Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata - CONICET, Sucursal 4, Casilla de Correo 16, 1900 La Plata, Argentina.
Departamento de Química Inorgánica, Analítica y Química Física, INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, Buenos Aires C1428EHA, Argentina.
Phys Chem Chem Phys. 2020 Apr 8;22(14):7440-7450. doi: 10.1039/d0cp00077a.
Polyamine-salt aggregates have become promising soft materials in nanotechnology due to their easy preparation process and pH-responsiveness. Here, we report the use of hexacyanoferrate(ii) and hexacyanoferrate(iii) as electroactive crosslinking agents for the formation of nanometer-sized redox-active polyamine-redox-salt aggregates (rPSA) in bulk suspension. This nanoplatform can be selectively assembled or disassembled under different stimuli such as redox environment, pH and ionic strength. By changing the charge of the building blocks, external triggers allow switching the system between two phase states: aggregate-free solution or colloidal rPSA dispersion. The stimuli-activated modulation of the assembly/disassembly processes opens a path to exploit rPSA in technologies based on smart nanomaterials.
聚胺-盐聚集体由于其制备过程简单和对 pH 值的响应性，已成为有前途的软物质材料。在这里，我们报告了使用亚铁氰化铁(ii)和亚铁氰化铁(iii)作为电活性交联剂，在体相悬浮液中形成纳米尺寸的氧化还原活性聚胺-氧化还原盐聚集体(rPSA)。这种纳米平台可以在不同的刺激下，如氧化还原环境、pH 值和离子强度下，选择性地组装或解组装。通过改变构建块的电荷，外部触发可以使系统在两种相态之间切换：无聚集体的溶液或胶体 rPSA 分散体。组装/解组装过程的刺激激活调节为利用基于智能纳米材料的技术开辟了一条途径。
