期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 46, 页码 24437-24442出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202110251
关键词
afterglow duration; Cu-I complex; reaction mechanisms; organic long persistent luminescence; organic room temperature phosphorescence
资金
- National Natural Science Foundation of China [51773088, 21975119]
A novel OLPL system was proposed using a melt-casting method with 0.1 mol% of Cu-I complexes doped into a TPP host, achieving an afterglow duration of over 3 hours. The OLPL lifetime can be modulated by different halogen atoms, marking a rare example of OLPL initiated through host-guest coordination with potential for expanding design strategies in this field.
Recent development of most organic long persistent luminescence (OLPL) systems employed binary or tertiary doping. However, the design strategies towards OLPL materials with hour-long afterglow duration are still quite limited. Here, we propose a novel OLPL system through melt-casting method with 0.1 mol % of Cu-I complexes: 2,2 '-bis(diphenylphosphino)-1,1 '-binaphthyl BINAP-CuX (X=Cl, Br and I) doped into the triphenylphosphine (TPP) host. The charge separation was initiated prior to excitation through host coordination with Cu-I complexes, resulting in semi-free halogen ions and in situ generated Cu-I cations, which forms TPP + BINAP-CuX ionic pairs and subsequently ionic solids. The OLPL lifetime can be readily modulated by different halogen atoms and the afterglow can last up to more than 3 hours perceivable to human eyes. This is a rare example of OLPL initiated through host-guest coordination that could potentially expand the definition of OLPL systems and design strategies.
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