A multi-cation responsive Ni(ii)-supramolecular metallogel mimics a molecular keypad lockviareversible fluorescence switching

Abstract

Synthesis of a bidentate N,O-donor Schiff base fluorescent ligand 5-(diethylamino-2-((4-(diethylamino-2-((4-(diethylamino)phenylimino)ethyl)phenol) (HL) adopting new preparation procedure and its complexes with Ni(II) (1) and Zn(II) (2), has been illustrated. Structures of HL...

An Encyclopedic Compendium on Chemosensing Supramolecular Metal‐Organic Gels

“…Zn(II), Cu(II), and Hg(II) : The article by Pandey et al showed the synthesis and characterization of a Ni(II) metal‐based gel based on a fluorescent bidentate N, O‐donor Schiff base ligand F16 [212] . The gel formation process was achieved in triethylamine (TEA) presence employing THF/MeOH solvents.…”

“…F16. [212] The gel formation process was achieved in triethylamine (TEA) presence employing THF/MeOH solvents. This demonstrated excellent sensitivity to Ni(II) ions, with a clear distinction between 1 : 1 and 1 : 2 stoichiometries, resulting in mechanically stable and unstable gels, respectively.…”

Anticounterfeiting Feature of a Writable and Self-Erasable Ni(II)-Metallogel Pad via Fluorescent “Turn-On” Detection of Cyanide

“…Notably, different organic/inorganic moieties (Schiff base and hydrazone derivatives) as LMMGs interact with their metal coordinating sites through versatile supramolecular noncovalent interactions to form a metallogel network. − Due to their easy availability and cost-effectiveness, transition-metal ions (Cd 2+ , Zn 2+ , Cu 2+ , Ni 2+ , Co 2+ ) have been used toward the synthesis of economically feasible functional gelators. Nickel­(II) ion finds many effective applications such as in coordination complex formation, polymer synthesis, catalysis, quantum dot formation, gas adsorption, paramagnetic alloys, and optoelectronic/semiconducting electronic devices. − Moreover, Ni­(II)-induced metallogels exhibit specific features such as magnetic, thermal, biological, and self-healing properties in supramolecular chemistry. , A urea-functionalized pyridyl dicarboxylate-based Ni­(II) gel has demonstrated potential for drug delivery via H···bonding and π···π stacking interactions . In addition, a tetra- and hexa-podal carboxylic acid/amide-based Ni­(II)-based gel was developed that exhibited chemical interactions for dyes and CO 2 adsorption .…”

Comparative Vision of Nonlinear Thermo-Optical Features and Third-Order Susceptibility of Mechanically Flexible Metallosupramolecular Self-Repairing Networks with Isomeric Organic Acids

“…Duplicating the nature, this domain of supramolecular phenomena epitomizes versatile and auspicious fields of research, manifesting an extensive array of scientific and technological advancements . The genesis of lab-made metallogels entails a self-assembling symphony of metal-containing fragments and gelator molecules, orchestrating an exquisite three-dimensional network in the presence of a suitable immobilized-solvent, resulting in a gel-like arrangement. , These versatile supramolecular systems display a wide array of interplaying interactions contributing to their unique properties and applications. − Foremost among these interactions is the metal−ligand coordination, wherein metal ions precisely coordinate with ligands nestled within the gel matrix. ,, This coordination imparts structural stability to the gel network, allowing it to self-assemble into intricate architectures. Other essential supramolecular interactions involving hydrogen bonding, coordination-driven self-assembly, host–guest interactions, electrostatic, π−π stacking, hydrophilic, and hydrophobic interactions, van der Waals, etc., are well documented to influence its mechanical properties in the gel state. − The resulting metallogel exhibits a semisolid viscoelastic behavior with a high degree of structural integrity.…”