The preparation of full-color room temperature phosphorescence (RTP) metal-organic frameworks (MOFs) is attractive but remains challenging. Herein, it is demonstrated that heavy atom-free cyclodextrin MOFs (CD-MOFs) with full-color and long-lived intrinsic RTP can be achieved by CD ligand decoration. Arylboronic acids with various π conjugations are covalently anchored by γ-CD, in return, the B─O covalent bonds and hydrogen bonds jointly stabilize the triplet excitons of the arylboronic acid chromophores, leading to the longest lifetime of up to ca. 1.42 s and full-color afterglows including blue, green, and red of the decorated γ-CD. These decorated γ-CD derivatives are then linked by potassium ions to form a body-centered cubic crystalline structure, namely full-color RTP CD-MOFs. The smart RTP CD-MOFs also show excitation wavelength-dependent afterglows due to the formation of various emissive species. The CD-MOFs together with the γ-CD ligands are successfully applied in advanced dynamic information encryption and anticounterfeiting. This success paves the way for the development of ecofriendly and practical full-color RTP MOFs.
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