Metal Halide Regulated Photophysical Tuning of Zero‐Dimensional Organic Metal Halide Hybrids: From Efficient Phosphorescence to Ultralong Afterglow
Abstract
The photophysical tuning is reported for a series of tetraphenylphosphonium (TPP) metal halide hybrids containing distinct metal halides, TPP2MXn (MXn=SbCl5, MnCl4, ZnCl4, ZnCl2Br2, ZnBr4), from efficient phosphorescence to ultralong afterglow. The afterglow properties of TPP+ cations could be suspended for the hybrids containing low band gap emissive metal halide species, such as SbCl52− and MnCl42−, but significantly enhanced for the hybrids containing wide band gap non‐emissive ZnCl42−. Structural and photophysical studies reveal that the enhanced afterglow is attributed to stronger π–π stacking and intermolecular electronic coupling between TPP+ cations in TPP2ZnCl4 than in the pristine organic ionic compound TPPCl. Moreover, the afterglow in TPP2ZnX4 can be tuned by controlling the halide composition, with the change from Cl to Br resulting in a shorter afterglow due to the heavy atom effect.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 07, 2020
- Source ID
- 10.1002/anie.202010555
Entities
People
- Anna Plaviak
- Biwu Ma
- Bumjoon Kim
- Liang‐jin Xu
- Maya Chaaban
- Michael Worku
- Qingquan He
- Xinsong Lin
Organizations
- Air Force Office of Scientific Research
- Division of Chemistry
- Division of Electrical, Communications & Cyber Systems
- Division of Materials Research
- Florida State University
- KAIST
- National Research Foundation of Korea