IR spectroscopic studies of some cobalamins

Rajoria, D. S.; Nath, Amar

doi:10.1016/0022-1902(77)80372-2

Cited by 11 publications

(3 citation statements)

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“…As can be seen from Figure 8(a), one band appears at 2135 cm -1 (band A), a second at 1666 cm -1 (band B), and a third at 1572 cm -1 (band C), as originally observed in the solid-state spectrum by Rajoria and Nath. 36 A fourth band of very low intensity, reportedly observed at 1547 cm -1 (band D), was not observed in the present study. Comparing Figures 8(a) and 8(b), it is observed that band A located at 2135 cm -1 nearly disappeared.…”

Section: Investigation Of Reaction Kineticscontrasting

confidence: 76%

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TiO2-assisted Photocatalytic Degradation of Vitamin B12 in Aqueous Solution:Influencing Factors, Kinetics, and Reaction Investigations

et al. 2011

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The photodegradation (λ＝365 nm) of the biomolecule vitamin B 12 , catalyzed by the photocatalyst TiO 2 nanoparticles (NPs), has been investigated in aqueous suspension. The photodegradation process of vitamin B 12 has been monitored by means of electronic absorption (Abs), Fourier-transform infrared (FT-IR), and resonance Raman (RR) spectroscopies, respectively. The results show that only under UV illumination in the presence of TiO 2 is there effective degradation, and the photocatalytic degradation of vitamin B 12 is strongly influenced by the amount of TiO 2 NPs, the pH, and the initial concentration of vitamin B 12 . The photocatalytic reaction kinetics of vitamin B 12 conforms to a Langmuir-Hinshelwood isotherm model. Changes involving the three structural units of the carbon-metal bond C-Co, the organic corrin macrocycle combined with the benzimidazole nucleotide, and the inorganic CN in the vitamin B 12 molecule during the photocatalytic degradation are also discussed.

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Section: Investigation Of Reaction Kineticscontrasting

confidence: 76%

“…The variation of band C in the vitamin B 12 structure is consistent with a corrin ring mode. 36 Band C is sensitive to the vitamin B 12 structure. Furthermore, the changes in frequency of this band are not solely due to steric effects of the axial ligands.…”

Section: Investigation Of Reaction Kineticsmentioning

confidence: 99%

TiO2-assisted Photocatalytic Degradation of Vitamin B12 in Aqueous Solution:Influencing Factors, Kinetics, and Reaction Investigations

et al. 2011

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“…The first measurements of vitamin B12 using Raman spectroscopy appeared in 1973 (112,113), where the Raman spectrum of vitamin B12 (shown in Figure 6) was identified and the technique is used to identify vitamin B12 and its derivatives in aqueous solutions (114)(115)(116). This is followed by a long hiatus until 1989, where more detailed Raman studies of vitamin B12 start emerging (117,118) as laser sources and detectors improved.…”

Section: Raman Spectroscopymentioning

confidence: 99%

Measuring and tracking vitamin B12: A review of current methods with a focus on optical spectroscopy

Tsiminis

Schartner

Brooks

et al. 2016

Applied Spectroscopy Reviews

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Vitamin B12 deficiency has been associated with an increased risk of cognitive decline. This literature review explores the current methods available for measuring vitamin B12 in human blood, serum, and urine, and the need for a globally accepted reference range for vitamin B12. We present optical spectroscopy, including chemiluminescence measurements, absorption and fluorescence spectroscopy, surface plasmon resonance, and Raman spectroscopy, as a promising technique for detection and tracking of vitamin B12. Considerations for future research are highlighted, including enhancing the sensitivity of optical spectroscopy and prospective pathways to improve the reproducibility, selectivity, and speed of vitamin B12 detection.

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B₁₂and Related Organocobalt Chemistry: Formation and Cleavage of Cobalt Carbon Bonds

Toscano¹,

Marzillï²

1984

Progress in Inorganic Chemistry

144

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IR spectroscopic studies of some cobalamins

Cited by 11 publications

References 5 publications

TiO2-assisted Photocatalytic Degradation of Vitamin B12 in Aqueous Solution:Influencing Factors, Kinetics, and Reaction Investigations

TiO2-assisted Photocatalytic Degradation of Vitamin B12 in Aqueous Solution:Influencing Factors, Kinetics, and Reaction Investigations

Measuring and tracking vitamin B12: A review of current methods with a focus on optical spectroscopy

B₁₂and Related Organocobalt Chemistry: Formation and Cleavage of Cobalt Carbon Bonds

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IR spectroscopic studies of some cobalamins

Cited by 11 publications

References 5 publications

TiO2-assisted Photocatalytic Degradation of Vitamin B12 in Aqueous Solution:Influencing Factors, Kinetics, and Reaction Investigations

TiO2-assisted Photocatalytic Degradation of Vitamin B12 in Aqueous Solution:Influencing Factors, Kinetics, and Reaction Investigations

Measuring and tracking vitamin B12: A review of current methods with a focus on optical spectroscopy

B12and Related Organocobalt Chemistry: Formation and Cleavage of Cobalt Carbon Bonds

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B₁₂and Related Organocobalt Chemistry: Formation and Cleavage of Cobalt Carbon Bonds