Electrostatic Assembly with Poly(ferrocenylsilanes)

Abstract

New frontiers in polymer science involve the incorporation of functional species into material systems. The electrostatic layer-by-layer (LBL) self-assembly technique constitutes a versatile tool for nano-and microscale fabrication of devices and novel material structures. Although a rapidly growing attention has been paid to this area, most of the studies conducted were based on organic polymeric electrolytes. Due to synthetic developments, new polymeric structures with inorganic elements and transition metals incorporated in the main chain have become accessible. With the development of new synthesis routes, organometallic poly(ferrocenylsilane) polycations and polyanions emerged. Their charged nature and water-solubility made them excellent candidates for the extension of electrostatic multilayer assembly to organometallic polymeric materials. The present review gives a concise summary on the LBL fabrication of organometallic thin films and microcapsules based on water-soluble poly(ferrocenylsilane) polyions. The unique functions of these structures come from the molecular structure of poly(ferrocenylsilanes), in which silicon atoms and redoxactive ferrocene units are present. In this context, the diverse application potentials of these organometallic multilayer structures are also discussed.

Disassembly of redox responsive poly(ferrocenylsilane) multilayers: The effect of blocking layers, supporting electrolyte and polyion molar mass

“…The thickness development during fabrication of the multilayer on ITO and Au coated glass substrates was monitored by cyclic voltammetry (CV), ellipsometry, quartz microbalance (QCM), and UV/Vis spectroscopy [14,[20][21][22]. PFS multilayers exhibit linear growth with an average thickness increase of 3 nm/bilayer on ITO substrate in dry state.…”

“…Since reversible redox processes affect the ferrocene group within its backbone, PFS is undergoing dramatic and reversible changes in physicochemical properties upon oxidation. Protocols for preparation of PFS polymers, with additional positive and negative charges [14], make those macromolecules suitable for a LbL fabrication.…”

“…Degradation of engineered LbL capsules upon exposure to a cellular concentration of glutathione was also presented [18]. Despite the studies aiming at the assembly and disassembly, as well as controlled molecular release from LbL prepared PFS films [8,14,[19][20][21], no systematic exploration was performed on various important aspects of electrochemically induced molecular behavior of PFS multilayers. Such a study would be indispensable for the design of smart platforms for molecular delivery applications.…”

Study on the preparation and properties of novel block copolymeric materials based on structurally modified organometallic as well as organic polyamides and polydimethylsiloxane

“…The development and multidisciplinary broadening of materials science necessitates the design and synthesis of new functional materials. 1 Polyamides are characterized as high performance materials with rigid rod-like structures, which are utilized in a wide range of applications due to their thermal and oxidative stability, excellent mechanical and dielectric properties besides their outstanding resistance to degradation by high energy particles, γ radiation and corrosive atmospheres. 2 Considerable research in recent years in the area of polyamide materials has been focused on improving their properties as well as enhancing their processability through the design and synthesis of new monomers.…”

A Novel Sensor Based on Layer‐by‐Layer Hybridized Phosphomolybdate and Poly(ferrocenylsilane) on a Cysteamine Modified Gold Electrode

“…PFS multilayers have been obtained by layer-by-layer technique [36]. Compared with PFS multiplayer, the POM-PFS multilayers modified electrode exhibited good electrocatalytic ability to a series of inorganic ions, including BrO , ascorbic acid and SO 2À 3 .…”