A dual-emissive optical sensor based on the fluorescence intensity ratio (FIR) technique has been demonstrated to have significant advantages of high sensitivity and reliability. Here, we designed and successfully prepared a selfcalibrated optical luminescent thermometer of CsPbBr 3 quantum dot (QD) encapsulated lanthanide metal−organic frameworks (Eu-BTC), and their phase compositions and luminescence properties have been characterized. Different thermo-response luminescence behaviors originating from the photoluminescence of CsPbBr 3 QDs at 528 nm and the 5 D 0 − 7 F 2 emission of Eu 3+ at 618 nm were investigated in the temperature range of 20−100 °C, in which the dual-emissive temperature-dependent emissions can serve as a ratiometric thermometer for accurate temperature monitoring applications. Significantly, the as-obtained CsPbBr 3 @ Eu-BTC hybrid exhibited a high relative sensitivity (S r ) of 3.9% °C−1 at 20 °C and excellent temperature resolution of 0.004 °C in the measured temperature range, indicating its superiority as a ratiometric luminescent thermometer for temperature sensing. The related luminescent sensing mechanism of the CsPbBr 3 @Eu-BTC is also discussed, and this work provides an effective strategy for the rational design of a reliable and stable thermometer by integrating CsPbBr 3 QDs and a carrier of a luminescent lanthanide organic framework.

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A hierarchical zeolitic imidazolate framework-8 (micro/meso-ZIF-8) was fabricated by using cetyltrimethylammonium bromide as a structure-controlling agent and l-histidine as co-templates. Compared to the conventional microporous ZIF-8 (micro-ZIF-8), the hierarchical porous structure of micro/meso-ZIF-8 contains micropores and maximum mesopores of around 35.6 nm. The as-prepared hierarchical micro/meso-ZIF-8 featured a large surface area and superior spontaneous adsorption activity than micro-ZIF-8 towards lysozyme (LZM), bovine hemoglobin (BHb) and bovine serum albumin (BSA), and the adsorption capacity increased with the decreasing of the protein size due to the molecule cutoff effects. The maximum adsorption capacity of LZM on micro/meso-ZIF-8 was higher than most of the reported results under similar adsorption conditions. The analyses of adsorption kinetics and thermodynamics implied that the adsorption mechanism mainly involved physical adsorption. Moreover, the micro/meso-ZIF-8 showed good thermal stability against temperature and excellent regeneration ability in the recycling adsorption experiments. This work proposed herein opens a broad application prospect of hierarchical MOFs in biological molecule separation, immobilization and enrichment.

A new zeotype structure with 3D intersecting 10‐ring channels is found in [Ni(en)3][Ga2Ge4O12] (denoted GaGeO‐CJ63, en=ethylenediamine). Its framework (see picture) is constructed exclusively by 3‐rings, and the framework density is the second lowest among all known zeolite structures. One of the two kinds of cages in GaGeO‐CJ63 is chiral and its chirality comes from the Δ and Λ enantiomers of occluded [Ni(en)3]2+.

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