Symmetry Breaking in the Supramolecular Gels of an Achiral Gelator Exclusively Driven by π–π Stacking
作者:Zhaocun Shen、Yuqian Jiang、Tianyu Wang、Minghua Liu
DOI:10.1021/jacs.5b10496
日期:2015.12.30
achiral molecular building blocks, has been achieved in the organogels of a C3-symmetric molecule only via π-π stacking. Specifically, an achiral C3-symmetric benzene-1,3,5-tricarboxylate substituted with methylcinnamate through ester bond was found to form organogels in various organic solvents. More interestingly, when gels formed in cyclohexane, symmetry breaking occurred; i.e., optically active organogels
Nitrification Inhibitors from the Root Tissues of <i>Brachiaria humidicola</i>, a Tropical Grass
作者:Subramaniam Gopalakrishnan、Guntur V. Subbarao、Kazuhiko Nakahara、Tadashi Yoshihashi、Osamu Ito、Ikuko Maeda、Hiroshi Ono、Mitsuru Yoshida
DOI:10.1021/jf062593o
日期:2007.2.1
inhibitory compounds were isolated by activity-guided fractionation, using recombinant Nitrosomonas europaea containing luxAB genes derivedfrom the bioluminescent marine gram-negative bacterium Vibrio harveyi. The compounds were identified as methyl-p-coumarate and methyl ferulate, respectively. Their nitrification inhibitory properties were confirmed in chemically synthesized preparations of each.
Synthesis of alkyl coumarate esters by celite-bound lipase of Bacillus licheniformis SCD11501
作者:Shivika Sharma、Priyanka Dogra、Ghanshyam S. Chauhan、Shamsher S. Kanwar
DOI:10.1016/j.molcatb.2013.12.017
日期:2014.3
reaction system. Molecular sieves had an important effect on the ester synthesis resulting in an enhanced yield. Maximum yield was recorded for methyl coumarate (69.0%) possibly because methylgroup causes less stearic hindrance to the catalytic site of the lipase due to which it becomes more accessible for immobilized lipase to undergo esterification. The characterization of synthesized esters was done through