9-蒽甲酸/卟啉钯衍生物的pH响应上转换性能

9-ACA/PdOEP Based pH-Responsive Triplet-Triplet Annihilation Upconversion

摘要:

以带有羧基的9-蒽甲酸(9-ACA)为发光剂，八乙基卟啉钯(PdOEP)为光敏剂，在二者最佳配比〔n(9-ACA)∶n(PdOEP) = 80∶1〕下，构建了对溶液中氢离子和氢氧根离子具备灵敏响应性的上转换发光体系9-ACA/PdOEP。当pH处于4~8以及8~11时，上转换发光强度均与pH呈现良好的线性关系。参比实验中，单一组分9-ACA本身的荧光强度与pH没有呈现线性关系，证明了体系对于pH的宽范围响应来源于光敏剂与发光剂之间的三线态-三线态能量转移(TTET)过程。

Abstract:

By using anthracene-9-carboxylic acid (9-ACA) as the emitter and palladium(II)-octaethylporphyrin (PdOEP) as the sensitizer, highly effective pH-responsive TTA-UC system was obtained at the optimal mol ratio 80∶1. The UC intensity and pH value showed good linear relationship in the pH range of 4~8 and 8~11, respectively. In the control experiment, fluorescence of 9-ACA did not reveal linear relationship with pH, proving that the broad-range pH responsiveness is derived from the triplet-triplet energy transfer (TTET) process between the sensitizer and emitter.