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A novel single-phase luminescent material, Ln@bio-MOF-1 (Ln: Tb3+ and Eu3+), was synthesized with a facile hydrothermal method.

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In this work, a novel ternary Eu (III) metal–organic frame-Eu(cpioa)phen (H3cpioa: 5-(4-carboxy-lphenoxy)-isophthalic, phen: 1,10-phenanthroline monohydrate) was synthesized by a facile hydrothermal method. Structural and optical properties of the binary and ternary Eu (III) MOF were studied in detail. Results show that, compared with the binary Eu(cpioa) MOF, the photoluminescence intensity of the ternary Eu(cpioa)phen MOF is increased by 13.04 times, and the quantum efficiency is increased by 67.2%. The major possible reason for the highly improved photoluminescence properties might be due to the antenna effect induced by the addition of phen. Also, the highly improved crystallinity may also contribute to the greatly increased photoluminescence intensity and quantum efficiency.