The unique features of the metal-organic frameworks (MOFs), including ultrahigh porosities and surface areas, tunable pores, endow the MOFs with special utilizations as host matrices. In this work, various neutral and ionic guest dye molecules, such as fluorescent brighteners, coumarin derivatives, 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM), and 4-(p-dimethylaminostyryl)-1-methylpyridinium (DSM), are encapsulated in a neutral MOF, yielding novel blue-, green-, and red-phosphors, respectively. Furthermore, this study introduces the red-, green-, and blue-emitting dyes into a MOF together for the first time, producing white-light materials with nearly ideal Commission International ed'Eclairage (CIE) coordinates, high color-rendering index values (up to 92%) and quantum yields (up to 26%), and moderate correlated color temperature values. The white light is tunable by changing the content or type of the three dye guests, or the excitation wavelength. Significantly, the introduction of blue-emitting guests in the methodology makes the available MOF host more extensive, and the final white-light output more tunable and high-quality. Such strategy can be widely adopted to design and prepare white-light-emitting materials.

By a stepwise growth process, an axial-fan-like and high-nuclearity [Gd6Cu12] cluster compound (1) was obtained, in which six [Cu2] blade fragments encapsulate a “hollow” [Gd6(μ3-OH)8] octahedral core. Without the support of a centered μ6-O ligand for the octahedral core, its mean Gd−μ3-O−Gd bridging angle (φ) is the largest one among the polynuclear [Gd n ] (n ≥ 3) clusters. From the exchange and structural parameters of the reported complexes containing the GdO2Gd unit, an empirical formula was at the first time obtained. It can be concluded that φ > 110.9° is a prerequisite for a GdO2Gd complex exhibiting molecular ferromagnetism. The positive exchange constants for the Gd−Gd coupling from the empirical estimation and data fitting suggest the [Gd6] core in 1 is the first example of high-nuclearity Ln n cluster exhibiting the molecular ferromagnetism. The magnetic property for 1 is mainly predominated by the antiferromagnetic interaction of Cu−Cu coupling and the ferromagnetic interactions of Gd−Gd and of Gd−Cu coupling. At low field, 1 is a frustrated ferrimagnet, while it exhibits a single-ion behavior of Gd3+ ions at high field.

Mixed‐valence compounds with the iso‐cyanidometal‐ligand bridge in different oxidation states are used as models for the investigation of the electron‐transfer process. We synthesized a series of trimetallic isocyanidometal‐bridged compounds with [Fe–CN–Ru–NC–Fe]n+ (n=2–4), in which the one‐electron oxidation product (N3+) and two‐electron oxidation product (N4+) compounds possess an isocyanidometal bridge whose energy is, respectively lower and slightly higher than the terminal metal centers energies. For the N3+ compounds, the bridge state (FeII–RuIII–FeII) and mixed‐valence states (FeIII–RuII–FeII or FeII–RuII–FeIII) could be simultaneously observed on the IR timescale. For the N4+ compounds, as the donor becomes stronger the electron transfer bridge excited state (FeIII–RuII–FeIII) becomes more and more stable, and even becomes ground state due to the strong electronic coupling between Fe and Ru.