Enhanced Room‐Temperature Phosphorescence through Intermolecular Halogen/Hydrogen Bonding

• Published in: Chemistry : a European journal 2019-01, Vol.25 (3), p.714-723
• Main Authors: Xiao, Lu, Fu, Hongbing
• Format: Article
• Language: English
• Subjects: Chemistry; Fluorescence; halogen bonds; Hydrogen bonding; hydrogen bonds; Inorganic compounds; luminescence; Metals; noncovalent interactions; Organic chemistry; Organic compounds; Organic materials; Phosphorescence; Room temperature; room-temperature phosphorescence
• ISSN: 0947-6539; 1521-3765
• DOI: 10.1002/chem.201802819

Room‐temperature phosphorescence (RTP) materials with high efficiency have attracted much attention because they have unique characteristics that cannot be realized in conventional fluorescent materials. Unfortunately, efficient RTP in metal‐free organic materials is very rare and it has traditionally been considered as the feature to divide purely organic compounds from organometallic and inorganic compounds. There has been increasing research interest in the design and preparation of metal‐free organic RTP materials in recent years. It has been reported that intermolecular interactions make a big difference to the photophysical behavior of organic molecules. In this regard, herein, the parameters that affect RTP efficiency are discussed, and a brief review of recent intermolecular halogen‐/hydrogen‐bonding strategies for efficient RTP in metal‐free organic materials are provided. The opportunities and challenges are finally elaborated in the hope of guiding promising directions for the design and application of RTP materials. Fixed formations: Room‐temperature phosphorescence (RTP) materials have attracted increasing research interest because of their promising functional applications. Recent examples of intermolecular halogen‐/hydrogen‐bonding strategies for efficient RTP in metal‐free organic materials are summarized.