Intrinsic Blue Fluorescence of 2.0G PAMAM-DCM Polymer Dots and Its Applications for Fe3+ Sensing

Sensors

Xin Wang¹  Jiahui Liu¹  Weiguang Shi¹  Dan Cheng²  Shihan Xu³  Yuda Wang⁴  Jiao Sun⁴  Biao Dong⁵  Wei Liu⁵ 

[1] College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, China;Daqing Ecological Environment Monitoring Center, Daqing 163318, China;Department of Bioengineering, University of Washington, Seattle, WA 98195, USA;Department of Cell Biology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China;State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China;

关键词: PAMAM;    polymer dots;    fluorescent mechanism;    metal ionic sensing;   

DOI  :  10.3390/s22031075

来源: DOAJ

【 摘 要 】

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 μM) in drinking water, indicating its great potential for Fe³⁺ detection in aqueous media.

【 授权许可】

Unknown