TY - JOUR
T1 - Coordination-driven multistep assembly of metal-polyphenol films and capsules
AU - Rahim, Md Arifur
AU - Ejima, Hirotaka
AU - Cho, Kwun Lun
AU - Kempe, Kristian
AU - Müllner, Markus
AU - Best, James P.
AU - Caruso, Frank
PY - 2014/2/25
Y1 - 2014/2/25
N2 - We report the assembly of metal-polyphenol complex (MPC) films and capsules through the sequential deposition of iron(III) ions (Fe(III)) and a natural polyphenol, tannic acid (TA), driven by metal-ligand coordination. Stable Fe(III)/TA films and capsules were formed, indicating lateral and longitudinal cross-linking of TA by Fe(III) in the film structure. Quartz crystal microbalance, ultraviolet-visible (UV-vis) spectrophotometry, and X-ray photoelectron spectroscopy were carried out to quantitatively analyze the film growth. A comparison of the MPC capsules prepared through multistep assembly with those obtained through one-step deposition, as reported previously [Ejima et al., Science 2013, 341, 154-156], reveals substantial differences in the nature of complexation and in their physicochemical properties, including permeability, stiffness, and degradability. This study highlights the importance of engineering MPC films with different properties through implementing different assembly methods.
AB - We report the assembly of metal-polyphenol complex (MPC) films and capsules through the sequential deposition of iron(III) ions (Fe(III)) and a natural polyphenol, tannic acid (TA), driven by metal-ligand coordination. Stable Fe(III)/TA films and capsules were formed, indicating lateral and longitudinal cross-linking of TA by Fe(III) in the film structure. Quartz crystal microbalance, ultraviolet-visible (UV-vis) spectrophotometry, and X-ray photoelectron spectroscopy were carried out to quantitatively analyze the film growth. A comparison of the MPC capsules prepared through multistep assembly with those obtained through one-step deposition, as reported previously [Ejima et al., Science 2013, 341, 154-156], reveals substantial differences in the nature of complexation and in their physicochemical properties, including permeability, stiffness, and degradability. This study highlights the importance of engineering MPC films with different properties through implementing different assembly methods.
UR - http://www.scopus.com/inward/record.url?scp=84894648583&partnerID=8YFLogxK
U2 - 10.1021/cm403903m
DO - 10.1021/cm403903m
M3 - Article
AN - SCOPUS:84894648583
VL - 26
SP - 1645
EP - 1653
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 4
ER -