Cyclometalated Pt(II) complexes with tetradentate Schiff base ligands: Synthesis, photophysics, electrochemical studies and optical power limiting performance

Studying of physicochemical properties of Coumarin based Nano-complexes for biomedical applications

“…However, the electronpoor sites has blue color (favor site for donor atoms nucleophilic attack) [49]. Furthermore, reactivity parameters such as total energy and HOMO and LUMO energies are calculated in addition to selected quantum chemical parameters of Schiff base ligand (HL) are tabulated in Table (3), as ΔE, absolute electronegativities, v, chemical potentials, Pi, absolute hardness, g, absolute softness, r, global electrophilicity, x, global softness, S, and additional electronic charge, ΔNmax, were calculated according to the following equations: (8) Electrophilicity index (ω) determines toxicity and the reactivity of various active sites. η and σ indexes, represent the molecular stability and reactivity.…”

“…Condensation of primary amine (NH2) with carbonyl group (C=O) forming Schiff bases with characteristic azomethine (-C=N-) function group with resemblance to compounds naturally exist in living organisms [6,7]. Moreover, azomethine group belongs lone pair of electrons in sp 2 hybridized orbital of nitrogen atom that offer bonding capability with metals, forming coordination compounds, thus, chemical and biological properties could be originated from ligand activity [8,9]. Schiff bases obtained from amine and heterocyclic ring have been found an interest because of their pharmacological properties [10,11].…”

“…Figure(8). Total atomic charges on atoms in HL ligand and Cu(II) complex, DFT Mulliken population analysis…”

Record Aluminum Molecular Rings for Optical Limiting and Nonlinear Optics

“…[3] Typical OL materials contain carbon-based materials (including carbon black, carbon nanotubes, fullerenes and graphene), [4] organic dyes and polymers (such as phthalocyanine and porphyrin), [5,6] inorganic metal nanoparticle and quantum dots, [7][8][9] as well as organic and inorganic hybrid materials. [10][11][12][13][14][15][16] Hybrid materials possessing flexibility and possible synergic effects of diverse compo-nents are promising OL materials. As a result, aggregated crystalline materials like coordination polymers, metalorganic frameworks and metal complexes are among the materials that might become the next generation in the current field.…”

“…As a result, aggregated crystalline materials like coordination polymers, metalorganic frameworks and metal complexes are among the materials that might become the next generation in the current field. [12][13][14][15][16] A noteworthy reason is that the variation of metal ions and ligands may offer more opportunities for fine-tuning of the optical properties. Metal molecular rings of high nuclearity have long fascinated chemists due to their aesthetically pleasing structures and interesting properties.…”