3 years ago

An ESIPT fluorophore based on zinc-induced intramolecular proton transfer between ligands in the complex

Yanyan Zhu, Maoping Song, Chenxia Du, Xu Liu, Mingsheng Tang, Chunmei Liu, Bin Zhang, Qin Gao, Na Gao, Mengsi Gu
The zinc complex (ZnE) has been designed and synthesized based on 2-(2'-hydroxyphenyl)-1-ethyl-4-hydroxybenzimidazole (EtL). The zinc ion works as a spacer to link two coordinated EtL, forming intramolecular hydrogen bonds between the ligands. Upon excitation, in addition to a weak emission at 399 nm, ZnE exhibits strong excited-state intramolecular proton-transfer (ESIPT) emission maximized at 479 nm with a large Stokes shifted (8449 cm-1) in tetrahydrofuran solution. Importantly, ESIPT process also takes place for ZnE in powder, resulting in dual emission (407 and 490 nm) with photo-luminescent quantum yields (Φ) of 0.16. Quantum calculations further suggest that the ESIPT fluorescence is based on the zwitterionic excited-state species resulting from one proton transfer between the ligands.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/ejic.201701083

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.