...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>New Journal of Chemistry >Naphthalimide-based organic nanoparticles for aluminium recognition in acidic soil and aqueous media
【24h】

Naphthalimide-based organic nanoparticles for aluminium recognition in acidic soil and aqueous media

机译：基于萘二甲酰亚胺的有机纳米颗粒，可在酸性土壤和水性介质中识别铝

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An organic compound 1 was prepared using 1,8-naphthalimide and diethylenetriamine, and the resultant receptor showed interesting potential for metal recognition. The chemosensor activity of the naphthalimide-based receptor was evaluated following the synthesis of the organic nanoparticles (ONPs) using a reprecipitation method. The organic nanoparticles were evaluated for their photophysical properties, mainly using fluorescence spectroscopy in aqueous media, and the studies revealed that the ONPs selectively recognized aluminium ions in aqueous media. The sensor showed competitive binding for Al~(3+) and none of the other metal ions tested caused any interference in the detection of Al~(3+). Titrations were performed with aluminium ions, and the lowest detection limit calculated was 677 nM. The sensor was used to determine the Al~(3+) content of river water and acidic soils; results were validated using existing methods and the performance of the ONPs was found to be in a satisfactory error range. Finally, the mechanism of fluorescence recognition was further confirmed using DFT calculations, which showed that the aluminium, upon addition to receptor 1, takes away the excess electrons i.e. a lone pair from the central nitrogen of the diethylenetriamine part of receptor 1. This causes a reduction in photo-induced electron transfer (PET) and an increase in fluorescence intensity, which was authenticated using NMR and UV-Visible spectroscopic titrations of receptor 1 with Al~(3+) ions.
机译：使用1,8-萘二甲酰亚胺和二亚乙基三胺制备有机化合物1，所得受体显示出令人感兴趣的金属识别潜力。使用再沉淀法合成有机纳米粒子（ONP）之后，评估了基于萘二甲酰亚胺的受体的化学传感器活性。主要在水性介质中使用荧光光谱对有机纳米颗粒的光物理性质进行了评估，研究表明，ONPs选择性识别水性介质中的铝离子。该传感器显示出对Al〜（3+）的竞争结合，并且测试的其他金属离子均未对Al〜（3+）的检测造成任何干扰。用铝离子进行滴定，计算出的最低检测限为677 nM。该传感器用于测定河水和酸性土壤中的Al〜（3+）含量;使用现有方法验证了结果，发现ONP的性能在令人满意的误差范围内。最后，使用DFT计算进一步证实了荧光识别的机制，该研究表明，铝添加到受体1中后，会从受体1的二亚乙基三胺部分的中心氮带走多余的电子，即孤对。减少的光诱导电子转移（PET）和增加荧光强度，这已通过NMR和UV〜-可见分光光度法对Al-1（3+）受体1进行了验证。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号