C60 molecular configurations leading to ferromagnetic exchange interactions in TDAE*C60

Systems and methods are provided for creating and using versions of a shared virtual card. In one example, a system for sharing stored value is provided. The system may include a virtual card manager configured to manage one or more shared virtual cards and a first computing device including a virtual card engine executable by a processor to manage the shared virtual card. The first computing device may be communicatively coupled to the virtual card manager via a network. In the example, stored value of the shared virtual card may be split between a first version and a second version. The first version may receive a first portion of the stored value and the second version may receive a second portion of the stored value; the first version available for use on the first computing device and the second version available for use on a second computing device.