All known iron-based superconductors comprise layers of FeAs or FeSe with some combination of group I, group II or lanthanide oxide layers, and usually some doping. To make progress, an entirely new synthetic paradigm is needed to incoroporate different ingredients and to be useful should produce dramatically enhanced superconducting properties. We have opened up just such a new avenue by use of a molecular ingredient, an approach which can now be exploited using the many possible adjustments of molecular species that have proved so effective in molecular magnets and superconductors. We use a lithiated ammonia solution to intercalate a molecular spacer layer into FeSe, raising Tc from 8 K to 43(1) K. This is the highest Tc so far reported for an iron chalcogenide. This muSR proposal will examine further new molecular intercalates and study the role of Li diffusion in this new material.