Reversible chirality inversion of an AuAg-cysteine coordination polymer by pH change.

Responsive chiral systems have attracted considerable attention, given their potential for diverse applications in biology, optoelectronics, photonics, and related fields. Here we show the reversible chirality inversion of an AuAg-cysteine (AuAg-cys) coordination polymer (CP) by pH changes. The polymer can be obtained by mixing HAuCl and AgNO with L-cysteine (or D-cysteine) in appropriate proportions in HO (or other surfactant solutions).

Tailored Solution-Based N-heterotriangulene Thin Films: Unravelling the Self-Assembly.

The ability of a series of bridged triarylamines, so-called N-heterotriangulenes, to form multilayer-type 2D-extended films via a solution-based processing method was examined using complementary microscopic techniques. We found that the long-range order, crystallinity, and layer thickness decisively depend on the nature of the substituents attached to the polycyclic backbone. Owing to their flat core unit, compounds exhibiting a carbonyl unit at the bridge position provide a superior building block as compared to thioketone-bridged derivatives.