Acetylene bridged porphyrin–monophthalocyaninato ytterbium(iii) hybrids with strong two-photon absorption and high singlet oxygen quantum yield
Abstract
Several acetylene bridged porphyrin–monophthalocyaninato ytterbium(III) hybrids, PZn–PcYb, PH2–PcYb and PPd–PcYb, have been prepared and characterized by 1H and 31P NMR, mass spectrometry, and UV-vis spectroscopy. Their photophysical and photochemical properties, especially the relative singlet oxygen (1O2) quantum yields and the two-photon absorption cross-section (σ2), were investigated. These three newly synthesized compounds exhibited very large σ2 values and substantial 1O2 quantum yields upon photo-excitation, making them potential candidates as one- and two-photon photodynamic therapeutic agents.