Investigation of the charge-transfer or donor-acceptor complexes using spectroscopy, Photophysical studies on some dyad and tryad systems as well as inorganic polymers for photonic applications, Photo-induced energy and photo-induced electron transfer in donor-acceptor systems including organic and organometallic polymers as well as nanomaterials, Characterization and study of ground-state and excited-state interaction in dyay systems using spectroscopic tools such as ground-state absorption, steady-state emission, flash photolysis and transient absorption spectroscopy