达叔
1.Uncle Tat is the supervisor of a profitable seaport pier , which a triad has been eyeing for quite some time .
2.The yields of PC for the two catalysts are 90 4% and 83 3%, respectively, after reaction at 140 ℃ for 3 h. Tert butyl substituted metal phthalocyanine shows higher catalytic activity than unsubstituted metal phthalocyanine because the homogeneous catalytic system resulted from more soluble ( t Bu) 4MPc is beneficial to the reaction and the increased charge density of ( t Bu) 4MPc caused by introducing tert butyl, an electron donor group, facilitates the insertion of CO 2 in cycloaddition.
3.The old technological conditions of antioxidant 1076 being prepared from. 2,6 di tert butyphenol,methacrylate and n octadecanol have been improved. The yield is above 80%.
4.The DSCs with the electrolyte (1.0 mol·dm-3 DMPII, 0.10 mol·dm-3 LiI, 0.12 mol·dm-3 I2, 0.50 mol·dm-3 4-tert-butylpyridine, in MePN) gave short circuit photocurrent density (Jsc) of 16.76 mA·cm-2, open circuit voltage (Voc) of 0.69 V, and fill factor (FF) of 0.70, corresponding to a photoelectric conversion efficiency (η) of 8.08% under one Sun (AM1.5).
5.A new method for quinalphos synthesis in a single step at low temperature is described, using liquid alkalias an acid acceptor, and tertiary amines and quaternary ammonium salts as binary phase transfer catalysts. Experimen-tal yields were greater than 93.6%, and the new method has the advantages of short reaction time, consistent yields,low production costs, lends itself to pilot-scale production.
6.This paper presents the polymerization of lactide by a bimetallic lan- thanide complex of[(ArO)_2(DME)Sm]_2[(μ-η~4-(PhN)OCCO(NPh)](ArO=2,6-di-tert- butyl-4-methyphenoxo)and the effects of catalyst concentraction,polymerization time,tem- perature and monomer concentraction.The polymerization mechanism is also discussed. Based on experiments the molecular weight of polymers can reach 10.0×10~4.
