• Title/Summary/Keyword: Spectroscopic studies

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Spectroscopic, Thermal and Biological Studies of Zn(II), Cd(II) and Hg(II) Complexes Derived from 3-Aminopyridine and Nitrite Ion

  • Dhaveethu, Karuthakannan;Ramachandramoorthy, Thiagarajan;Thirunavukkarasu, Kandasamy
    • Journal of the Korean Chemical Society
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    • v.57 no.6
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    • pp.712-720
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    • 2013

  • Microwave assisted syntheses of Zn(II), Cd(II) and Hg(II) complexes with 3-aminopyridine (3AP) and nitrite ($NO_2{^-}$) ions have been reported. The metal complexes were characterized by elemental analyses, molar conductance, IR, Far-IR, electronic, NMR ($^1H$, $^{13}C$), thermal and electron impact mass spectral studies. The spectroscopic studies reveal the composition, the nature of nitrite ligand in the complexes, electronic transitions, chemical environments of C and H atoms thermal degradation of the complexes. On the basis of characterization data, distorted tetrahedral geometry is suggested for Zn(II), Cd(II) and Hg(II) complexes. The organic ligand (3AP) and their metal complexes were screened against gram negative pathogenic bacteria and fungi in vitro. The results are compared with our previous report J. Korean Chem. Soc. 2013, 57, 341 on 4-aminopyridine and nitrite ion complexes of the same metal ions.

  • https://doi.org/10.5012/jkcs.2013.57.6.712 인용 PDF KSCI KPUBS HTML

Ultrafast Time-Resolved Laser Spectroscopic Studies of trans-Bis(ferrocene-carboxylato)(tetraphenyl-porphyrinato)tin(IV): Intramolecular Electron-Transfer Dynamics

  • Jang, Joon-Hee;Kim, Hee-Jung;Kim, Hee-Joon;Kim, Chul-Hoon;Joo, Tai-Ha;Cho, Dae-Won;Yoon, Min-Joong
    • Bulletin of the Korean Chemical Society
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    • v.28 no.11
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    • pp.1967-1972
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    • 2007

  • Photophysical properties of a newly-synthesized porphyrin derivative, trans-bis(ferrocene carboxylato)- (5,10,15,20-tetraphenylporphyrinato)tin(IV) [Sn(TPP)(FcCOO)2] were investigated by means of steady-state and fs-time resolved laser spectroscopic techniques, and compared with those of a standard molecule, trans-dichloro( 5,10,15,20-tetraphenyl-porphrinato)tin(IV) [Sn(TPP)Cl2]. The fluorescence spectrum of Sn(TPP)- (FcCOO)2 was observed to exhibit dual emission bands originating from the S2-state and the S1-state, which was greatly quenched as compared to those of Sn(TPP)Cl2. The fs-time resolved fluorescence and transient absorption spectroscopic measurements revealed that the fluorescence quenching is due to formation of the long-lived charge transfer state by intramolecular electron transfer from ferrocene to the S2-excited SnTPP in addition to the enhanced non-radiative deactivation processes.

  • https://doi.org/10.5012/bkcs.2007.28.11.1967 인용 PDF KSCI