Coordination
Polymer Gels with Modular Nanomorphologies, Tunable Emissions, and
Stimuli-Responsive Behavior Based on an Amphiphilic Tripodal Gelator
Papri Sutar
Tapas Kumar Maji
10.1021/acs.inorgchem.7b01002.s001
https://acs.figshare.com/articles/journal_contribution/Coordination_Polymer_Gels_with_Modular_Nanomorphologies_Tunable_Emissions_and_Stimuli-Responsive_Behavior_Based_on_an_Amphiphilic_Tripodal_Gelator/5293690
The recent upsurge in research on
coordination polymer gels (CPGs) stems from their synthetic modularity,
nanoscale processability, and versatile functionalities. Here we report
self-assembly of an amphiphilic, tripodal low-molecular weight gelator
(<b>L</b>) that consists of 4,4′,4-[1,3,5-phenyl-tri(methoxy)]-tris-benzene
core and 2,2′:6′,2″-terpyridyl termini, with
different metal ions toward the formation of CPGs that show controllable
nanomorphologies, tunable emission, and stimuli–responsive
behaviors. <b>L</b> can also act as a selective chemosensor
for Zn<sup>II</sup> with very low limit of detection (0.18 ppm) in
aqueous medium. Coordination-driven self-assembly of <b>L</b> with Zn<sup>II</sup> in H<sub>2</sub>O/MeOH solvent mixture results
in a coordination polymer hydrogel (<b>ZnL</b>) that exhibits
sheet <i>like</i> morphology and charge-transfer emission.
On the other hand, coordination of <b>L</b> with Tb<sup>III</sup> and Eu<sup>III</sup> in CHCl<sub>3</sub>/tetrahydrofuran solvent
mixture results in green- and red-emissive CPGs, respectively, with
nanotubular morphology. Moreover, precise stoichiometric control of <b>L</b>/Eu<sup>III</sup>/Tb<sup>III</sup> ratio leads to the formation
of bimetallic CPGs that show emissions over a broad spectral range,
including white-light-emission. We also explore the multistimuli responsive
properties of the white-light-emitting CPG by exploiting the dynamics
of Ln<sup>III</sup>-tpy coordination.
2017-08-09 14:34:58
Amphiphilic Tripodal Gelator
CPG
morphology
mixture results
Coordination Polymer Gels
coordination polymer hydrogel
formation
Eu
emission
Tb
self-assembly
III
tripodal low-molecular weight gelator
Zn II