In continuation of our work on glycoconjugated phthalocyanines, two new water soluble, non-ionic zinc(II) phthalocyanines have been prepared and fully characterized by means of 1H-NMR, 13C-NMR, MALDI-TOF, ESI-TOF, UV-Vis spectroscopy, emission spectroscopy and fluorescence lifetime measurements. The carbohydrate-containing phthalonitrile precursors were synthesized through a copper-catalyzed azide-alkyne cycloaddition (CuAAC). The 2-methoxyethoxymethyl protecting group (MEM) was used to protect the carbohydrate moieties. It resisted the harsh basic cyclotetramerization conditions and could be easily cleaved under mild acidic conditions. The glycoconjugated zinc(II) phthalocyanines described here have molar extinction coefficents εmax > 105 m−1 cm−1 and absorption maxima λ > 680 nm, which make them attractive photosensitizers for photo-dynamic therapy.
继续我们在糖共轭
酞菁方面的工作,制备了两种新型
水溶性非离子
锌(II)
酞菁,并通过 1H-NMR、13C-NMR、MALDI-TOF、ESI-TOF、UV-Vis 进行了充分表征光谱、发射光谱和荧光寿命测量。含
碳水化合物的邻苯二甲腈前体是通过
铜催化的
叠氮化物-炔环加成(Cu
AAC)合成的。 2-甲氧基乙氧基甲基保护基(M
EM)用于保护
碳水化合物部分。它能抵抗严酷的碱性环四聚条件,并且在弱酸性条件下很容易裂解。这里描述的糖共轭
锌 (II)
酞菁具有摩尔消光系数 εMAx > 105 m−1 cm−1 和最大吸收 λ > 680 nm,这使得它们成为光动力治疗中有吸引力的光敏剂。