A series of carboxylic acids including amino acids were protected as their corresponding fluorescent ester conjugates by coupling with an environment sensitive fluorophore 9-methylacridine. Photophysical properties of all the ester conjugates along with the protecting group have been investigated. Interestingly, the emission properties of the ester conjugates and 9-methylacridine were found to be highly sensitive to polarity, H-bonding and pH of the environment. Photolysis of all the ester conjugates was carried out using UV light above 360 nm and it was found that in every case the corresponding carboxylic acids were released in high chemical yield. Further, intercalation and the preferred binding mode of acridine-9-methanol and its ester conjugates with DNA were studied. In vitro biological studies revealed that acridine-9-methanol has good biocompatibility, cellular uptake property and cell imaging ability.
一系列
羧酸包括
氨基酸被保护为其对应的荧光酯偶联物,通过与环境敏感荧光团
9-甲基吖啶进行偶联。所有酯偶联物及其保护基团的荧光物理性质已被研究。有趣的是,酯偶联物和
9-甲基吖啶的发光性质对环境的极性、氢键和pH值表现出高度敏感性。所有酯偶联物通过使用波长大于360纳米的紫外光进行光解,结果发现在每种情况下对应的
羧酸都能以高产率释放。进一步研究了
吖啶-9-
甲醇及其酯偶联物与DNA的嵌插和优选结合模式。体外
生物学研究表明,
吖啶-9-
甲醇具有良好的
生物相容性、细胞摄取特性和细胞成像能力。