Manipulation of Organic Afterglow by Thermodynamic and Kinetic Control. Issue 67 (5th November 2021)

• Record Type: Journal Article
• Authors: Liu, Jiahui; Wang, Guangming; Wang, Xuepu; Sun, Yan; Zhou, Bei; Zou, Yunlong; Wang, Biaobing; Zhang, Kaka
• Is Part Of: Chemistry. Volume 27:Issue 67(2021)
• Page Start: 16735
• Page End: 16743
• Publication Date: 2021-11-05
• Subjects: energy landscapes -- kinetic control -- organic afterglow -- phosphorescence -- thermally activated delayed fluorescence; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202103020
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: The fabrication of room‐temperature organic phosphorescence and afterglow materials, as well as the transformation of their photophysical properties, has emerged as an important topic in the research field of luminescent materials. Here, we report the establishment of energy landscapes in dopant‐matrix organic afterglow systems where the aggregation states of luminescent dopants can be controlled by doping concentrations in the matrices and the methods of preparing the materials. Through manipulation by thermodynamic and kinetic control, dopant‐matrix afterglow materials with different aggregation states and diverse afterglow properties can be obtained. The conversion from metastable aggregation state to thermodynamic stable aggregation state of the dopant‐matrix afterglow materials to leads to the emergence of intriguing afterglow transformation behavior triggered by thermal and solvent annealing. The thermodynamically unfavorable reversible afterglow transformation process can also be achieved by coupling the dopant‐matrix afterglow system to mechanical forces. Abstract : Intriguing transformation : Through thermodynamic and kinetic control, dopant‐matrix afterglow materials with different aggregation states and diverse afterglow properties can be obtained. The conversion from metastable aggregation state to thermodynamic state, triggered by thermal and solvent annealing, can lead to the emergence of intriguing afterglow transformation. The thermodynamically unfavorable reversible afterglow transformation can be achieved by coupling the afterglow system to mechanical forces.