Preparation of an anion dye intercalated into layered double hydroxides and its controllable luminescence properties

Sun, Zhiyong; Liu, Jin; Shi, Wenying; Wei, Min; Duan, Xue

doi:10.1016/j.cej.2010.04.031

Cited by 57 publications

(25 citation statements)

References 36 publications

(37 reference statements)

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“…The FTIR spectrum of Mg/Al-LDH ( Figure 3B) shows a strong absorption band at 1385 cm -1 that can be attributed to the stretching vibration of NO 3 -. 40 In the lowfrequency region, the absorption peaks indicate that the lattice vibration modes can be attributed to M-O and O-M-O at 610 and 837 cm -1, respectively. 41 In the FTIR spectrum of pristine protocatechuic acid ( Figure 3A), there is a stretching vibration band for the OH group at 3202 cm -1 .…”

Section: Infrared Spectroscopymentioning

confidence: 99%

Preparation and controlled-release studies of a protocatechuic acid-magnesium/aluminum-layered double hydroxide nanocomposite

Barahuie¹,

Hussein²,

Hussein‐Al‐Ali³

et al. 2013

IJN

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Abstract:In the study reported here, magnesium/aluminum (Mg/Al)-layered double hydroxide (LDH) was intercalated with an anticancer drug, protocatechuic acid, using ionexchange and direct coprecipitation methods, with the resultant products labeled according to the method used to produce them: "PANE" (ie, protocatechuic acid-Mg/Al nanocomposite synthesized using the ion-exchange method) and "PAND" (ie, protocatechuic acid-Mg/Al nanocomposite synthesized using the direct method), respectively. Powder X-ray diffraction and Fourier transform infrared spectroscopy confirmed the intercalation of protocatechuic acid into the inter-galleries of Mg/Al-LDH. The protocatechuic acid between the interlayers of PANE and PAND was found to be a monolayer, with an angle from the z-axis of 8° for PANE and 15° for PAND. Thermogravimetric and differential thermogravimetric analysis results revealed that the thermal stability of protocatechuic acid was markedly enhanced upon intercalation. The loading of protocatechuic acid in PANE and PAND was estimated to be about 24.5% and 27.5% (w/w), respectively. The in vitro release study of protocatechuic acid from PANE and PAND in phosphate-buffered saline at pH 7.4, 5.3, and 4.8 revealed that the nanocomposites had a sustained release property. After 72 hours incubation of PANE and PAND with MCF-7 human breast cancer and HeLa human cervical cancer cell lines, it was found that the nanocomposites had suppressed the growth of these cancer cells, with a half maximal inhibitory concentration of 35.6 μg/mL for PANE and 36.0 μg/mL for PAND for MCF-7 cells, and 19.8 μg/mL for PANE and 30.3 μg/mL for PAND for HeLa cells. No half maximal inhibitory concentration for either nanocomposite was found for 3T3 cells.

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Section: Infrared Spectroscopymentioning

confidence: 99%

Preparation and controlled-release studies of a protocatechuic acid-magnesium/aluminum-layered double hydroxide nanocomposite

Barahuie¹,

Hussein²,

Hussein‐Al‐Ali³

et al. 2013

IJN

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“…Intercalation of organic chromophores in LDHs can improve their thermo-andp hotostability. [19][20][21][22] Alterations in opticalp roperties occur due to guest-guest interactions andt he fact that the host-guest interaction can cause the embedded molecules to adopt highly anisotropic arrangements. Fore xample, intermolecular interactions between intercalated dye anions frequently result in ar ed-shift of the fluorescence emission maxima when compared with the maxima of the free dyes in solution.…”

Section: Introductionmentioning

confidence: 99%

An Indigo Carmine‐Based Hybrid Nanocomposite with Supramolecular Control of Dye Aggregation and Photobehavior

Costa

Gomes

Pillinger

et al. 2015

Chemistry A European J

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Zn-Al layered double hydroxides (LDHs) containing solely indigo carmine (IC) or 1-hexanesulfonate (HS) anions, or a mixture of the two with different HS/IC molar ratios, were prepared by the direct synthesis method and characterized by various techniques. Hydrotalcite-type phases were obtained with basal spacings of 17.6 Å for the LDH intercalated by IC (IC-LDH) and 18.2-18.3 Å for the other materials containing HS. From the basal spacing for IC-LDH and UV/Vis spectroscopic data, it is proposed that the dye molecules assemble within the interlayer galleries to form a J-type stacking arrangement. A comprehensive electronic spectral and photophysical study was undertaken for IC in solution and all materials, aiming to obtain a detailed characterization of the host-guest and guest-guest interactions. In solution (the solvent surrounded "isolated" molecule), IC presents a fast excited state proton transfer with rate constants of ∼1.2-1.4×10(11) s(-1) , which is linked to the very efficient radiationless deactivation channel. In the solid state it is shown that incorporation of IC within the LDH decreases the level of aggregation, and that further addition of HS induces the appearance of isolated IC units within the LDH galleries. The indigo carmine-based nanocomposites reported constitute a step forward in the design of hybrid materials with tunable properties.

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“…As can be seen in the Gd NO 3 3 spectrum (Fig. 5a), the OH stretching vibration bands are observed at 3453 and 3187 cm −1 (Bi et al 2014), H 2 O bending vibration is at 1650 cm −1 (Eisenberg and Kauzmann 2005); the NO 3 -stretching vibrations are at 1444 and 1314 cm −1 (Sun et al 2010). In the Mg/Al-LDH spectrum in Fig.…”

Section: Fourier-transformed Infrared Spectroscopymentioning

confidence: 73%

Synthesis and characterization of protocatechuic acid-loaded gadolinium-layered double hydroxide and gold nanocomposite for theranostic application

et al. 2018

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A theranostic nanocomposite was developed using anticancer agent, protocatechuic acid (PA) and magnetic resonance imaging (MRI) contrast agent gadolinium nitrate (Gd) for simultaneous delivery using layered double hydroxide (LDH) as the delivery agent. Gold nanoparticles (AuNPs) were adsorbed on the surface of the LDH, which served as a complementary contrast agent. Based on the concept of supramolecular chemistry (SPC) and multimodal delivery system (MDS), the PA and Gd guests were first intercalated into the LDH host and subsequently AuNPs were surface adsorbed as the third guest. The nanohybrid developed was named MAPGAu. The MAPGAu was exposed to various characterizations at different stages of synthesis, starting with XRD analysis, which was used to confirm the intercalation episode and surface adsorption of the guest molecules. Consequently, FESEM, Hi-TEM, XRD, ICP-OES, CHNS, FTIR and UV-Vis analyses were done on the nanohybrids. The result of XRD analysis indicated successful intercalation of the Gd and PA as well the adsorption of AuNPs. The UV-Vis release study showed 90% of the intercalated drug was released at pH 4.8, which is the pH of the cancer cells. The FESEM and TEM micrographs obtained equally confirmed the formation of MAGPAu nanocomposite, with AuNPs conspicuously deposited on the LDH surface. The cytotoxicity study of the nanohybrid also showed insignificant toxicity to normal cell lines and significant toxicity to cancer cell lines. The developed MAGPAu nanocomposite has shown prospects for future theranostic cancer treatment.

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Preparation of an anion dye intercalated into layered double hydroxides and its controllable luminescence properties

Cited by 57 publications

References 36 publications

Preparation and controlled-release studies of a protocatechuic acid-magnesium/aluminum-layered double hydroxide nanocomposite

Preparation and controlled-release studies of a protocatechuic acid-magnesium/aluminum-layered double hydroxide nanocomposite

An Indigo Carmine‐Based Hybrid Nanocomposite with Supramolecular Control of Dye Aggregation and Photobehavior

Synthesis and characterization of protocatechuic acid-loaded gadolinium-layered double hydroxide and gold nanocomposite for theranostic application

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