The synthesis of a new zwitterionic diblock copolymer poly(l-glutamic acid)-b-poly(l-lysine) (PGA-b-PLys) is described, and its self-assembly into schizophrenic vesicles that can reversibly be produced in moderate acidic or basic aqueous solutions is reported. These pH-sensitive nanoparticles are expected to be very promising candidates in macromolecular nanobiotechnologies.

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Antimony and bismuth ⟨111⟩ layered perovskites have recently attracted significant attention as possible, nontoxic alternatives to lead halide perovskites. Unlike lead halide perovskites, however, ⟨111⟩ halide perovskites have shown limited ability to tune their optical and electronic properties. Herein, we report on the metal alloying of manganese and copper into the family of materials with formula Cs 4 Mn 1−x Cu x Sb 2 Cl 12 (x = 0−1). By changing the concentration of manganese and copper, we show the ability to modulate the bandgap of this family of compounds over the span of 2 electron volts, from 3.0 to 1.0 eV. Furthermore, we show that in doing so, we can also adjust other relevant properties such as their magnetic behavior and their electronic structure.