Read Out and Coherent Manipulation of an Isolated Nuclear Spin : Using a Single Molecule Magnet Spin Transistor This thesis sheds new light on the worldwide first electrical manipulation of a single nuclear spin. Over the last four decades the size of a bit the smallest logical unit in a computer has decreased by more than two orders of magnitude and will soon reach a limit where quantum phenomena become important. Inspired by the power of quantum mechanics researchers have already identified pure quantum systems having analog to a classical bit two controllable and readable states. In this regard the inherent spin of electrons or nuclei with its two eigenstates spin up and spin down is a promising candidate. Using expertise in the field of single molecule magnets the author developed a molecular transistor which allows quantum information to be written onto a single nuclear spin by means of an electric field only and in addition enables the electronic read out of this quantum state. This novel approach opens a path to addressing and manipulating individual nuclear spins within a very confined space (a single molecule) at high speed. Thus the author was able to show that single molecule magnets are promising candidates for quantum information processing which is triggering a new field of research towards molecular quantum electronics. Introduction Single Electron Transistor Magnetic Properties of TbPc2 Experimental Details Single Molecule Magnet Spin Transistor Nuclear Spin Dynamics T1 Nuclear Spin Dynamics – T*2 Conclusion and Outlook.