5102-45-4Relevant academic research and scientific papers
Exploring triazole-Thiourea Based Ligands for the Self-Assembly of Photoluminescent Hg(II) Coordination Compounds
Adarsh, Nayarassery N.,Benaissa, Houria,Chorazy, Szymon,Garcia, Yann,Hooper, James G. M.,Mitoraj, Mariusz P.,Radi, Smaail,Robeyns, Koen,Sagan, Filip,Wolff, Mariusz,Zakrzewski, Jakub J.
, p. 3562 - 3581 (2021)
This study represents the first explorative investigation on the supramolecular structural diversity in Hg(II) coordination chemistry with triazole-thiourea ligands leading to a variety of mononuclear, binuclear, and coordination polymers: {[Hg(L1)2(L1-)2]} (1), {[Hg2(L1)2(μ2-I)2I2]·DMSO} (2), {[Hg(L2)(μ2-I)I]·MeOH}∝ (3), {[Hg2(μ-L3-)4]}∝ (4), {[HgCl(L4-)L4]·MeOH} (5), {[Hg2(L4)2(μ2-I)2(I)2]·2MeOH} (6), {[Hg2(μ2-L5-)4]}∝ (7), {[Hg2(μ2-Cl)2(L6-)2(L6)2]} (8), {[Hg2(μ2-Br)2(L6-)2(L6)2]} (9), and {[Hg2(μ2-I)2(L6-)2(L6)2]} (10). A reaction mechanism was suggested for the unexpected ligand rearrangement occurring in {[Hg2I3(μ3-L5′)]}∝ (11). The ligands were fully characterized including by X-ray crystallography and computational means. This includes six new triazole-thiourea based ligands, namely, 1-R-3-(4H-1,2,4-triazol-4-yl)thiourea (where R = methyl (L1), ethyl (L2), propyl (L3), isopropyl (L4), and its polymorph (L4-poly), allyl (L5), ethyl acetate (L6), and its solvate (L6_MeOH)). Under UV light excitation, 7, 10, and 11 exhibit visible photoluminescence of wide origin, ranging from ligand-centered (LC) fluorescence combined with organic-ligand-to-metal charge transfer (LMCT) emissive states in 7 and 10, up to halide-to-metal charge transfer (XMCT) combined with halide-to-ligand charge transfer (XLCT) emissive states in 11. The variable emission mechanisms in the obtained coordination polymers were elucidated by experimental proofs confronted with theoretical calculations of the electronic densities of states, proving that Hg(II) halide coordination polymers involving flexible 1,2,4-triazole-based ligands form a promising class of luminescent molecular materials.
Synthesis, antimicrobial and pharmacological evaluation of thioureaderivatives of 4H-1,2,4-triazole
Bielenica, Anna,Kedzierska, Ewa,Fidecka, Sylwia,Maluszynska, Hanna,Miroslaw, Barbara,Koziol, Anna E.,Stefanska, Joanna,Madeddu, Silvia,Giliberti, Gabriele,Sanna, Giuseppina,Struga, Marta
, p. 263 - 276 (2015/04/14)
A group of 4H-1,2,4-triazole-derived thioureas was efficiently prepared and evaluated for antibacterial, antifungal and antiviral activities.The chemical identity of all derivatives was established on the basis of spectral methods. The molecular structures of 10 and 21 were determined by an X-ray crystallography. Compounds with phenyl (1), 3,4-dichlorophenyl (2) and p-methoxyphenyl (3) substituents were the most promising against fungi species. The derivative 12 has proved to be significantly active against CVB-5. The CNS-activity of five new 4H-1,2,4-triazolo-thiourea derivatives 2, 10, 12, 18 and 21 was investigated. The results proved that activity of all tested thiourea compounds may be connected with the serotonergic system. Derivatives 2, 10, 12, 18 acted as inhibitors of the head twitch responses (HTR).The biological activity of 21 was also linked with the endogenous opioid system. The derivative 18 diminished the spontaneous mobility and 10 reduced the amphetamineinduced activity of laboratory animals.
