Journal
SMALL
Volume 16, Issue 49, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202005035
Keywords
clustering‐ triggered emission; nonconventional luminophores; nontraditional intrinsic luminescence; persistent room temperature phosphorescence; through‐ space conjugation
Categories
Funding
- National Natural Science Foundation of China [51822303, 21725304, 11774125]
- Natural Science Foundation of Shanghai [20ZR1429400]
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The rational modulation of the nontraditional intrinsic luminescence (NTIL) of nonconventional luminophores remains difficult, on account of the limited understanding on the structure-property relationships and emission mechanisms. Herein, the effective modulation of NTIL is demonstrated based on a group of nonaromatic anhydrides and imides. Mutual bridging of isolated subgroups effectively promotes intramolecular through-space conjugation (TSC), leading to red-shifted emission, enhanced efficiency, and prolonged persistent room-temperature phosphorescence (p-RTP). The substitution of heteroatoms from oxygen to nitrogen drastically changes the TSC and enhances intermolecular interactions, resulting in enhanced emission efficiency. In addition, upon freezing, compression, or embedding into polymer matrices, the emission intensity and color remain well regulated. These results shed new light on the rational modulation of the NTIL and p-RTP of nonconventional luminophores.
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