期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 141, 期 15, 页码 6157-6161出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b02055
关键词
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资金
- National Natural Science Foundation of China [91622120, 21872154, 21601194, 21472196]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB12010400]
Polymorphism and anisotropy are fundamental phenomena of crystalline materials. However, the structure-dependent photoluminescent (PL) anisotropy in polymorphic organic crystals has remained unexplored. Herein, two polymorphic nanocrystals, green-emitting nanorods (PtD-g) and yellow-emitting nanoplates (PtD-y), were obtained from a platinum(II)-beta-diketonate complex. The PtD-y crystals display remarkable PL anisotropy with an anisotropy ratio of up to 0.87 whereas the emission of the PtD-g crystals is nearly unpolarized. The polarization properties are rationalized on the different molecular packing of these crystals. By light-harvesting energy transfer, the PtD-y crystals are successfully used to amplify the emission polarization of a red-emitting platinum acceptor (PtA) doped into the donor crystalline matrix, which is otherwise weakly polarized as pure crystals.
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