How does the solvent influence the structure and luminescence of Pb(II) benzoate complexes?

Label:chem

Topic
Six Pb(II) complexes with benzoate-derived ligands (2-methoxybenzoate, 1,4-benzodioxan-5-carboxylate, piperonylate) were synthesized in water, DMSO or MeOH and their structures and optical properties were compared.
Answer
Water incorporation (as aqua ligands) in 2 ([Pb(2MeOBz)₂(H₂O)]ₙ) and 4 ([Pb(1,4Bzdiox)₂(H₂O)]ₙ) yields non-centrosymmetric 1-D coordination polymers that display solid-state photoluminescence (greenish for 2, greenish-yellow for 4), whereas the anhydrous or DMSO-containing analogues 1 and 3 are non-luminescent and crystallize in centrosymmetric space groups. Piperonylate complex 5 prepared in water is non-luminescent (centrosymmetric), whereas the MeOH-derived mixed-ligand 6 ([Pb(Ac)(Pip)₂(MeOH)]ₙ) forms a 2-D network via additional tetrel bonds but also remains non-luminescent.
Return to Home Chemical List
Knowledge you may be interested in
Which hydrogen-bonding interactions dominate solute transfer into isobutyl acetate? What is the Abraham general solvation model and how is it applied to isobutyl acetate? How was the successful conjugation of pea protein hydrolysates (PPH) and D-xylose confirmed, and what structural changes were observed? How were the pea protein hydrolysates (PPH) prepared, and what are the optimal conditions for glycosylation with D-xylose? What is the impact of solvent polarity and viscosity on the dynamic equilibrium of ligands in colloidal metal chalcogenide QDs? How does fenpropidin exert its fungicidal effects and what are its key systemic properties? What is the origin and mechanism of action of zhongshengmycin? What is the primary therapeutic use of rimegepant? What is Alecensa's therapeutic classification? What type of medicinal drug is cycloheximide? What are the major fatty acids found in Scenedesmus obliquus BGP and Porphyridium cruentum oils? What is the antifungal mechanism of action for the synthesized phenolic acid triazole derivatives, and how do they compare to carbendazim? What is the characteristic compound of Ampelopsis grossedentata (vine tea)? How many bioactive compounds were systematically identified in vine tea, and how were they classified? Which compounds in vine tea contain the pyrogallol moiety and are potentially responsible for anti-SARS-CoV-2 activity? What is the nucleation mechanism of p-methoxybenzoic acid (PMBA) in an ethanol-water system at different saturation temperatures? How does the ethanol mass fraction affect the metastable zone width (MSZW) and interfacial energy of p-methoxybenzoic acid (PMBA)? How does p-methoxybenzoic acid (PMBA) solubility vary with temperature and ethanol mass fraction? What are the primary forms of vitamin K, and where are they found? How is vitamin K status measured, and why are indirect markers preferred?