Spectroscopic Properties of Quercetin-3-O-rhamnoside and Quercetin-3-O-rutinoside in Aerosol-OT Reverse Micelles

Bulletin of the Korean chemical society

Hai Bo Liu¹  Hyoung Ryun Park¹  Ki Min Bark¹  Jong Keun Park¹  Sung Chul Shin¹ 

关键词: Quercetin;    AOT reverse micelle;    Intramolecular proton transfer;    Intramolecular charge transfer;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The anomalous spectroscopic properties of quercetin-3-O-rhamnoside (QCRM) and quercetin-3-O-rutinoside (QCRT) in AOT reverse micelle were studied. The excited state intramolecular proton transfer (ESIPT) occurs through the strong hydrogen bond between the –OH at position 5 and the carbonyl oxygen. Because the ESIPT can only happens in the S1 state and the Franck-Condon factor involved in the S2 → S1 internal conversion is small, the S2 → So emission alone appears. Because the molecular planarity is improved at the interior of the micelle, the excited state intramolecular charge transfer in the S1 state is extended, and the excited state is more tolerable for any quenching effects in the micelle. Therefore, an S1 → So emission was newly discovered under this micelle microenvironment. For the S2 → So emission, the quantum yields increase but the quantum yield of the S1 → So emission approximately decreases as the water concentration in the micelle increases.

【 授权许可】

Unknown