.png){kind=icon}
.png){kind=icon}
Return
Achieving a charge-/energy-transfer dual-channel mechanism in inorganic - organic hybrid systems for persistent room-temperature phosphorescence
.png){kind=icon}
PRE
AI
M
Y
H
D
L
X
X
T
F
Z
DOI：10.1016/j.cclet.2026.112796.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Inorganic-organic hybridization has emerged as an effective approach to activate organic room-temperature phosphorescence (RTP), yet the underlying luminescence mechanisms remain somewhat ambiguous. In this study, we have developed a novel inorganic-organic hybridization system with long-life RTP by choosing coumarin derivatives with donor–π–receptor (D–π–A) structures (7-HMCum, 7-DEAMCum and 7-AMCum) as the organic guests and heated boric acid (HBA, rigid boron oxide) as the inorganic matrix. By altering the substituents at 7-position of the coumarin guests, blue and green afterglow were obtained. Among them, 7-HMCum @ HBA demonstrated outstanding phosphorescent properties, with a phosphorescence lifetime of 2.88 s, a phosphorescence quantum yield of 19.36 % and afterglow duration of 24 s. Based on their photophysical investigation, molecular geometries and chemical bonding between the host and the guest in the ground state (O→B coordinate bond) and excited state (O–B covalent bond), as well as EPR measurement, dual-channel parallel luminescence mechanism was proposed. One is charge separation-long-range charge transfer-charge recombination luminescent channel in the case of the guest is photoirradiated; the other one involves Dexter energy transfer channel in the case of the host is photoirradiated. Dual-Channel can work synergistically. Based on the long afterglow time and adjustable colors of the doped materials, application in the fields of information anti-counterfeiting and digital encryption has been demonstrated.
Keywords:
inorganic-organic hybridization
room-temperature phosphorescence
dual-channel mechanism
coumarin derivatives
afterglow materials
Journal
IF:
8.9
Papers:
1.2W
Citations:
3.8W
Organization
Cited Papers