advanced-nanotechnology-2019-keynote

EuroSciCon Conference on Advanced Nanotechnology

April 18-19, 2019 | Paris, France

Page 23

Nano Research & Applications

ISSN: 2471-9838

Advanced Nanotechnology 2019

endrimers are highly branched organic macromolecules with successive

layers or generations of branch units surrounding a central core. Organic

inorganic hybrid versions have also been produced, by trapping metal ions

or metal clusters within the voids of the dendrimers. Their unusual, tree-like

topology endows these nanometer-sized macromolecules with a gradient in

branch density from the interior to the exterior, which can be exploited to

direct the transfer of charge and energy from the dendrimer periphery to

its core. We show that tinchloride, SnCl

and FeCl

complexes to the imines

groups of a spherical polyphenyl azomethine dendrimer in a stepwise fashion

according to an electron gradient, with complexation in a more peripheral

generation proceeding only after complexation in generations closer to the

core has been completed. By attaching an electron-withdrawing group to the

dendrimer core, we are able to change the complexation pattern, so that the

core imines are complexed last. By further extending this strategy, it should

be possible to control the number and location of metal ions incorporated

into dendrimer structures, which might and uses as tailored catalysts,

building blocks, or fine-controlled clusters for advanced materials. The

metal-assembly in a discrete molecule can be converted to a size-regulated

metal particle with a size smaller than 1 nmas amolecular reactor. Due to the

well-defined number of metal particles in the subnanometer size region, its

property is much different from that of bulk or general metal nanoparticles.

Synthesis of Pt subnano catalyst

using a dendrimer reactor

Kimihisa Yamamoto

Tokyo Institute of Technology, Japan

Biography

KimihisaYamamotohasreceivedhisPhDdegrees in

Polymer Chemistry fromWaseda University in 1990.

He joined the Department of Chemistry at Keio Uni-

versity from 1997 as a Professor. Currently, he is a

Professor in the Laboratory of Chemistry and Life

Science, Tokyo Institute of Technology since 2010.

He is a Project Leader for Yamamoto Atom Hybrid

Project adopted as a Japan Science andTechnology

Agency (JST), Strategic Basic Research Program

(ERATO) started in October, 2015.

Kimihisa Yamamoto., Nano Res Appl 2019, Volume:5

DOI: 10.21767/2471-9838-C2-032