Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 40, Pages 17461-17466Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202007588
Keywords
crystallization-induced emission; electrochemiluminescence; emission enhancement; photoluminescence; solid-state emitters
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Funding
- Program for Excellent Young Innovative Research Team in the Higher Education Institutions of Hubei Province [T201726]
- Hubei Province 111 Project [2019BJH023]
- NSERC [DG RGPIN-2018-06556, SPG STPGP-2016-493924]
- CFI/OIT [9040]
- PREA [2003]
- University of Western Ontario
- NSERC-CGSM
- Ontario graduate scholarship
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Elucidating the effects of crystallization-induced blue-shift emission of a newly synthesized di-boron complex (DBC) by enhanced photoluminescence (PL) and electrochemiluminescence (ECL) in the annihilation pathway was realized for the first time. The 57 nm blue-shift and great enhancement in the crystalline lattice relative to the DBC solution were attributed to the restriction of intramolecular rotation (RIR) and confirmed by PL imaging, X-ray diffraction, as well as DFT calculations. It was discovered that ECL at crystalline film/solution interfaces can be further enhanced by means of both co-reactant route and RIR. The RIR contributions with co-reactant increased ECL up to 5 times more. Very interestingly, the co-reactant system was found to give off a red-shifted light emission. Mechanistic studies reveal that a difference between location of the ECL in the co-reactant route and that in the annihilation pathway leads to an alternative emission wavelength.
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