Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2026 Feb 23.
doi: 10.1039/d5dt02990b. Online ahead of print.

A low-spin manganese(II) complex with an emissive charge-transfer excited state

Maxwell C Rhames  1 , Nora L Burnett  2 , Annemarie A Lee  2 , Colin B Clark  2 , William C Tocco  1 , Ahshabibi Ahmed  2 , Alexander N Ruhren  2 , Claire Besson  2 , Julien A Panetier  2 , John R Swierk  2 , Daniela M Arias-Rotondo  1
Affiliations

A low-spin manganese(II) complex with an emissive charge-transfer excited state

Maxwell C Rhames et al. Dalton Trans. .

Abstract

Manganese is an attractive earth-abundant metal for chromophores because it has multiple oxidation states, making it well-suited for photochemical applications involving electron transfer reactivity. Unfortunately, the tendency of manganese(II) to form high-spin complexes with metal-centered excited states has limited its viability. Herein, we disclose an air-stable Mn(II) complex with N-heterocyclic carbene ligands. Spectroscopy revealed panchromatic absorption with two main bands in the visible region (with maxima at 480 nm and 580 nm), which have mixed charge-transfer and metal-centered character. Excitation into the low-energy band leads to an emissive state with a maximum at 770 nm (QY = 5.7 × 10-4). Time-resolved emission spectroscopy revealed biphasic kinetics for the ground state recovery and a lifetime of 480 ps.

PubMed Disclaimer