Photophysical and photochemical properties of a novel thiol terminated low symmetry zinc phthalocyanine complex and its gold nanoparticles conjugate

Abstract

A novel thiol functionalized zinc phthalocyanine complex (ZnPcSH) is reported in this work. This complex was conjugated to gold nanoparticles. The photophysical and photochemical properties of the complex and the conjugate were investigated. Upon conjugation a blue shift was observed from the UV-Vis spectra. The conjugate showed a decrease in the fluorescence quantum yield and lifetime. An increase in the triplet quantum yield and lifetime was observed for ZnPcSH following conjugation to gold nanoparticles. Both ZnPcSH and its conjugate with gold nanoparticles showed high singlet oxygen quantum yields with the conjugate being higher than the Pc alone.

Improved Photophysical and Photochemical Properties of Thiopheneethoxy Substituted Metallophthalocyanines on Immobilization onto Gold‐speckled Silica Nanoparticles

“…Excitation spectra were recorded using the Q–band of the emission spectra. A time correlated single photon counting (TCSPC) setup (FluoTime 300, Picoquant GmbH) with a diode laser (LDH‐P‐670, Picoquant GmbH, 20 MHz repetition rate, 44 ps pulse width) was used to measure fluorescence lifetimes, and details have been provided before .…”

Synthesizing and evaluating the photodynamic efficacy of asymmetric heteroleptic A7B type novel lanthanide bis-phthalocyanine complexes

“…38% (Scheme 1). 48,49 The structures of novel compounds were characterized by a combination of IR, UV-Vis, MS and if possible 1 H NMR, 13 C NMR spectral data (Fig. S1-S42 †).…”

Resonant Plasmon‐Enhanced Absorption of Charge Transfer Complexes in a Metal–Organic Monolayer

“…[ 24 ] Such hybrid systems based on metal‐phthalocyanines and gold nanoparticles are very attractive objects as they encompass unique constellation of plasmonic and excitonic properties alongside with rich photochemistry of metal–organics. Being a promising model platform to study plethora of plasmon‐assisted phenomena, this type of nanostructures have already demonstrated significant increase in the quantum yield of singlet oxygen generation, [ 25–27 ] cytotoxic agent for photodynamic therapy (PDT) of cancer cells, and highly reacting agent triggering variety of chemical reactions. [ 28 ] One may anticipate a range of plasmon‐enhanced photoinduced processes out of such hybrid systems, namely nonlinear optical response, [ 29–33 ] photocurrent generation, [ 33–35 ] fluorescence, [ 36–38 ] SERS, [ 39,40 ] and other related phenomena.…”