ] has been determined. Luminescence properties of the complexes exhibit a ligand centered π–π ∗ emission. Quantum yields ( ϕ ) have been calculated and it has been observed that the complexes of α-NaiPy show higher ϕ values than the complexes of β-NaiPy. Lifetime measurements suggest bi-exponential decay and the average fluorescence lifetime varies from 1.4 to 6.8 ns. The spectroscopic properties are correlated with DFT and TD-DFT calculations in two complexes, Pd(β-NaiPy)X 2 (X = Cl, I) and they are compared with the free ligand results.

Shyh-chyun Yang – 2nd expert on this subject based on the ideXlab platform

  • peg 4000 promoted palladium catalyzed n allylation in water Aminonaphthalene as an example
    ChemInform, 2013
    Co-Authors: Chunjen Shih, Yi-jen Shue, Shiangyu Yang, Shyh-chyun Yang

    Abstract:

    Addition of polyethylene glycol 4000 provides a significant improvement of the recently published protocol for N-(mono)allylation of 1-Aminonaphthalene.

  • PEG‐4000‐Promoted Palladium‐Catalyzed N‐Allylation in Water: Aminonaphthalene as an Example.
    ChemInform, 2013
    Co-Authors: Chunjen Shih, Yi-jen Shue, Shiangyu Yang, Shyh-chyun Yang

    Abstract:

    Addition of polyethylene glycol 4000 provides a significant improvement of the recently published protocol for N-(mono)allylation of 1-Aminonaphthalene.

  • peg 4000 promoted palladium catalyzed n allylation in water Aminonaphthalene as an example
    Applied Organometallic Chemistry, 2012
    Co-Authors: Chunjen Shih, Yi-jen Shue, Shiangyu Yang, Shyh-chyun Yang

    Abstract:

    An environmentally friendly, efficient catalytic process using palladium associated with ligands in a PEG4000–water system leading to N-allylation was described in this study. PEG-4000 was found to improve the palladium-catalyzed allylic amination of allylic acetates with Aminonaphthalenes and gave overall good to high yields of the corresponding N-allylic Aminonaphthalenes. Copyright © 2012 John Wiley & Sons, Ltd.

Haruo Shizuka – 3rd expert on this subject based on the ideXlab platform

  • solvent dependent radiationless transitions of excited 1 Aminonaphthalene derivatives
    Journal of Physical Chemistry A, 1997
    Co-Authors: K Suzuki, H Tanabe, And Seiji Tobita, Haruo Shizuka

    Abstract:

    Photophysical parameters in the excited singlet states of a series of 1-Aminonaphthalene derivatives in cyclohexane, 3-methylpentane, and acetonitrile have been determined by means of time-resolved and steady-state fluorometry and time-resolved thermal lensing technique with the aid of MO calculations to elucidate the mechanism of internal fluorescence quenching of 1-Aminonaphthalenes observed in nonpolar media. It is revealed that (1) the radiationless processes in nonpolar solvents are mainly due to fast internal conversion (IC; Φic = 0.97, kic = 8.1 × 109 s-1 for N,N-dimethyl-1-Aminonaphthalene (DMAN) in cyclohexane at 293 K), (2) the fast IC occurs predominantly in the compounds having a pretwisted and flexible amino group with respect to the naphthalene ring, and the rate remarkably depends on temperature (the activation energy for the temperature dependent IC process of DMAN in 3-methylpentane is 5.1 kcal mol-1), indicating that the IC process is linked with an internal twisting motion of the amino …

  • Solvent-Dependent Radiationless Transitions of Excited 1-Aminonaphthalene Derivatives †
    Journal of Physical Chemistry A, 1997
    Co-Authors: K Suzuki, H Tanabe, And Seiji Tobita, Haruo Shizuka

    Abstract:

    Photophysical parameters in the excited singlet states of a series of 1-Aminonaphthalene derivatives in cyclohexane, 3-methylpentane, and acetonitrile have been determined by means of time-resolved and steady-state fluorometry and time-resolved thermal lensing technique with the aid of MO calculations to elucidate the mechanism of internal fluorescence quenching of 1-Aminonaphthalenes observed in nonpolar media. It is revealed that (1) the radiationless processes in nonpolar solvents are mainly due to fast internal conversion (IC; Φic = 0.97, kic = 8.1 × 109 s-1 for N,N-dimethyl-1-Aminonaphthalene (DMAN) in cyclohexane at 293 K), (2) the fast IC occurs predominantly in the compounds having a pretwisted and flexible amino group with respect to the naphthalene ring, and the rate remarkably depends on temperature (the activation energy for the temperature dependent IC process of DMAN in 3-methylpentane is 5.1 kcal mol-1), indicating that the IC process is linked with an internal twisting motion of the amino …