TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: M is bound to one or more heterocyles, halides, and pseudo-halides. Heterocycles are selected from pyrindine, imidazole, pyrazine, furan and thiophene. The pseudo-halides are selected from sulfonates and carboxylates. The sulfonates are trifluoromethanesulfonate groups and at the carboxylates are acetate groups. Dyes are directly attached to the metalloporphyrin scaffold or are attached via a linker, where linker comprises an alkyl or phenylene. Adjacent R groups are connected to form a cyclohexene ring, benzene ring, or its combination. The cycloalkyl or benzannulated ring system comprises porphyrins, where porphyrins comprise benzoporphyrins, naphthoporphyrins, and anthracenoporphyrins. The metalloporphyrin of Formula I comprises Formula II or its salts or tautomers. The multichromophoric assembly further comprises at least one triplet forming dopant material. The M facilitates intersystem crossing such that photons absorbed by the fluorophores are efficiently funneled to a porphyrin-based triplet state. The multichromophoric assembly comprises one platinum tetraphenyltetrabenzoporphyrin (Pt(TPBP)) core and four boron-dipyrromethene (M2BODIPY) moieties forming a shell in a core-shell arrangement, which exhibits energy transfer properties sufficient to funnel singlet to the core followed by triplet redistribution between the core and shell. There is energy transfer between at least one of Fl1, Fl2, Fl3 and Fl4 and the metalloporphyrin, or its combination. Energy transfer occurs via fluorescence resonance energy transfer (FRET). Preferred Definitions:    M=selected from Y, La, Zr, Hf, Nb, Ta, Mo, W, Tc, Re, Ru, Os, Rh, Ir, Pd, Pt, Ag, Au, Cd, Hg, Ga, Ge, In, Sn, Sb, Ti, Pb, Bi, lanthanides, and actinides; and    Fl1, Fl2, Fl3 and Fl4=each independently selected from boron dipyrrin, pyrene, fluorescein, and merocyanine-based dyes, or each 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene.    EXAMPLE - No suitable example given.