text: He has carried out an intense scientific activity in the fields of photochemistry, photophysics, electron transfer reactions, supramolecular chemistry, nanotechnology, machines and devices at the molecular level, photochemical conversion of solar energy. With its 650 publications cited more than 64,000 times in the scientific literature (H index 119), he is one of the best known chemists in the world. He is author or co-author of texts for researchers in English, some translated into Chinese and Japanese, which are currently adopted in universities in many countries. A few of the most significant texts are: Photochemistry of Coordination Compounds (1970), Supramolecular Photochemistry (1991), Molecular Devices and Machines - Concepts and Perspectives for the Nanoworld (2008), Energy for a Sustainable World (2011), Photochemistry and Photophysics: Concepts, Research, Applications (2014).