Synthesis, photophysical characterisation and photostability studies of NIR probes with aliphatic, aromatic and chlorinated terminals in 5- and 9-amino positions of benzo[ a ]phenoxazines
作者:B. Rama Raju、Marcello M.T. Carvalho、Maria Inês P.S. Leitão、Paulo J.G. Coutinho、M. Sameiro T. Gonçalves
DOI:10.1016/j.dyepig.2016.04.049
日期:2016.9
m chlorides possessing mono and disubstituted amines with 3-chloropropyl groups at the 9-position, isopropyl, cyclohexyl and phenyl groups as terminals at 5-postion was synthesised. Photophysical studies were performed in dry ethanol and aqueous solutions. The terminals at the 5-amino position were found to influence the acid-base equilibrium. The presence of hydroxyl functionality at 2-position was
一系列新的苯并[ a]合成了具有在9位上具有3-氯丙基,在5位上为末端的异丙基,环己基和苯基的单和二取代胺的]苯恶嗪氯化物。在无水乙醇和水溶液中进行光物理研究。发现5-氨基位置的末端影响酸碱平衡。发现2-位羟基官能团的存在引入了另一种碱性形式,该碱性形式与干燥乙醇溶液中的阳离子酸形式处于平衡状态。还研究了这些化合物在不同介质中的光稳定性,并在模型生物膜中观察到了对光漂白的高抵抗力。在蛋白质中,在1小时30分钟内会发生20%的中等光漂白,