Metal induced gelation from pyridine cored poly(aryl ether) dendrons with in situ synthesis and stabilization of hybrid hydrogel composites

Abstract

Metal induced gel formation from pyridine cored poly(aryl ether) dendrons has been achieved. The gel is successfully utilized as a template for the in situ synthesis of silver nanoparticles (AgNPs) in hydrogel networks without using any external reducing or capping agents for the development of an exceptionally well-ordered AgNP-hybrid hydrogel soft composite.

Organometallic Hydrogels

“…Metal‐induced self‐assembly and gel formation followed by in situ synthesis of metal nanoparticles are an efficient way to prepare the hybrid hydrogel. One good example is the gelation of pyridine‐cored poly(aryl ether) dendrons (Figure A) with AgNO 3 . The resulting silver complex gel can slowly undergo reduction of silver ions to form silver nanoparticles without any external reducing agent/UV‐light irradiation resulting in a hybrid hydrogel (Figure B).…”

“…Reprinted and modified from Ref. , , with permission. Copyright 2014 Royal Society of Chemistry, 2015 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim.…”

Infinite coordination polymer networks: metallogelation of aminopyridine conjugates and in situ silver nanoparticle formation

“…[28] In-situ silver nanoparticle (AgNP) formation in metallogels involving pyridine and bipyridyl molecules have been reported either under ambient conditions, UV irradiation or sodium borohydride reduction. [29,30] However, in a majority of the reports, the resulted AgNPs were relatively large (>5 nm). We have recently reported synthetically simple bipyridyl based gelators displaying a remarkable difference in their ability to size and shape selective AgNP formation depending on the source of reducing agent and gelator chemical structure.…”

A Phenylalanine Derivative Containing a 4‐Pyridine Group Can Construct Both Single Crystals and a Selective Cu‐Ag Bimetallohydrogel

“…For example, several groups, including ours, have reported the formation of Cu 2+ ‐metallohydrogels using different gelators, and metallohydrogels triggered by other metal ions, such as Ag + , Co 2+ , Ni 2+ , Pb 2+ and Cd 2+ . [2e], Recently, we have constructed the first La 3+ ‐selective metallohydrogel using a gelator of a phenylalanine (Phe) derivative containing an imidazole group . Despite these achievements, the studies on formation of bimetallogels are still limited.…”