UV–vis spectroscopy and colorimetric models for detecting anthocyanin-metal complexes in plants: An overview of in vitro and in vivo techniques

Fedenko, V. S.; Shemet, Sergiy A.; Landi, Marco

doi:10.1016/j.jplph.2017.02.001

Cited by 96 publications

(73 citation statements)

References 94 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such a band, not evident in this study but reported in our previous study with Mt-added acerola juice (Ribeiro et al, 2018), is ascribed to complexation of anthocyanins with metals such as iron (Buchweitz et al, 2012). Since the color instability of anthocyanins at weakly acid to neutral pH is ascribed to the hydration of flavylium cation producing the colorless pseudobase, complexation has been demonstrated to improve the pigment stability (Fedenko et al, 2017;Yoshida et al, 2009). Trivalent metal ions have been demonstrated to be especially effective to complex to anthocyanins, due to their higher electron density when compared to divalent cations (Sigurdson et al, 2016).…”

Section: Ftir Spectrasupporting

confidence: 43%

“…Whereas intercalated composites (in which the platelets keep an ordered configuration) are characterized by increased basal spacing when compared to pristine Mt (the diffraction peak shifting to lower angles), the absence of diffraction peaks (as in this study) suggests the formation of exfoliated composites, in which the platelets were separated (Zheng et al, 2002;Mahmoudian et al, 2012;Mu et al, 2013), although it is not possible to affirm exfoliation without proper transmission electron micrographs, which were not carried out. So, it is supposed that the anthocyanins were immobilized on the external surface of the Mt, as suggested by Ogawa et al (2017), or that metals such as Fe 3+ , and Al 3+ have formed complexes to anthocyanins (Fedenko et al, 2017;Oyama et al, 2015;Sigurdson et al, 2016), or even promoted stacking or self-association of anthocyanins (Schreiber et al, 2010).…”

Section: X-ray Diffractograms (Xrd)mentioning

confidence: 99%

See 1 more Smart Citation

Montmorillonite as a reinforcement and color stabilizer of gelatin films containing acerola juice

Ribeiro

Brito

Filho

et al. 2018

Applied Clay Science

View full text Add to dashboard Cite

Montmorillonite (Mt) is well known as reinforcing agent in films. Moreover, it stabilizes anthocyanin pigments. In this study, Mt has been added as both reinforcement and color stabilizer to gelatin films containing acerola juice. Films were produced with different Mt concentrations (0-6.5% on gelatin). Increasing Mt contents resulted in enhanced tensile strength and modulus, although the elongation has been decreased. Mt also reduced the water vapor permeability in up to 45%. Mt presented two effects on film color: first, it changed its color from yellowish to red; and second, it stabilized film color throughout storage, mainly when added at 3.9%. It has been suggested that metals from Mt (such as Fe 3+ or Al 3+) may have formed complexes to anthocyanins, changing and stabilizing their color.

show abstract

Section: Ftir Spectrasupporting

confidence: 43%

Section: X-ray Diffractograms (Xrd)mentioning

confidence: 99%

Montmorillonite as a reinforcement and color stabilizer of gelatin films containing acerola juice

Ribeiro

Brito

Filho

et al. 2018

Applied Clay Science

View full text Add to dashboard Cite

show abstract

“…The ability of B to chelate to cyanidine-3-glucoside has been proved in vitro (data not published) by the evaluation of the bathochromic shift and the hypochromic effect which is caused by the formation of B-anthocyanin adduct when boric acid is added to a cyanidine-3-glucoside solution. UV-vis spectroscopy and colorimetric models for detecting anthocyanin-metal complexes are described by (Fedenko et al 2017).…”

Section: Polyols Phenolics and B Toxicity: Which Ameliorative Role?mentioning

confidence: 99%

Boron toxicity in higher plants: an update

Landi

Margaritopoulou

Papadakis

et al. 2019

Planta

Self Cite

159

View full text Add to dashboard Cite

show abstract

“…Trivalent cations (Al, Fe, Cr) complexes with anthocyanins and its derivatives resulted in a stronger decrease in absorbance than Mg 2þ (Sigurdson et al, 2016). While an increase in absorbance intensity could be due to band broadening resulting from the superposition of un-associated and chelate form of the NOM, a decrease in absorbance intensity could also be due to a decrease in the energy needed to cause light-induced electron transition in a chromophore, shifting the absorption maximum to a longer wavelength (Fedenko et al, 2017). The spectral modification observed in the absorption spectra upon metal complexation is very difficult to explain in term of binding sites.…”

Section: Electronic Spectral Changesmentioning

confidence: 99%

Natural organic matter-cations complexation and its impact on water treatment: A critical review

et al. 2019

View full text Add to dashboard Cite

a b s t r a c tThe quality and quantity of natural organic matter (NOM) has been observed to evolve which poses challenges to water treatment facilities. Even though NOM may not be toxic itself, its presence in water has aesthetic effects, enhances biological growth in distribution networks, binds with pollutants and controls the bioavailability of trace metals. Even though NOM has heterogeneous functional groups, the predominant ones are the carboxyl and the phenolic groups, which have high affinities for metals depending on the pH. The properties of both the NOM and the trace elements influence the binding kinetics and preferences. Ca 2þ prefers to bind with the carboxylic groups especially at a low pH while Zn 2þ prefers the amine groups though practically, most cations bind to several functions groups. The nature of the chemical environment (neighboring ligands) the ligand finds itself equally influences its preference for a cation. The presence of NOM, cations or a complex of NOM-cations may have significant impact on the efficiency of water processes such as coagulation, adsorption, ion exchange resin and membrane filtration. In coagulation, the complexation between the coagulant salts and NOM helps to remove NOM from solution. This positive influence can further be enhanced by the addition of Ca 2þ . A negative influence is however, observed in lime-softening method as NOM complexes with Ca 2þ . A negative influence is also seen in membrane filtration where divalent cations partially neutralize the carboxyl functional groups of NOM thereby reducing the repulsion effect on NOM and increasing membrane fouling. The formation of disinfection by-products could either be increased or reduced during chlorination, the speciation of products formed is modified with generally the enhancement of haloacetic acid formation observed in presence of metal cations. This current work, presents in details the interactions of cations and NOM in the environment, the preference of cations for each functional group and the possible competition between cations for binding sites, as well as the possible impacts of the presence of cations, NOM, or their complex on water treatment processes.

show abstract

UV–vis spectroscopy and colorimetric models for detecting anthocyanin-metal complexes in plants: An overview of in vitro and in vivo techniques

Cited by 96 publications

References 94 publications

Montmorillonite as a reinforcement and color stabilizer of gelatin films containing acerola juice

Montmorillonite as a reinforcement and color stabilizer of gelatin films containing acerola juice

Boron toxicity in higher plants: an update

Natural organic matter-cations complexation and its impact on water treatment: A critical review

Contact Info

Product

Resources

About