2(3), 9(10), 16(17), 23(24)-tetrakis[(3-mercapto)propoxy] phthalocyaninate zinc (II)/gold nanoparticle conjugates: Synthesis and photophysical properties

• Published in: Journal of photochemistry and photobiology. A, Chemistry. Vol. 368; pp. 242 - 247
• Main Authors: García Vior, María C., Awruch, Josefina, Dicelio, Lelia E., Diz, Virginia. E.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01-01-2019; Elsevier BV
• Subjects: Chemical synthesis; Darkness; Gold; Gold nanoparticle; Nanoparticles; Oxygen; Oxygen quantum yield; Photochemistry; Photodynamic therapy; Photosensitivity; Quantum theory; Spectroscopy; Zinc; Zinc(II) thiol-phthalocyanine; Spectroscopy; Zinc(II) thiol-phthalocyanine; Photodynamic therapy; Oxygen quantum yield; Gold nanoparticle
• ISSN: 1010-6030; 1873-2666
• DOI: 10.1016/j.jphotochem.2018.09.024

•Novel zinc (II) phthalocyanine gold nanoparticle nanoconjugates were synthetized.•The nanoconjugates showed the characteristic spherical shape and a mean diameter of 16.1 ± 4.0 nm.•Singlet molecular oxygen generation was observed when gold plasmon and phthalocyanine were independently excited.•PcS-AuNP were stable for at least 2 month at 25 °C in darkness.•The nanoconjugates system is photosensitive material in a wide range of the UV-vis spectrum (300–400 m, 500–530 nm and 610–799 nm).
Novel stable zinc (II) thiol-phthalocyaninate gold nanoparticle nanoconjugates (PcS-AuNP) with a reproducible and homogeneous distribution size of 16 ± 4 nm were efficiently prepared by means of a ligand exchange reaction. The nanoconjugates were characterized by TEM, DLS, FT-IR and UV–vis. PcS-AuNP were a stable system at least for two months in darkness. Singlet molecular oxygen generation was observed when gold plasmon and phthalocyanine were independently excited at 510 nm and 610 nm, respectively. The PcS-AuNP system obtained is a photosensitive material in a wide range of the UV–vis spectrum (300–400 nm, 500–530 nm and 610–799 nm).