Intercalation Study of Curcumin Into Zinc Layered Hydroxide

Abstract

Zinc layered hydroxide (ZLH) intercalated with curcumin was successfully prepared by ion exchange method. The synthesised nanocomposite was characterised by Powder X-ray diffraction (PXRD) and Fourier transform infrared spectroscopy (FTIR). The obtained intercalation compound, ZLH-curcumin nanocomposite (ZiCUR), showed a basal spacing of 10.0 Å when 0.01M of curcumin solution was used in the synthesis. The shifting in the stretching frequency of the curcumin anion provides strong evidence that the anion is bonded to the ZLH through electrostatic force. In FTIR, after intercalation, there is a noticeable shift of the O-H stretching vibrational bands. This is due to the formation of strong hydrogen bonds between curcumin and -OH groups in ZLH. Thus, this indicates that curcumin anions are present in the sample and were intercalated between positively charged ZLH layers, as indicated by the characteristics of PXRD pattern.Keywords: zinc layered hydroxide, curcumin, ion exchange method Abstrak Zink hidroksida berlapis (ZHB) disisip bersama kurkumin telah berjaya disediakan menggunakan kaedah pertukaran ion. Komposit nano yang telah di sintesis dicirikan menggunakan X-ray Serbuk Pembelauan dan Spektroskopi Infra Merah Transformasi Fourier. Sebatian interkalasi yang diperoleh iaitu komposit nano zink hidrosida berlapis-kurkumin, menunjukkan jarak basal sebanyak 10.0 Å apabila kepekatan 0.01M larutan kurkumin digunakan semasa proses sintesis. Perubahan pada frekuensi anion kurkumin menunjukkan bukti yang kukuh di mana anion telah dilekatkan kepada ZHB menggunakan daya elektrostatik. Melalui Spektroskopi Infra Merah Transformasi Fourier, selepas interkalasi, perubahan yang ketara pada O-H regangan jalur getaran dapat di lihat. Hal ini kerana, pembentukan ikatan hidrogen yang kuat antara kurkumin dan kumpulan -OH di dalam ZHB. Maka, ia menunjukkan bahawa anion kurkumin hadir di dalam sampel dan telah disisipkan antara lapisan ZHB yang bercas positif, seperti mana yang ditunjukkan oleh ciri -ciri corak Spektroskopi Infra Merah Transformasi Fourier.

Encapsulation of curcumin into layered double hydroxides improve their anticancer and antiparasitic activity

“…Several studies have shown that LDH are capable of adsorbing or encapsulating CUR, [ 1,23–28 ] and they have proven to be a potential system of CUR administration in an effective photodynamic therapy, [ 23,28 ] generating apoptosis and autophagy in tumour cells [ 26 ] and presenting antimicrobial activity in bacteria and candids. [ 24 ] However, it is not clear how the composition of the M +2 cation of LDH affects its properties and structure, nor how this influences its biological activity.…”