Dual complex of amylose with iodine and magnetite nano-crystallites: Enhanced superparamagnetic and catalytic performance for synthesis of spiro-oxindoles

被引：12

作者：

Roudsari, Saeedeh Toorchi ^{[1
]}

Rad-Moghadam, Kurosh ^{[1
]}

Hosseinjani-Pirdehi, Hamide ^{[1
]}

机构：

[1] Univ Guilan, Chem Dept, POB 41335-1914, Rasht, Iran

来源：

APPLIED ORGANOMETALLIC CHEMISTRY | 2019年 / 33卷 / 08期

关键词：

amylose; heterogeneous nano-catalyst; spiro[oxindole-dihydropyridine; superparamagnetic; POT 3-COMPONENT SYNTHESIS; THERMAL-DECOMPOSITION; STARCH; NANOPARTICLES; ACID; DERIVATIVES; FUNCTIONALIZATION; SPIROOXINDOLES; EFFICIENT; HEMATITE;

D O I：

10.1002/aoc.4993

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Mass magnetization of magnetite nanoparticles was enhanced by disassembling and encapsulating their building nano-crystallites with water-soluble starch. Incorporation of iodine into the as-prepared nano-conglomerate led to formation of a ternary nano-complex and further enhancement of its superparamagnetic susceptibility. As an additional evidence for the anomalously heightened superparamagnetic property, the ternary nano-complex showed lower magnetic remanence and coercivity than the pristine magnetite it was made from. These findings were ascribed to significant changes in, at least, size of the magnetite nano-crystallites during formation of the nano-composite. A significant enhancement was also observed in the catalytic efficiency of the nano-composite, as was successfully exemplified in the synthesis of some novel spiro[oxindole-dihydropyridine]s via a three-component reaction between isatins, furan-2,4(3H,5H)-dione and aminouracils 'on water'.

引用

页数：13