Photophysical Properties of Meso-tetrakis(p-methoxycarbonylphenyl) N-confused Porphyrin

Journal of Molecular Structure, Journal Year: 2025, Volume and Issue: 1340, P. 142536 - 142536

Published: April 29, 2025

Language: Английский

Oxidovanadium(IV) Porphyrin-Imidazole Complex-Catalyzed One-Pot, Three-Component Green Synthesis of Biologically Active Pyrano[2,3-d]pyrimidine and 4H-Chromene Heterocycles

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 12, 2025

A β-functionalized porphyrin ligand {H2TPP(Phen)}, has been synthesized and subsequently employed as a dibasic tetradentate in synthesizing its vanadyl complex 2-(1H-imidazo[4,5-f][1,10]phenanthroline-2-yl)-5,10,15,20-tetraphenylporphyrinatooxido-vanadium(IV)[VIVOTPP(Phen)] (1). Comprehensive characterization of the {H2TPP(Phen)} vanadyl(IV) (1) was achieved through various analytical spectroscopic techniques, including NMR, ultraviolet-visible (UV-vis), EPR, MALDI-TOF mass spectrometry elemental analysis. Electrochemical studies indicated that free base tends to four successive reduction peaks two oxidation observed cyclic voltammetry. In contrast, metalated [VIVOTPP(Phen)] displayed reversible reductions peaks. The vanadyl(IV)-porphyrin further an efficient reusable catalyst environmentally friendly, one-pot, three-component synthesis biologically clinically relevant pyrano[2,3-d]pyrimidine (Ca-Ch, Da-Dg) 4H-chromene (Ga-Gj, Ha-Hj) heterocycles. Based on current literature regarding multicomponent reactions, distinct plausible mechanistic pathways are postulated for these transformations. detailed investigation, isolation intermediates stepwise reaction analysis, revealed type 1,3-dicarbonyl compound used is pivotal determining operative pathway reactions. catalytic protocol developed heterocycles presents several advantages over existing methodologies, use eco-friendly solvent (ethanol), high product yields (up 97%), shorter time scale (30 min), turnover frequency (TOF) values 14.7 min-1), excellent reusability five cycles.

Language: Английский

Vanadyl Salen Complex Anchored on Polymer: An Efficient Catalyst for Selective Oxidation of Sulfides to Sulfoxides

Journal of Inorganic and Organometallic Polymers and Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 28, 2024

Language: Английский