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Uniformly dispersed 5 wt % ruthenium catalysts supported on Al x SBA-15 (x = Si/Al ratio) were prepared by chemical fluid deposition employing supercritical CO2 as the solvent for hydrogenating dimethyl terephthalate to dimethyl 1,4-cyclohexanedicarboxylate in water. Complete conversion of dimethyl terephthalate was achieved over a Ru5/Al20SBA-15 catalyst having the highest number of Lewis acid sites at 100 °C and 4.14 MPa H2 pressure in 1 h. Here, 100% selectivity with a dimethyl 1,4-cyclohexanedicarboxylate yield of 93.4% was observed in 0.5 h due to complete cutoff of hydrocracking byproducts at shorter reaction times. Al modification enhanced selectivity of the catalysts toward dimethyl 1,4-cyclohexanedicarboxylate by governing the distribution of Lewis and Brönsted acid sites in the support. Water as a functional solvent enriched the hydrogenation of dimethyl terephthalate via an on-water mechanism. The Ru5/Al20SBA-15 catalyst was stable over five cycles. Greener catalyst synthesis, use of water, mild reaction conditions, and high atom economy led the proposed system to be a greener sustainable process.

SummaryA series of 2,2’-bipyrimidine-bridged dinuclear lanthanide complexes with the general formula [Ln(tmhd)3]2bpm (tmhd = 2,2,6,6-tetramethyl-3,5-heptanedionate, bpm = 2,2’-bipyrimidine, Ln = Gd(III), 1; Tb(III), 2; Dy(III), 3; Ho(III), 4 and Er(III), 5) has been synthesized and characterized. Sublimation of [Tb(tmhd)3]2bpm onto a Au(111) surface leads to the formation of a homogeneous film with hexagonal pattern, which was studied by scanning tunneling microscopy (STM). The bulk magnetic properties of all complexes have been studied comprehensively. The dynamic magnetic behavior of the Dy(III) and Er(III) compounds clearly exhibits single molecule magnet (SMM) characteristics with an energy barrier of 97 and 25 K, respectively. Moreover, micro-SQUID measurements on single crystals confirm their SMM behavior with the presence of hysteresis loops.

The soluble 115 nuclear silver cluster [Ag115S34(SCH2C6H4 tBu)47(dpph)6] was synthesized and fully characterized in solution and in the solid state.

In the title compound, Bi(2)B(8)O(15), the Bi atom is coordinated to five or six O atoms. The B atoms exhibit two kinds of hybridization, sp(2) and sp(3), seen in the BO(3) triangles and BO(4) tetrahedra, respectively. Three BO(3) triangles are connected to form a B(3)O(6) planar ring. All atoms in the structure are connected together to form an infinite three-dimensional network.

Introduction:Endemic measles persists in China, despite >95% reported coverage of two measles-containing vaccine doses and nationwide campaign that vaccinated more than 100 million children in 2010. In 2011, almost half of the 9943 measles cases in China occurred in children eligible for measles vaccination. We conducted a case-control study during 2012–2013 to identify risk factors for measles infection in children aged 8 months–14 years.Methods:Children with laboratory-confirmed measles were age- and neighborhood-matched with three controls. We interviewed parents of case and control infants on potential risk factors for measles. We calculated adjusted matched odds ratios and 95% confidence intervals of risk factors. We calculated attributable fractions for risk factors that could be interpreted as causal and vaccine efficacy (VE) for the measles containing vaccine (MCV) used in the Chinese immunization program.Results:In all, 969 case-patients and 2845 controls were enrolled. In multivariable analysis, lack of measles vaccination both overall (mOR 22.7 [16.6, 31.1] and when stratified by region (east region, mOR 74.2 [27.3, 202]; central/western regions mOR 17.4 [12.5, 24.3]), hospital exposure (mOR 63.0, 95% CI [32.8, 121]), and migration among counties (overall mOR 3.0 [2.3, 3.9]) were significant risk factors. The calculated VE was 91.9–96.1% for a single dose of MCV and 96.6–99.5% for 2 doses.Conclusions:Lack of vaccination was the leading risk factor for measles infection, especially in children born since the 2010 supplementary immunization activity. Reducing missed vaccination opportunities, improving immunization access for migrant children, and strengthening school/kindergarten vaccine checks are needed to strengthen the routine immunization program and maintain progress toward measles elimination in China.