Spectroscopic characterization of some new model compounds that mimic coupled binuclear copper proteins and enzymes

Liao, Zhan Ru; Liu, C; Wang, Junguo; Zhang, T; Shi, Jun-Qing; Fan, Вt; Xiao, Ling

doi:10.1051/jcp/1995920668

Cited by 2 publications

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“…The ligand was prepared according to an improved method with ethylene glycol solvent [14,15]. To solution of NTB (0.815 g, 2 mmol) in absolute ethanol (25 mL) was added Mn(ClO 4 ) 2 Á 6H 2 O (0.730 g, 2 mmol) dissolved in water (3 mL).…”

Section: Synthesis Spectra and Crystal Structure Of A Dinuclear Mangmentioning

confidence: 99%

Synthesis, spectra and crystal structure of a dinuclear manganese(χ) complex [(NTB)Mn(μ-O)]₂(ClO₄)₄ · 2H₂O

Xiao

Liang

2008

Journal of Coordination Chemistry

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2008) Synthesis, spectra and crystal structure of a dinuclear manganese(χ) complex [(NTB)Mn(µ-O)] 2 (ClO 4 ) 4 · 2H 2 O, Journal of Coordination Chemistry, 61:3, 384-391To link to this article: http://dx.has been synthesized and characterized. The crystal structure is determined by single crystal X-ray diffraction. The compound crystallizes in the monoclinic system, space group C2/c with a ¼ 18.3461(1), b ¼ 15.4170(1), c ¼ 21.0141(1) Å , ¼ 90.5290(1) , V ¼ 5943.4(8) Å 3 , Z ¼ 4 and R 1 ¼ 0.0789 for 5729 observed reflections. Two manganese atoms are bridged by two oxygen atoms forming a dinuclear complex. The results of interaction between 1 and H 2 O 2 indicated that hydrogen peroxide destroyed the Mn 2 O 2 unit of 1.

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Section: Synthesis Spectra and Crystal Structure Of A Dinuclear Mangmentioning

confidence: 99%

Synthesis, spectra and crystal structure of a dinuclear manganese(χ) complex [(NTB)Mn(μ-O)]₂(ClO₄)₄ · 2H₂O

Xiao

Liang

2008

Journal of Coordination Chemistry

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“…For instance, it is unclear why the LMCT state of oxy Hc does not exhibit any observable room-temperature fluorescence emission, how the active-site chemistry is mediated by the surrounding protein environment, and if the dioxygen binding and dissociation mechanisms differ for arthropod and molluskan Hcs. Understanding how the protein environment influences the chemical and spectroscopic properties of the Hc metal center is an important issue in the field of bioinorganic chemistry because of the increasing interest in using the Hc active-site structure as a model for developing synthetic copper compounds that bind dioxygen for activation and transport reactions. − …”

Section: Introductionmentioning

confidence: 99%

Time-Resolved Spectroscopic Studies of Radiationless Decay Processes in Photoexcited Hemocyanins

Floyd

Haralampus-Grynaviski

et al. 2001

J. Phys. Chem. B

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Photoacoustic calorimetry and femtosecond transient absorption spectroscopic techniques have been used to study the electronic relaxation and ligand binding reactions that occur following photoexcitation of the 345 nm peroxide-to-copper ligand-to-metal charge transfer (LMCT) band of oxy hemocyanin (Hc) from Limulus polyphemus and Busycon canaliculatum. The results indicate that the LMCT state in both proteins decays to the ground state via a nonradiative mechanism with a time constant of ∼610 fs. The short lifetime of the LMCT state measured in this work provides an explanation for why the oxy Hc excited state exhibits a low fluorescence yield. The results also suggest that photoexcitation of oxy Hc leads to the dissociation of O2 (by a thermal or photochemical process) and that the O2 molecule subsequently recombines with the metal center on the 80 ps time scale. The time-resolved data reveal that the dynamics in the vicinity of the active site are identical for the two types of Hcs studied, which is consistent with the similarity of the active sites in various Hcs.

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Spectroscopic characterization of some new model compounds that mimic coupled binuclear copper proteins and enzymes

Cited by 2 publications

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Synthesis, spectra and crystal structure of a dinuclear manganese(χ) complex [(NTB)Mn(μ-O)]₂(ClO₄)₄ · 2H₂O

Synthesis, spectra and crystal structure of a dinuclear manganese(χ) complex [(NTB)Mn(μ-O)]₂(ClO₄)₄ · 2H₂O

Time-Resolved Spectroscopic Studies of Radiationless Decay Processes in Photoexcited Hemocyanins

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Spectroscopic characterization of some new model compounds that mimic coupled binuclear copper proteins and enzymes

Cited by 2 publications

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Synthesis, spectra and crystal structure of a dinuclear manganese(χ) complex [(NTB)Mn(μ-O)]2(ClO4)4 · 2H2O

Synthesis, spectra and crystal structure of a dinuclear manganese(χ) complex [(NTB)Mn(μ-O)]2(ClO4)4 · 2H2O

Time-Resolved Spectroscopic Studies of Radiationless Decay Processes in Photoexcited Hemocyanins

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Synthesis, spectra and crystal structure of a dinuclear manganese(χ) complex [(NTB)Mn(μ-O)]₂(ClO₄)₄ · 2H₂O

Synthesis, spectra and crystal structure of a dinuclear manganese(χ) complex [(NTB)Mn(μ-O)]₂(ClO₄)₄ · 2H₂O