Eight isostructural lanthanide coordination polymers [Ln(bptc)(phen)(H2O)]n (Ln = Dy for , Eu for , Tb for , Gd for , Sm for , Nd for , Yb for , Pr for ) were successfully prepared based on bridging asymmetric polycarboxylate ligand biphenyl-3,2',5'-tricarboxylic acid (H3bptc) and chelating 1,10-phenanthroline (phen) coligand. Single crystal X-ray analysis reveals that complexes have a (3,6)-connected CdI2-type coordination network consisting of paddle-wheel dimers [Ln2(CO2)4]. The magnetic and fluorescent properties of have been investigated. Significantly, the Dy(iii) complex behaves with slow relaxation of the magnetization, where the frequency-dependent out-of-phase signals are noticed.

As the energy source of living cells and the intermediate product of metabolism, glucose plays an important role in biological systems. Therefore, it is of great significance to establish a reliable and sensitive method for the detection of glucose, especially in blood. Herein, a “switch-on” fluorescence sensor for rapid, sensitive, and specific detection of glucose was successfully developed. In this strategy, PCN-224 served as the recognition unit, while AgNPs played the roles as both a “quencher”, to decrease the fluorescence intensity of PCN-224, and an H2O2 recognizer. After exposure to H2O2 that was produced in situ during GO x -catalyzed oxidation of glucose, AgNPs can be effectively etched into silver ions and released from PCN-224, thereby recovering the fluorescence of PCN-224. The present sensing strategy shows many merits including high sensitivity with a low limit of detection (0.078 μM) and excellent selectivity toward glucose over other saccharides. More importantly, the sensing platform we proposed was further extended to monitoring glucose in human serum samples with satisfactory recoveries, indicating its promising potential for diagnostic purposes.

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Use of hydrocarbon fuels as coolants for future high-Mach aircraft is challenged by the formation of carbonaceous deposits during thermal stressing at high temperatures (>500 °C). Three hydrogen donors, tetralin (THN), R-tetralone (THNone), and benzyl alcohol (BzOH), and two organic selenides, diphenyl selenide (Ph 2 Se) and diphenyl diselenide (Ph 2 Se 2 ), as well as their mixtures, are selected as thermally stable additives to inhibit the deposition from the thermal stressing of n-dodecane and Chinese RP-3 (No. 3 jet fuel). It is found that the amount of solid deposits from thermal stressing of RP-3 is reduced by 77.0% with the additive of Ph 2 Se 2 /THN/THNone. The carbonaceous solid is further characterized using temperature-programmed oxidation (TPO), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). It is revealed that hydrogen donor THN/THNone and organic selenides possibly reduce the carbon deposits through retarding the thermal cracking rate, blocking surface catalysis, and depressing reactivity of sulfur with the surface metals, as well as their synergistic effect. The morphologies of deposits also dramatically change after adding organic selenides or hydrogen donors.