Self-Stabilized Amorphous Organic Materials with Room-Temperature Phosphorescence

Wei Xu; Yaguo Yu; Xiaonan Ji; Huarui Zhao; Jinming Chen; Yanyan Fu; Huimin Cao; Qingguo He; Jiangong Cheng

doi:10.1002/anie.201906881

Self-Stabilized Amorphous Organic Materials with Room-Temperature Phosphorescence

Angew Chem Int Ed Engl. 2019 Nov 4;58(45):16018-16022. doi: 10.1002/anie.201906881. Epub 2019 Sep 25.

Authors

Wei Xu^{1

2}, Yaguo Yu^{1

2}, Xiaonan Ji^{1

2}, Huarui Zhao¹, Jinming Chen^{1

2}, Yanyan Fu^{1

2}, Huimin Cao¹, Qingguo He^{1

2}, Jiangong Cheng^{1

2}

Affiliations

¹ State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Changning Road 865, Shanghai, 200050, China.
² Center of Materials Science and Optoelectronics Engineering, University of the Chinese Academy of Sciences, Yuquan Road 19, Beijing, 100039, China.

PMID: 31419005
DOI: 10.1002/anie.201906881

Abstract

The stability of pure organic room-temperature phosphorescent (RTP) materials in air has been a research hotspot in recent years. Without crystallization or encapsulation, a new strategy was proposed to obtain self-stabilized organic RTP materials, based on a complete ionization of a photo-induced charge separation system. The ionization of aromatic phenol 4-carbazolyl salicylaldehyde (CSA) formed a stable H-bonding anion-cation radical structure and led to the completely amorphous CSA-I film. Phosphorescent lifetimes as long as 0.14 s at room temperature and with direct exposure to air were observed. The emission intensity was also increased by 21.5-fold. Such an amorphous RTP material reconciled the contradiction between phosphorescence stability and vapor permeability and has been successfully utilized for peroxide vapor detection.

Keywords: amorphous stability; molecular recognition; photo-induced charge separation; room-temperature phosphorescence; supramolecular chemistry.

Abstract

Grants and funding