The goal of this interdisciplinary research project is to develop synthetic methods toward new types of dendrimers with tetrapyrrolic core and (indolo)carbazole dendrons, to reveal and analyse physical and chemical mechanisms of control of the luminescence response of dendrimers, and to create a basis for their resulting applications as molecular photonic devices. Combined efforts of synthetic chemists, spectroscopists and theoreticians from Western and Eastern Europe will be applied to achieve this aim. New types of dendrimers with tetrapyrrolic core possessing promising luminescent features, will be synthesized. Physical and chemical mechanisms of manipulation of their optical response will be revealed and analysed with using diverse spectroscopic approaches including steady-state and transient absorption, luminescence, fluorescence line narrowing, infra-red and Raman spectroscopies, luminescence microscopy and single molecule detection at ambient and low temperatures. The two-photon absorption spectroscopy will be applied for the design of infra-red light harvesting antennae and nonlinear optical devices. Theoretical methods will be applied to obtain the optimized molecular conformation of the dendrimers and to establish the pathways of the migration of excitation energy. The realization of this project will lead to the deeper understanding of fundamental processes of light energy transformation in supramolecular systems, which provides the basis for the design of efficient luminescent sensors and photonic devices that will be available for broad implementation.