Phosphorescent meso-unsubstituted metallo-porphyrin probe molecules for measuring oxygen and imaging methods
申请人:Oxygen Enterprises, Ltd
公开号:US10493168B2
公开(公告)日:2019-12-03
Oxygen levels in biological tissue or systems can be measured by the phosphorescence quenching method using phosphorescent porphyrin probes, also referred to as a dendritic oxygen probes, with controllable quenching parameters and defined biodistributions. Provided are a “next generation” of oxygen sensors with substantially improved phosphorescence emission for better imaging capabilities, ease of use, increasing the quantum efficiency (phosphorescence intensity) and extending their range of applicability including constructing a class of oxygen sensors for making measurements in organic media. In addition, provided are methods for synthesizing new porphyrin constructs in which the porphyrin is made less flexible and more planar, changing with decrease internal quenching, and thereby increasing the phosphorescence emission used for oxygen sensing. Additional methods are provided for structurally modifying the dendrimer used to encapsulate the porphyrin phosphor to provide internal quenching of singlet oxygen molecules formed during oxygen measurements.
生物组织或系统中的氧含量可通过磷光淬灭法测量,使用的磷光卟啉探针(也称为树枝状氧探针)具有可控的淬灭参数和确定的生物分布。本发明提供了一种 "下一代 "氧传感器,其磷光发射大大改善,成像能力更强,易于使用,提高了量子效率(磷光强度),扩大了其适用范围,包括构建了一类在有机介质中进行测量的氧传感器。此外,还提供了合成新的卟啉结构的方法,其中的卟啉柔韧性更差,平面度更高,内部淬火减少,从而增加了用于氧传感的磷光发射。此外,还提供了从结构上修改用于封装卟啉荧光粉的树枝状聚合物的方法,以便对氧气测量过程中形成的单线态氧分子进行内部淬灭。