Ogbodu Racheal O, Amuhaya Edith K, Mashazi Philani, Nyokong Tebello
Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa.
Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa.
Spectrochim Acta A Mol Biomol Spectrosc. 2015;149:231-9. doi: 10.1016/j.saa.2015.04.040. Epub 2015 Apr 24.
The photophysical properties of the conjugate of uridine and zinc mono carboxy phenoxy phthalocyanine (ZnMCPPc-uridine, 4) are reported in this work. The conjugate was also adsorbed onto single walled carbon nanotubes (ZnMCPPc-uridine-SWCNT, 5). The X-ray photoelectron spectroscopy of 4 showed three N 1s peaks while that of 5 showed four N 1s peak, a new peak at 399.4 eV of 5 was assigned to pyrrolidonic nitrogen, due to the interaction of the pyrrolic nitrogen of 4 with the oxygen moiety of SWCNT-COOH in 5. The triplet lifetime, triplet and singlet oxygen quantum yields of the zinc mono carboxy phenoxy phthalocyanine increased by over 40% in the presence of uridine. SWCNTs resulted in only a small quenching of the triplet state parameters of 4.
本文报道了尿苷与单羧基苯氧基锌酞菁共轭物（ZnMCPPc - 尿苷，4）的光物理性质。该共轭物还被吸附到单壁碳纳米管上（ZnMCPPc - 尿苷 - SWCNT，5）。4的X射线光电子能谱显示有三个N 1s峰，而5的X射线光电子能谱显示有四个N 1s峰，5在399.4 eV处的一个新峰归属于吡咯烷酮氮，这是由于4的吡咯氮与5中SWCNT - COOH的氧部分相互作用所致。在尿苷存在下，单羧基苯氧基锌酞菁的三重态寿命、三重态和单重态氧量子产率提高了40%以上。单壁碳纳米管仅导致4的三重态参数有少量猝灭。
