Strong Magnetically-Responsive Circularly Polarized Phosphorescence And X-Ray Scintillation in Ultrarobust Mn(II)-Organic Helical Chains.

Over the recent years, Mn(II)-organic materials showing circularly polarized luminescence (CPL) attract great interest because of their eco-friendliness, cheapness and room temperature phosphorescence. Using the helicity design strategy, herein we have constructed chiral Mn(II)-organic helical polymers featuring long-lived circularly polarized phosphorescence with exceptionally high g and Φ magnitudes of 0.021 and 89%, respectively, while remaining ultrarobust toward humidity, temperature and X-rays. Equally important, we have disclosed for the first time that the magnetic field has a remarkably high negative effect on CPL for Mn(II) materials, suppressing the CPL signal by 4.2-times at = 1.6 T. Using the designed materials, we have fabricated UV-pumped CPL light-emitting diodes demonstrating an enhanced optical selectivity under the right- and left-handed polarization conditions. On top of all this, the reported materials display bright triboluminescence and excellent X-ray scintillation activity with perfectly linear X-ray dose rate response up to 174 μGy s . Overall, these observations significantly contribute to the CPL phenomenon for multi-spin compounds, and promote the design of highly efficient and stable Mn(II)-based CPL emitters. This article is protected by copyright. All rights reserved.