Oxoborane Formation Turns on Formazanate-Based Photoluminescence

Authors

Ryan R. Maar
Nicholas A. Hoffman
Viktor N. Staroverov
Joe GilroyFollow

Document Type

Article

Publication Date

Spring 5-29-2019

Journal

Chemistry - A European Journal

Volume

25

First Page

11015

Last Page

11019

URL with Digital Object Identifier

https://doi.org/10.1002/chem.201902419

Abstract

The synthesis of compounds containing multiple bonds to boron has challenged main-group chemists for decades. Despite significant progress, the possibility that the formation of such bonds can turn on photoluminescence has received minimal attention. We report an oxoborane (B=O) complex that is electronically stabilized by a formazanate ligand in the absence of significant steric bulk and, unlike the common BX₂ (X = F, Cl) formazanate adducts, exhibits intense photoluminescence. The latter property was rationalized through density-functional calculations which indicated that the B=O bond enhances photoluminescence by drastically reducing differences between the ligand's geometries in the ground and excited states. The title oxoborane compound was synthesized from an air- and moisture-stable BCl₂ formazanate complex and subsequently converted to a redox-active boroxine. Each of these species may also serve as a precursor to functional materials.

Notes

This article has been uploaded in the Wiley-VCH manuscript template, which is freely available on the web. The uploaded version has not been typset by the publisher.

This is the peer reviewed version of the following article:

Maar, R.R.; Hoffman, N.A.; Staroverov, V.N.; Gilroy, J.B.* “Oxoborane Formation Turns on Formazanate-Based Photoluminescence” Chemistry – A European Journal 2019, 25, 11015–11019.

which has been published in final form at

https://doi.org/10.1002/chem.201902419

. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions."

Funding Information

• NSERC of Canada. Grant Numbers: DG, RGPIN-2015-04814, DG, RGPIN-2018-04240, CGS-D Scholarship
• Canadian Foundation for Innovation. Grant Number: JELF, 33977
• Ontario Ministry of Research and Innovation. Grant Number: ERA, ER-14-10-147

Citation of this paper:

Maar, R.R.; Hoffman, N.A.; Staroverov, V.N.; Gilroy, J.B.* “Oxoborane Formation Turns on Formazanate-Based Photoluminescence” Chemistry – A European Journal 2019, 25, 11015–11019.