Issue 36, 2014

Impact of constitutional isomerism on phosphorescence and anion-sensing properties of donor–acceptor organoboron Pt(ii) complexes

Abstract

A new dimesitylboryl-functionalized molecule (NBppy) and its corresponding N^C chelate platinum(II) complex (Pt-NBppy) have been synthesized and fully characterized. The photophysical and electronic properties of NBppy and Pt-NBppy were examined and compared to their constitutional isomers, BNppy and Pt-BNppy, respectively. Due to the presence of the electron-donating diphenylamino group, the NBppy and BNppy compounds exhibit intense donor–acceptor charge transfer (CT) and bright blue fluorescence. Pt-NBppy displays weak phosphorescence, originating from a mixture of MLCT/π→π* and CT transitions while Pt-BNppy displays bright phosphorescence originating from a CT transition. The Lewis acidity of the isomers was examined by fluoride titration experiments, which established that BNppy exhibits much higher affinity towards fluoride ions than NBppy. In addition, while the phosphorescence of Pt-BNppy is quenched by fluoride addition, Pt-NBppy demonstrates an unusual turn-on phosphorescent response towards fluoride ions, which illustrate the distinct impact of constitutional isomers on phosphorescence and anion sensing.

Graphical abstract: Impact of constitutional isomerism on phosphorescence and anion-sensing properties of donor–acceptor organoboron Pt(ii) complexes

Supplementary files

Article information

Article type
Paper
Submitted
27 Jun 2014
Accepted
29 Jul 2014
First published
29 Jul 2014

Dalton Trans., 2014,43, 13696-13703

Impact of constitutional isomerism on phosphorescence and anion-sensing properties of donor–acceptor organoboron Pt(II) complexes

M. Belzile, X. Wang, Z. M. Hudson and S. Wang, Dalton Trans., 2014, 43, 13696 DOI: 10.1039/C4DT01949K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements