TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Components: The assembly further comprises: at least one storage tank for water, particularly distilled and/or deionized water to provide water for the electrolyzer; at least one storage tank for oxygen, or air to provide oxygen or air to the fuel cell; at least a second storage tank for storage of at least partially dehydrated substrate in the second chemical reactor; and at least one electric motor for the conversion of released energy in the fuel cell into mechanical motion of a ship. The electrolyzer is connected to the fuel cell on the first chemical reactor, the first storage tank and the second chemical reactor. The second storage tank connects to the first chemical reactor via a cable. The substrate is at least partially hydrogenated in the first chemical reactor at 50-180 degrees C and at a pressure of 2-200 bar in the presence of a catalyst. The hydrogenated substrate in the second chemical reactor is at least partially dehydrated at 120-250 degrees C and at normal pressure in the presence of a catalyst. Preferred Method: The dehydrated substrate of the second chemical reactor is recycled via the first storage tank and/or the second storage tank into the first chemical reactor. The electrolyzer is derived of water required from the storage tank for storage of water and/or is transferred in the fuel cell during the oxidation of hydrogen water produced in the electrolyzer. The electrolyzer is derived of water required from the storage tank for storage of water and/or is transferred in the fuel cell during the oxidation of hydrogen water produced in the electrolyzer. The oxidation of hydrogen in the fuel cell supplies required oxygen from the storage tank for the storage of oxygen or air. Additional electric power when needed is fed from a further energy source into the electric network of the ship.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The substrate is polycyclic aromatic hydrocarbons polycyclic heteroaromatic hydrocarbons, and/or pi -conjugated organic polymers. The substrate is fused heteroaromatic hydrocarbon with nitrogen, sulfur or oxygen, which are optionally substituted. The fused heteroaromatic hydrocarbons are 6-30 carbons containing hydrocarbons, preferably 12 carbons containing hydrocarbons. The heteroatoms are substituted with at least one alkyl group, at least one aryl group, at least one alkenyl group, at least one alkynyl group, at least one cycloalkyl group and/or at least one cycloalkylene group, preferably 2-5C alkyl. The substrate is N-ethylcarbazole, N-propylcarbazole or N-isopropylcarbazole. The substrate contains an additive which increases the density of the substrate to 1 g/ml.