Qi-Hua Zhao

In this work, a systematic exploration was conducted on the solution-state photophysical and optical properties of a series of enantiomeric clusters. The enantiomeric clusters exhibit aggregation-induced emission characteristics and yield circular dichroism signals with distinct Cotton effects that display perfect mirror-image relationships. Furthermore, we observed the phenomenon where aggregation significantly attenuates their circular dichroism signals. Cytotoxicity assays confirm the good biocompatibility of the clusters, demonstrating their potential for cell imaging applications.

Fluorescent metal clusters are ideal fluorescent probe materials due to their small size and good photostability. In this work, three copper clusters (1-3) based on mercaptobenzothiazole-derived ligands were successfully synthesized and characterized, and their crystal structures were determined by single-crystal X-ray diffraction. The differences in substituents regulate their fluorescence. All three clusters exhibited highly selective and sensitive detection toward Fe(III) and Cr(VI) (CrO₄^2- and Cr₂O₇^2-) in aqueous solution, while 1 and 3 could also selectively recognize 2-nitrophenol (2-NP). Moreover, systematic investigations into the underlying recognition mechanisms were carried out in detail, and key sensing parameters, including the Stern-Volmer constant (K_sv) and limit of detection (LOD), were accurately determined via fluorescence titration experiments. This study provides effective guidance for the design and application of copper-sulfur clusters in environmental chemicals.

High-order cycloaddition offers a direct and powerful strategy for constructing medium-sized architectures, but it is often limited by low yields and poor stereoselectivity. Here, we report a template- assisted [6+6] photodimerization reaction, which is achieved via the self-assembly of a two-dimensional (2D) coordination polymer (CP) CP1. The coordination template precisely organizes the reactants. Under irradiation with visible light or natural sunlight, the [6+6] photodimerization proceeds in an environmentally friendly and selective manner. To demonstrate the universality and functionality of this strategy, we introduce methoxy-functionalized ligands to construct CP2, which not only undergoes the same [6+6] cycloaddition reactions but also exhibits temperature-responsive properties. The combination of CP1 and CP2 with Poly(vinyl alcohol) (PVA) and MXene (2D transition-metal carbides) further enhances their actuation properties, making them suitable for adaptive materials. This work establishes a milestone in template-assisted cycloaddition reactions, offering an approach to achieving higher-order cycloadditions and expanding the development of crystal adaptronics.

In this work, a dual-functional MOF (Mn-MOF) with proton conductivity and fluorescence recognition capabilities was constructed by employing a functional ligand.

In this work, pyrazolyl ligand and SO42- was used to synthesize MOF (MOF-SO4) with ultrahigh proton conductivity properties (0.104 S·cm−1 at 90 °C and 98% RH). Furthermore, when MOF-SO4 was...

Luminescent metal–organic frameworks (LMOFs) provide exceptional advantages over conventional materials in detecting harmful gases. However, challenges remain, such as limited stability, unclear fluorescence signal changes and insufficient mechanistic understanding. In this study, we developed two types of lanthanide metal–organic frameworks (Ln‐MOFs) exhibiting rapid (3+ triggers a pronounced 45 nm redshift in fluorescence by altering the MOFs' overall energy and electron transfer dynamics. The combination of these two signals greatly amplifies the fluorescence transition. Outstanding stability allows the sample's initial fluorescence to be fully restored through simple thermal desorption, enabling recyclability. With fewer open metal sites, Ln‐ETTB achieves fluorescence “turn‐on” detection of NH ₃ vapor solely via benzene ring locking, and it can likewise be recycled. This study presents the first report of such dual‐channel gas‐responsive LMOFs. We thoroughly elucidated the underlying mechanisms through experimental work and DFT calculations, paving the way for new advancements in LMOFs‐based gas sensing.

Luminescent metal–organic frameworks (LMOFs) provide exceptional advantages over conventional materials in detecting harmful gases. However, challenges remain, such as limited stability, unclear fluorescence signal changes and insufficient mechanistic understanding. In this study, we developed two types of lanthanide metal–organic frameworks (Ln‐MOFs) exhibiting rapid (3+ triggers a pronounced 45 nm redshift in fluorescence by altering the MOFs' overall energy and electron transfer dynamics. The combination of these two signals greatly amplifies the fluorescence transition. Outstanding stability allows the sample's initial fluorescence to be fully restored through simple thermal desorption, enabling recyclability. With fewer open metal sites, Ln‐ETTB achieves fluorescence “turn‐on” detection of NH ₃ vapor solely via benzene ring locking, and it can likewise be recycled. This study presents the first report of such dual‐channel gas‐responsive LMOFs. We thoroughly elucidated the underlying mechanisms through experimental work and DFT calculations, paving the way for new advancements in LMOFs‐based gas sensing.

In this work, three novel three-dimensional metal-organic frameworks (MOF-1-3) were successfully synthesized, and their chemical stability and intrinsic fluorescence sensing capabilities were confirmed. Property modification of MOF-1-3 was realized via the loading of Congo red (CR), a cationic dye; meanwhile, the CR loading behavior and underlying mechanism of these MOFs were systematically investigated. After CR loading, the fluorescence properties of the resulting CR@MOF-1-3 composites underwent significant changes. Notably, compared with MOF-1-3, CR@MOF-1-3 exhibited selective recognition toward Cr(VI) anions (CrO₄^2- and Cr₂O₇^2-) while effectively eliminating interference from Fe(III) ions. This study underscores the potential of CR@MOF-1-3 as multifunctional fluorescent sensing platforms for environmental monitoring and chemical analysis and provides rational guidance for the design of MOF-based fluorescent probes.