期刊
SENSORS
卷 22, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/s22031075
关键词
PAMAM; polymer dots; fluorescent mechanism; metal ionic sensing
资金
- National Natural Science Foundation of China [82073475]
- Major Basic Research Projects of Shandong Natural Science Foundation [ZR2020ZD36]
- Graduate Student Innovation Research Project of Northeast Petroleum University [JYCX_CX03_2018]
- Project of Jilin Provincial Department of Health [ZYXWST2021061]
In this study, blue fluorescent PAMAM polymer dots with good fluorescence properties and iron ion detection ability were successfully prepared using a simple hydrothermal method.
A typical and environment-friendly fluorescent polyamine-amine (PAMAM) features good compatibility and unique surface modification, while it is restricted by a low fluorescence property performance and an unclear fluorescence mechanism. In this work, we prepared blue fluorescent PAMAM polymer dots (PDs) via a simple hydrothermal method based on dichloromethane (DCM) and 2.0G PAMAM. The quantum yield achieved was 32.1%, which was 25 times stronger than that of 2.0G PAMAM due to the lone-pair electron leap of the amine groups, the aggregation of carbonyl groups, as well as the crosslinking induced by DCM inside the PAMAM. In addition, the fluorescent 2.0G PAMAM-DCM PDs show a great Fe3+ sensing property with the detection limit of 56.6 nM, which is much lower than the safety limits (5.36 mu M) in drinking water, indicating its great potential for Fe3+ detection in aqueous media.
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