Highly Accurate Synthesis of Quasi‐sub‐nanoparticles by Dendron‐assembled Supramolecular Templates

Abstract

have been predicted to exhibit unique properties originating from the gray structures considered both bulk solids and molecules, while their synthesis is extremely difficult. The present study describes a new template synthesis method for quasi-subnanosized materials using a combination of coordination chemistry and polymer chemistry. Utilizing self-assembly of guest basic phenylazomethine dendron units onto host acidic core units with six tritylium cations, the dendron-assembled supramolecules were constructed easily and quantitatively without costly techniques. This huge supramolecular capsule accumulating multiple acidic rhodium salts in its basic ligands enabled a precise synthesis of rhodium particles via formation of multinuclear complexes. The obtained particles (Rh 84 , � 1.5 nm) have particle sizes within 1-3 nm range and were larger than conventional sub-nanoparticles (Rh 14 , � 0.85 nm), therefore the precise template synthesis of quasi-sub-nanoparticles was successfully demonstrated.

Recent advances in atomic cluster synthesis: a perspective from chemical elements

“…Indeed, the atom hybridization method utilizing multimetallic multinuclear complexes of dendrimers as macromolecular templates for cluster synthesis affords the highest degrees of freedom in the design of multielemental clusters. [187][188][189][190][191] Because it adopts the coordination behavior of guests for metal assembly based on the simple principle of acid-base chemistry, all elements can be treated under the same conditions during cluster synthesis. This approach led to the first synthesis of multimetallic clusters containing five or six metal elements like GaInAu 3 Bi 2 Sn 6 .…”

Synthesis of small PAMAM-dendrimers with Well-defined Structural Diversity.

“…There are potential applications of dendrimers in a number of different areas ranging from diagnostics, nanomedicine, nanotechnology to cosmetics [2] due to their properties. The dendritic architecture provides a multivalent surface, which can be used for amplifying weak interactions between a ligand and a receptor as demonstrated with glycodendrimers [3,4], for vaccines (MAPs) [5][6][7][8] or as artificial receptors [9][10][11][12]. The nanometer size of dendrimers allows targeting of cancer tumors using the enhanced permeation retention-effect (EPR) [13][14][15][16].…”