am8b21617_si_004.pdf (124.28 kB)
Mechanochromic Wide-Spectrum Luminescence Based on a Monoboron Complex
journal contribution
posted on 2019-01-28, 00:00 authored by Yanyu Qi, Nannan Ding, Zhaolong Wang, Ling Xu, Yu FangA reversible mechanochromic
luminescent material based on a simple
tetrahedral monoboron complex (B-1) is described. Interestingly,
in addition to amorphous powders (P), the compound could
exist in three unique crystal states (A, B, and C), showing efficient green-to-red luminescent
colors, which is a result of wane and wax of dual emissions of the
compound. Surprisingly, one of the emissions increases significantly
with increasing temperature, fully offsetting the quenching effect
of temperature-assisted internal conversion process. The four states
are fully interconvertible through grinding and heating, allowing
color writing/painting with a single ink.