Binary Janus Porous Coordination Polymer Coatings for Sensor Devices with Tunable Analyte Affinity

摘要

Heterogeneous functional materials, in which multiple molecular architectures are combined at nano/meso/macro scales, have attracted significant attention because of the collective and nonlinear functionality of the entire systems, which are controlled by the active interactions of single components. The overall performance strongly depends on spatial configuration of single components as it was shown for block copolymers. Regarding binary systems of heterogeneous materials, two different symmetric arrangements are known: centrosymmetric and non-centrosymmetric materials (Figure 1). Besides the fact that a centrosymmetric core-shell configuration gives promising collective properties, as shown for different types of materials such as metal particles, metal oxides, or block copolymers, the absence of centro-symmetry can induce higher diversity and complexity in the system as seen in biological systems. However, the synthesis of non-centrosymmetric systems such as Janus materials is still challenging because of the complexity to control the assembly of building units in an anisotropic way.