可蓝光激发阳离子型有机铱(III)配合物的设计、合成及应用

可蓝光激发的阳离子型有机铱(III)配合物可在GaN蓝光芯片激发的LEDs中用作下转换发光材料，用来制备高品质暖白光和中性白光。可蓝光激发的阳离子型有机铱(III)配合物还可用于化学发光检测和生物成像等领域，可以避免常用的紫外光激发所导致的非目标待检物发光干扰，同时可以避免紫外线的光毒性和光致分解等副作用。但目前绝大多数阳离子型有机铱(III)配合物的激发光谱位于紫外光区，不能实现蓝光激发，本项目计划通过在有机配体上扩大共轭体系、引入给电子-吸电子基团（即D-A单元）、配位芳香环上引入给电子取代基和π-π堆积等方法来实现阳离子型有机铱(III)配合物在蓝光区的高效激发，并将获得的可蓝光激发的阳离子型有机铱(III)配合物应用于暖白光/中性白光LEDs和离子检测等领域。

Blue-light excitable cationic organic iridium(III) complexes can be used as down-conversion luminescent materials in light-emitting diodes (LEDs) excited by blue GaN chips for obtaining high quality warm or neutral white light. Blue-light excitable cationic organic iridium(III) complexes also can be used in some other fields, such as chemiluminescence detection and bioimaging. In such fields, when blue-light being used as excitation light instead of usual ultraviolet light, some defects caused by ultraviolet light can be avoided, such as the disturbances of the light-emitting from non-target, phototoxicity, photodecomposition and so on. However, up to now, the excitation spectra of most of cationic organic iridium(III) complexes locate in ultraviolet light region and can not be excited by blue-light. In this project, efficient blue-light excitability of the cationic organic iridium(III) complexes will be realized by enlarging conjugated system in organic ligands, electron donor-acceptor (D-A) units being involved in ligands, electron donor substituting groups on coordinated aromatic rings and π-π stacking, and such blue-light excitable cationic organic iridium(III) complexes will mainly be used in warm or neutral white LEDs and detections of ions.