Poly(oxyethylene)-Substituted Copper and Lutetium Phthalocyanines
摘要:
A new family of nonionic water-soluble lutetium bisphthalocyanines and a copper monophthalocyanine have been synthesized and characterized. Optical absorption determinations demonstrate aggregation processes in water. Optical microscopy, differential scanning calorimetry (DSC), and X-ray diffraction measurements have also been performed on the materials. The substituted copper complex yields a hexagonal columnar Liquid crystal above 62 degrees C; this mesophase can incorporate up to 16% (w/w) of triethylene glycol without significant disturbance of the structure, One of the substituted lutetium bisphthalocyanines affords a tetragonal columnar mesophase; the other bisphthalocyanine derivatives show only highly ordered crystalline like phases. Conductivity measurements have been carried out on thin films of the previous derivatives to determine the relative electronic and ionic conduction contributions.
A double branched photosensitive prodrug: synthesis and characterization of light triggered drug release
作者:Wei Liu、Li Liang、Pik Kwan Lo、Xiao Jun Gou、Xiao Hua Sun
DOI:10.1016/j.tetlet.2016.01.064
日期:2016.2
A novel oNB based, double branched photosensitive prodrug 1, and a biphenyl counterpart 2 were designed and synthesized. Their photo-triggered drug release properties were studied by HPLC and UV–vis spectra. The isobestic points in UV–vis spectra of prodrug 1 indicated that homogeneous photolysis reaction happened upon xenon-based light irradiation. HPLC analysis confirmed that (antitumor) chlorambucil
Poly(oxyethylene)-Substituted Copper and Lutetium Phthalocyanines
作者:Thierry Toupance、Pierre Bassoul、Ludovic Mineau、Jacques Simon
DOI:10.1021/jp960504c
日期:1996.1.1
A new family of nonionic water-soluble lutetium bisphthalocyanines and a copper monophthalocyanine have been synthesized and characterized. Optical absorption determinations demonstrate aggregation processes in water. Optical microscopy, differential scanning calorimetry (DSC), and X-ray diffraction measurements have also been performed on the materials. The substituted copper complex yields a hexagonal columnar Liquid crystal above 62 degrees C; this mesophase can incorporate up to 16% (w/w) of triethylene glycol without significant disturbance of the structure, One of the substituted lutetium bisphthalocyanines affords a tetragonal columnar mesophase; the other bisphthalocyanine derivatives show only highly ordered crystalline like phases. Conductivity measurements have been carried out on thin films of the previous derivatives to determine the relative electronic and ionic conduction contributions.
The synthesis and photophysical properties of polyether substituted phthalocyanines of potential use in photodynamic therapy
作者:Sarah Foley、Gurnos Jones、Raffaelle Liuzzi、David J. McGarvey、Martin H. Perry、T. George Truscott
DOI:10.1039/a701079f
日期:——
The synthesis, photophysical properties and singlet oxygen
yields of
a range of polyether substituted metallo and free-base phthalocyanines
are reported and discussed in the context of the potential use of these
compounds as alternatives to haematoporphyrin derivatives (HpD) in the
photodynamic therapy (PDT) of cancer. The triplet states of the
phthalocyanines have been studied in benzene and methanol using
nanosecond laser flash photolysis and pulse radiolysis. Triplet state
absorption maxima occur at ca. 510 to 525 nm and the quantum
yields of triplet formation (ϕT) lie in
the range 0.14 to 0.32. Triplet state lifetimes are in the range 26 to
155 µs. Energy transfer from the triplet state
(T1) of the phthalocyanines to ground state molecular oxygen
O23Σg-
to produce singlet oxygen O21ωg is efficient and evidence is
presented for the establishment of an equilibrium in perdeuterated
benzene, eqn. (a).Singlet oxygen quantum yields (ϕΔ),
determined by time resolved near infrared luminescence, are comparable
with the triplet yield suggesting a high proportion of quenching
encounters result in the formation of singlet oxygen.The photophysical properties of the metallophthalocyanines are
dependent on the relative atomic mass and the magnetic properties of the
central metal ion.