Synthesis and third-order nonlinear optical properties of a sandwich-type mixed (phthalocyaninato)(schiff-base) triple-decker complexes

Optically Active Microspheres Containing Schiff Base: Preparation and Enantio-Differentiating Release toward Drug Citronellal

“…The applications of Schiff bases have received ever-increasing attention because the characteristic chemical bond [−(CN)−] has excellent ion coordinative capability , and pH-responsive ability . Schiff bases and their derivatives have been widely used for developing catalyst intermediates, , biological sterilizations, , fluorescent reagents, , self-assembled polymers, , and polymer stabilizers . More recently, it was reported that Schiff bases can be used as electrodes for batteries and used to prepare metal–organic frameworks (MOFs) , and covalent organic frameworks (COFs) .…”

Changing optical nonlinearities of homoleptic bis(phthalocyaninato) rare earth praseodymium double-decker complexes by the redox reaction

“…Usually, the sandwich-type bis(phthalocyaninato) rare earth complexes possess peculiar electrical and magnetic properties enabling them to be used as gas sensors [8,9], organic field effect transistors [10], molecular information storage materials [11], etc. More interestingly, these types of complexes exhibit the strong optical nonlinearities [2,12], which have broad nonlinear photonic applications in optical limiter, saturable absorber, all-optical switch, and so on. To protect human eyes and sensitive optical elements from laser-induced damage, an ideal optical limiter is expected to have high transmittance for low intensity inputs, while possessing lower transmittance for high intensity inputs.…”

“…It is well documented that the enhancement of the third-order optical nonlinearities of bis(phthalocyaninato) rare earth complexes mainly originates from the introduction of rare earth metal ions with its large π -conjugated system and strong intramolecular π π − interaction [2,12]. By appropriate design of macrocycles, researchers have established various sandwich-type design strategies, including the double-or triple-decker molecular structure [5,6], the multiple-decker structure [16], and the mixed triple-decker structure [12]. At the same time, many efforts are concentrated on elucidating structure-property relationships for the optical refractive and absorptive nonlinearities of sandwich-type rare-earth multiple-decker complexes.…”

A Mixed Porphyrin–Schiff Base Dysprosium(III) Single‐Molecule Magnet

“…Sandwich‐type tetrapyrrole, that is, porphyrin (Por) and phthalocyanine (Pc), rare‐earth complexes have been studied intensively in the past several decades owing to their potential applications in the areas of field‐effect transistors, molecular magnets, and molecular‐based multibit information storage . To extend the scope of sandwich‐type rare‐earth complexes and, in particular, to afford new advanced molecular materials with new scaffolds, Schiff base macrocyclic ligands have been introduced into sandwich systems to afford mixed phthalocyaninato–Schiff base rare‐earth double‐, triple‐, and quadruple‐decker compounds, as identified through clear single‐crystal structural elucidation . However, this is not true for the mixed porphyrin–Schiff base rare‐earth analogues …”