• dendrimers;
  • dendritic boxes;
  • molecular rotors;
  • organic synthesis;
  • spectroscopy

In a coded self-assembly, a simple code is written in the molecule, which self-assembles the molecules into a fractal like structure, which acts as a seed for the next step. As the molecule turns into a complex seed, the code transforms into another form and several seeds self-assemble into another structure, which acts as a seed for the next step. Until now, this technology was considered as a prerogative of nature. Here, a dendritic network is used to write a basic code by synthetically attaching 32 molecular rotors and doping two controller molecules in its cavity. The code live, which is an energy transmission path in the molecule, is imaged. When the energy transmission path or code is triggered, a series of products generate one after another spontaneously. Two examples are: i) dendritic seed (5–6 nm)[RIGHTWARDS ARROW]paired nanowire (≈12 nm)[RIGHTWARDS ARROW]nanowire (≈200 nm)[RIGHTWARDS ARROW]microwire (500 nm)[RIGHTWARDS ARROW]wire like rod (1–2 μm)[RIGHTWARDS ARROW]jelly[RIGHTWARDS ARROW]rectangular sheet (5 μm). ii) dendritic seed[RIGHTWARDS ARROW]nano-sphere (20 nm)[RIGHTWARDS ARROW]micro-sphere (500 nm)[RIGHTWARDS ARROW]large balls(1 μm)[RIGHTWARDS ARROW]oval shape rod (5–10 μm)[RIGHTWARDS ARROW]Y, L or T shaped rod assembly. The energy level interactions are tracked using spectroscopy how exactly a directed energy transfer code generates multi-step synthesis from nano to the visible scale.