Intercalation of an oxalatooxoniobate complex into layered double hydroxide and layered zinc hydroxide nitrate

Arízaga, Gregório Guadalupe Carbajal; Gardolinski, José Eduardo Ferreira da Costa; Schreiner, W. H.; Wypych, Fernando

doi:10.1016/j.jcis.2008.10.025

Cited by 70 publications

(38 citation statements)

References 26 publications

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“…The broadening of this band is due to hydrogen-bond formation [21]. The band at 1384 cm À1 is assigned to the v 3 stretching vibration of the NO À 3 groups in the LDH interlayer [22,23]. The band at approximately 428 cm À1 is due to the O-M-O vibrations in the brucite-like layers [22,24], while the band at 600 cm À1 is attributed to the lattice vibration modes of the translational vibration of Zn-OH [25].…”

Section: Samplementioning

confidence: 99%

“…The band at 1384 cm À1 is assigned to the v 3 stretching vibration of the NO À 3 groups in the LDH interlayer [22,23]. The band at approximately 428 cm À1 is due to the O-M-O vibrations in the brucite-like layers [22,24], while the band at 600 cm À1 is attributed to the lattice vibration modes of the translational vibration of Zn-OH [25]. The bands at approximately 826 and 1763 cm À1 are due to stretching modes that confirmed the presence of NO À 3 groups in the LDH interlayer with D 3h symmetry [22,23].…”

Section: Samplementioning

confidence: 99%

“…The band at approximately 428 cm À1 is due to the O-M-O vibrations in the brucite-like layers [22,24], while the band at 600 cm À1 is attributed to the lattice vibration modes of the translational vibration of Zn-OH [25]. The bands at approximately 826 and 1763 cm À1 are due to stretching modes that confirmed the presence of NO À 3 groups in the LDH interlayer with D 3h symmetry [22,23]. The band at 1622 cm À1 indicates the bending vibration of the interlayer water molecules [25].…”

Section: Samplementioning

confidence: 99%

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Improvement of the crystallinity and photocatalytic property of zinc oxide as calcination product of Zn–Al layered double hydroxide

Ahmed

Talib

Hussein

et al. 2012

Journal of Alloys and Compounds

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Section: Samplementioning

confidence: 99%

Section: Samplementioning

confidence: 99%

Section: Samplementioning

confidence: 99%

See 1 more Smart Citation

Improvement of the crystallinity and photocatalytic property of zinc oxide as calcination product of Zn–Al layered double hydroxide

Ahmed

Talib

Hussein

et al. 2012

Journal of Alloys and Compounds

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“…It was found that the release is very rapid for the first 5 minutes with 15% release at pH 7.4 compared with 40% at pH 4.8. This phenomenon is presumably due to the "burst effect" 34 and other mechanisms, depending on the acidity of the media. The burst effect occurs due to the high release of cetirizine anions at the first start (about 3% w/w) adsorbed on the ZLH surface, a conservative estimate from the observed pure phase powder X-ray diffraction pattern of the nanocomposite.…”

Section: Release Behavior Of Cetirizinementioning

confidence: 99%

Controlled-release formulation of antihistamine based on cetirizine zinc-layered hydroxide nanocomposites and its effect on histamine release from basophilic leukemia (RBL-2H3) cells

Hasan¹,

Ali²,

Al‐Qubaisi³

et al. 2012

IJN

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Abstract:A controlled-release formulation of an antihistamine, cetirizine, was synthesized using zinc-layered hydroxide as the host and cetirizine as the guest. The resulting well-ordered nanolayered structure, a cetirizine nanocomposite "CETN," had a basal spacing of 33.9 Å, averaged from six harmonics observed from X-ray diffraction. The guest, cetirizine, was arranged in a horizontal bilayer between the zinc-layered hydroxide (ZLH) inorganic interlayers. Fourier transform infrared spectroscopy studies indicated that the intercalation takes place without major change in the structure of the guest and that the thermal stability of the guest in the nanocomposites is markedly enhanced. The loading of the guest in the nanocomposites was estimated to be about 49.4% (w/w). The release study showed that about 96% of the guest could be released in 80 hours by phosphate buffer solution at pH 7.4 compared with about 97% in 73 hours at pH 4.8. It was found that release was governed by pseudo-second order kinetics. Release of histamine from rat basophilic leukemia cells was found to be more sensitive to the intercalated cetirizine in the CETN compared with its free counterpart, with inhibition of 56% and 29%, respectively, at 62.5 ng/mL. The cytotoxicity assay toward Chang liver cells line show the IC 50 for CETN and ZLH are 617 and 670 μg/mL, respectively.

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“…6,7 There have been a number of recent reports of ZLH compounds with beneficial intercalated organic anions, such as 4-(2,4-dichlorophenoxybutyrate), 8 orange G, 9,10 benzoic acid, 11 succinic acid, glutaric acid and adipic acid, 12 sodium heptanoate, 13 organometallic compounds, such as iron(III) porphyrin, 14 and complex compounds, such as oxalatooxoniobate complex. 15 Hippuric acid (N-benzyl glycin) is obtained from the urine of domestic animals and humans. It is synthesized in the liver as a derivative of glycin, a metabolite of benzoic acid urinary excretion.…”

Section: Introductionmentioning

confidence: 99%

Preparation of hippurate-zinc layered hydroxide nanohybrid and its synergistic effect with tamoxifen on HepG2 cell lines

Ali

Al‐Qubaisi²,

Hussein³

et al. 2011

IJN

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Background: A new simple preparation method for a hippurate-intercalated zinc-layered hydroxide (ZLH) nanohybrid has been established, which does not need an anion-exchange procedure to intercalate the hippurate anion into ZLH interlayers. Methods: The hippuric acid nanohybrid (HAN) was prepared by direct reaction of an aqueous suspension of zinc oxide with a solution of hippuric acid via a one-step method. Results:The basal spacing of the nanohybrid was 21.3 Å, indicating that the hippurate anion was successfully intercalated into the interlayer space of ZLH, and arranged in a monolayer fashion with the carboxylate group pointing toward the ZLH inorganic interlayers. A Fourier transform infrared study confirmed the formation of the nanohybrid, while thermogravimetry and differential thermogravimetry analyses showed that the thermal stability of the nanohybrid was markedly enhanced. The loading of hippurate in the nanohybrid was estimated to be about 38.7% (w/w), and the release of hippurate from the nanohybrid was of a controlled manner, and therefore the resulting material was suitable for use as a controlled-release formulation. HAN has synergistic properties with tamoxifen toward a HepG2 cell line, with an IC 50 value of 0.35 compared with hippurate. In the antiproliferative assay, the ratio of viable cells account for cells treated by the combination tamoxifen with HAN to untreated cells was sharply reduced from 66% to 13% after 24 and 72 hours, respectively. Conclusion: The release of hippuric acid anions from HAN occurred in a controlled manner, and the resulting material is suitable for a controlled-release formulation.

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Intercalation of an oxalatooxoniobate complex into layered double hydroxide and layered zinc hydroxide nitrate

Cited by 70 publications

References 26 publications

Improvement of the crystallinity and photocatalytic property of zinc oxide as calcination product of Zn–Al layered double hydroxide

Improvement of the crystallinity and photocatalytic property of zinc oxide as calcination product of Zn–Al layered double hydroxide

Controlled-release formulation of antihistamine based on cetirizine zinc-layered hydroxide nanocomposites and its effect on histamine release from basophilic leukemia (RBL-2H3) cells

Preparation of hippurate-zinc layered hydroxide nanohybrid and its synergistic effect with tamoxifen on HepG2 cell lines

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