TY - JOUR
T1 - Reversible control of triplet dynamics in metal-organic framework-entrapped organic emitters via external gases
AU - Mieno, Hiroyuki
AU - Kabe, Ryota
AU - Adachi, Chihaya
N1 - Funding Information:
This work was supported by the Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project under JST ERATO Grant Number JPMJER1305, Japan, the International Institute for Carbon Neutral Energy Research (WPI-I2CNER) sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), and MEXT/JSPS KAKENHI Grant Number JP 15K21220. We thank Dr. W. J. Potscavage Jr. for his assistance with the preparation of this manuscript.
Publisher Copyright:
© 2018, The Author(s).
PY - 2018/12/1
Y1 - 2018/12/1
N2 - Triplet excitons play an important role in the physics of organic emitters used in organic light-emitting diodes, bio-imaging, and security inks. Triplet exciton dynamics is influenced by the emitters and the environment surrounding them, but there is no effective way to alter triplet dynamics using external triggers. Here we demonstrate rapid and reversible control of the triplet dynamics of the emitter coronene via an external heavy-atom effect induced by external gases. Strong interaction between the emitter molecule and gases is achieved by encapsulating the emitter in a metal organic framework. Exposure to xenon, which has a large spin-orbit coupling, accelerates the radiative decay of triplets, leading to a stronger phosphorescence that decays more quickly than under vacuum. By contrast, excitons can be non-radiatively quenched through exposure to oxygen. This fast and reversible regulation of triplet dynamics may provide a new platform for responsive photo-switches, optical storage, and molecular computers.
AB - Triplet excitons play an important role in the physics of organic emitters used in organic light-emitting diodes, bio-imaging, and security inks. Triplet exciton dynamics is influenced by the emitters and the environment surrounding them, but there is no effective way to alter triplet dynamics using external triggers. Here we demonstrate rapid and reversible control of the triplet dynamics of the emitter coronene via an external heavy-atom effect induced by external gases. Strong interaction between the emitter molecule and gases is achieved by encapsulating the emitter in a metal organic framework. Exposure to xenon, which has a large spin-orbit coupling, accelerates the radiative decay of triplets, leading to a stronger phosphorescence that decays more quickly than under vacuum. By contrast, excitons can be non-radiatively quenched through exposure to oxygen. This fast and reversible regulation of triplet dynamics may provide a new platform for responsive photo-switches, optical storage, and molecular computers.
UR - http://www.scopus.com/inward/record.url?scp=85063772703&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063772703&partnerID=8YFLogxK
U2 - 10.1038/s42004-018-0027-x
DO - 10.1038/s42004-018-0027-x
M3 - Article
AN - SCOPUS:85063772703
SN - 2399-3669
VL - 1
JO - Communications Chemistry
JF - Communications Chemistry
IS - 1
M1 - 27
ER -