A family of Mn(ii) complexes exhibiting strong photo- And triboluminescence as well as polymorphic luminescence
Inorganic Chemistry Frontiers, ISSN: 2052-1553, Vol: 8, Issue: 15, Page: 3767-3774
2021
- 36Citations
- 14Captures
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Article Description
A family of robust metal complexes of [Mn(L)X2] and (LH)2[MnX4] type (X = Cl, Br, I) have been synthesized based on xanthene-derived bisphosphine dioxides (L = XantphosO2 or t-Bu-XantphosO2). At ambient temperature, the designed compounds exhibit strong green to yellow phosphorescence with quantum yields as high as 90%. Remarkably, complex [Mn(XantphosO2)Br2] reveals polymorphic luminescence, which is a rare phenomenon for Mn compounds. Two polymorphs of this compound, crystallizing in P1 and P21/n space groups, display green and yellow luminescence, respectively, with the emission quantum yield being 33 and 50%. Moreover, the "yellow"polymorph features bright triboluminescence upon grinding its crystals. An in-depth photophysical study evidences that the observed phosphorescence is due to the ligand-sensitized 4T1 → 6A1 transitions in Mn2+ ions.
Bibliographic Details
Royal Society of Chemistry (RSC)
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