Abstract
Phthalocyanine (Pc) molecules have been investigated as photosensitizers (PS) for singlet oxygen (1O2) generation because of their intense absorption bands in the near-infrared region, which is desirable for applications such as photodynamic therapy (PDT). Here, we have designed a sterically crowded symmetrical Zn(II) phthalocyanine (PC-1), which contains 8 dimethoxyphenyl substituents, and studied its optical properties. PC-1 exhibits good thermal stability, appropriate theoretical HOMO and LUMO energy levels and band gap which are suitable for optoelectronic applications. PC-1 was converted into hydrophilic nanoparticles (PC-1NPs) via a solvent exchange based self-assembly approach, which exhibited good water dispersability, as well as uniform morphology and size. Optical studies revealed a bathochromic-shift in absorbance in the NIR wavelength region and 1O2 generation. These results suggest that PC-1 phthalocyanine is a potential candidate for photoinduced oxidative processes in biological and catalytic applications.
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