This book presents new developments in chromophore research. Topics discussed include boron-Dipyrromethane (BODIPY) chromophores; a chromophoric test for quantifying cholesterol and major polyunsaturated fatty acids in food and biological samples; structural characterisation of heterometallic PtAg, PtAu, and PtCu complexes; the reduction of Re chromophores attached to polymeric backbones by electrochemical and pulse radiolysis techniques; development of H-shaped two-dimensional conjugated oligomers as functional chromophores and fluorophores; design of chromophores for photoinitiators of polymerization; phytochrome-chromophore biosynthesis and chloroplast development; and efficient plastic scintillators with luminescent Eu complexes.