Вид документа : Статья из журнала Шифр издания : 54/S 98 Автор(ы) : Young Rang Uhm , Hi Min Lee , Fedorova O. V., Ovchinnikova I. G., Valova M. S., Rusinov G. L., Charushin V. N., Chang Kyu Rhee Заглавие : Synthesis of carbon encapsulated metal (Ni and Cu) nano particles and applications for chiral catalysts Место публикации : Research on Chemical Intermediates . - 2010. - Vol. 36, № 6-7. - С. 867-873 Примечания : Bibliogr. : p. 873 (15 ref.) ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Carbon-encapsulated Ni and Cu nanoparticles with a core/shell structure were synthesized by levitational gas condensation (LGC). Methane (CH4) gas was used to coat the surface of the Ni and Cu nanoparticles. The Ni particles had a core diameter of 10 nm, and were covered by 2–3 nm thin carbon layers. In the case of Cu, the particles had a core diameter of 30 nm, and multi-shells with a thickness of 2–3 nm. Biginelli reaction in the presence of l-proline and Ni encapsulated nanoparticles was carried out to change the ratio between stereoisomers in favor of the S-enantiomer for 3,4–dihydropyrimidine (DHPM) with an excess of about 18% Держатели документа: Центральная научная библиотека УрО РАН Доп.точки доступа: Young Rang Uhm ; Hi Min Lee ; Fedorova, O. V.; Федорова Ольга Васильевна; Ovchinnikova, I. G.; Овчинникова Ирина Георгиевна; Valova, M. S.; Rusinov, G. L.; Русинов Геннадий Леонидович; Charushin, V. N.; Chang Kyu Rhee