{"id":7984,"date":"2025-04-14T14:32:33","date_gmt":"2025-04-14T14:32:33","guid":{"rendered":"https:\/\/chempublishers.com\/Pakistan-journal-of-chemistry\/?p=7984"},"modified":"2025-04-14T14:59:19","modified_gmt":"2025-04-14T14:59:19","slug":"pjc-0825","status":"publish","type":"post","link":"https:\/\/chempublishers.com\/Pakistan-journal-of-chemistry\/2025\/04\/14\/pjc-0825\/","title":{"rendered":"Complex Compounds of Ti(IV), Ni(II), Cu(II) and Zn(II) with 3-Hydroxypicolinic acid (3-HPA) and 3,5-Dinitrosalicylic acid\u00a0(3,5-DNSA) as Precursors of Micro- and Nano-sized Oxides"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"7984\" class=\"elementor elementor-7984\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8f82c98 e-flex e-con-boxed e-con e-parent\" data-id=\"8f82c98\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-ee043f4 e-con-full e-flex e-con e-child\" data-id=\"ee043f4\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fe3c6f7 elementor-widget elementor-widget-text-editor\" data-id=\"fe3c6f7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table border=\"0\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\" align=\"center\"><tbody><tr><td><div><strong>Research Article | Open Access<\/strong><\/div><div class=\"item doi\"><span class=\"value\">Volume 15| Issue 3 | Page 47-53 | <a href=\"https:\/\/chempublishers.com\/Pakistan-journal-of-chemistry\/wp-content\/uploads\/sites\/2\/2025\/04\/PJC.v15.i03.p08.pdf\" target=\"_blank\" rel=\"noopener\">https:\/\/doi.org\/10.15228\/2025.v15.i3.p08<\/a><\/span><\/div><\/td><\/tr><\/tbody><\/table><h4><strong><b>Complex Compounds of Ti(IV), Ni(II), Cu(II) and Zn(II) with 3-Hydroxypicolinic acid (3-HPA) and 3,5-Dinitrosalicylic acid\u00a0(3,5-DNSA) as Precursors of Micro- and Nano-sized Oxides<\/b><\/strong><\/h4><p><strong>D. L. Han<\/strong><br \/>Department of Environmental Chemistry Analytical Institute of Environmental Chemistry Vietnam &#8211; Russia Tropical Center, Hanoi, Vietnam<\/p><p><strong>A. Utenyshev<\/strong><br \/>Kosygin Russian State University (Technologies. Design. Art), Moscow, 119071, Russia<\/p><p>Federal Research Center of Problem of Chemical Physics and Medicinal Chemistry RAS, Chernogolovka, Moscow Region 142432, Russia<\/p><p><strong>G. Shilov<\/strong><br \/>Federal Research Center of Problem of Chemical Physics and Medicinal Chemistry RAS, Chernogolovka, Moscow Region 142432, Russia<\/p><p><strong>N. Lobanov<\/strong><br \/>Peoples&#8217; Friendship University of Russia, Moscow, 117198, Russia.<\/p><p><a href=\"https:\/\/orcid.org\/0000-0002-6684-5829\" target=\"_blank\" rel=\"noopener\"><strong>O. Kovalchukova<\/strong><\/a><br \/>Peoples&#8217; Friendship University of Russia, Moscow, 117198, Russia.<\/p><p>Kosygin Russian State University (Technologies. Design. Art), Moscow, 119071, Russia.<\/p><div class=\"row\"><div class=\"main_entry\"><table border=\"0\" width=\"93%\" cellspacing=\"0\" cellpadding=\"0\" align=\"center\"><tbody><tr><td align=\"center\" valign=\"top\"><strong>Received<\/strong><br \/>24 Mar, 2025<\/td><td align=\"center\" valign=\"top\"><strong>Accepted<\/strong><br \/>10 Apr, 2025<\/td><td align=\"center\" valign=\"top\"><strong>Published<\/strong><br \/>14 Apr, 2025<\/td><\/tr><\/tbody><\/table><div class=\"item abstract\"><p>Nine complex compounds of Ti(IV), Ni(II), Cu(II) and Zn(II)\u00a0with 3-hydroxy picolinic acid (3-HPA) and 3,5-dinitrosalicylic acid (3,5-DNSA) of the composition ML<sub>2<\/sub>\u00a0(M: Ni<sup>2+<\/sup>, Cu<sup>2+<\/sup>\u00a0and Zn<sup>2+<\/sup>; L: 3-HPA and 3,5-DNSA) and TiOL<sub>2<\/sub>\u00a0were isolated and studied by spectroscopic methods and X-ray structure analysis. The coordination of 3-HPA with the metals involves the N pyridine atom and an O atom of the neighboring COOH group. For 3,5-DNSA, a chelate cycle is formed with two O atoms of carboxylic and hydroxy-groups. This was proved by X-ray analysis for Cu complexes and UV-VIS and IR spectra of all other complexes in comparison with the exact data for Cu complexes. The introduction of 9,10-phenanthroline prevents the coordination of 3,5-DNSA with Cu, and it acts as a counter-ion. Thermal decomposition of the isolated complexes and their mixtures leads to the formation of micro-sized metal oxides (3-30 mm) and nano-sized metal(II) titanates (30-100 nm).<\/p><\/div><div class=\"item abstract\"><h3 class=\"label\">How to Cite this paper?<\/h3><div class=\"csl-entry\"><p><strong>APA-7 Style<\/strong><br \/>D. L. Han, A. Utenyshev, G. Shilov, N. Lobanov and O. Kovalchukova (2025). Complex Compounds of Ti(IV), Ni(II), Cu(II) and Zn(II) with 3-Hydroxypicolinic acid (3-HPA) and 3,5-Dinitrosalicylic acid (3,5-DNSA) as Precursors of Micro- and Nano-sized Oxides. <a href=\"https:\/\/chempublishers.com\/Pakistan-journal-of-chemistry\/wp-content\/uploads\/sites\/2\/2025\/04\/PJC.v15.i03.p08.pdf\" target=\"_blank\" rel=\"noopener\"><em>Pakistan Journal of Chemistry<\/em>, 15(3), 47-53.<\/a> \u00a0https:\/\/doi.org\/10.15228\/2025.v15.i3.p47-53.<\/p><p><strong>ACS Style<\/strong><br \/>Han. D. L; Utenyshev. A; Shilov. G; Lobanov. N; and Kovalchukova. O; Complex Compounds of Ti(IV), Ni(II), Cu(II) and Zn(II) with 3-Hydroxypicolinic acid (3-HPA) and 3,5-Dinitrosalicylic acid (3,5-DNSA) as Precursors of Micro- and Nano-sized Oxides. <a href=\"https:\/\/chempublishers.com\/Pakistan-journal-of-chemistry\/wp-content\/uploads\/sites\/2\/2025\/04\/PJC.v15.i03.p08.pdf\" target=\"_blank\" rel=\"noopener\"><em>Pakistan Journal of Chemistry<\/em>, 15(3), 47-53.<\/a> \u00a0https:\/\/doi.org\/10.15228\/2025.v15.i3.p47-53.<\/p><p><strong>AMA Style<\/strong><br \/>Han. D. L., Utenyshev. A., Shilov. G., Lobanov. N., and Kovalchukova. O., Complex Compounds of Ti(IV), Ni(II), Cu(II) and Zn(II) with 3-Hydroxypicolinic acid (3-HPA) and 3,5-Dinitrosalicylic acid (3,5-DNSA) as Precursors of Micro- and Nano-sized Oxides. <a href=\"https:\/\/chempublishers.com\/Pakistan-journal-of-chemistry\/wp-content\/uploads\/sites\/2\/2025\/04\/PJC.v15.i03.p08.pdf\" target=\"_blank\" rel=\"noopener\"><em>Pakistan Journal of Chemistry<\/em>, 15(3), 47-53.<\/a> \u00a0https:\/\/doi.org\/10.15228\/2025.v15.i3.p47-53.<\/p><p><strong>Chicago\/Turabian Style<\/strong><br \/>Han DL, Utenyshev A, Shilov G, Lobanov N, and Kovalchukova O &#8220;Complex Compounds of Ti(IV), Ni(II), Cu(II) and Zn(II) with 3-Hydroxypicolinic acid (3-HPA) and 3,5-Dinitrosalicylic acid (3,5-DNSA) as Precursors of Micro- and Nano-sized Oxides&#8221; <em>2025.<\/em> <a href=\"https:\/\/chempublishers.com\/Pakistan-journal-of-chemistry\/wp-content\/uploads\/sites\/2\/2025\/04\/PJC.v15.i03.p08.pdf\" target=\"_blank\" rel=\"noopener\"><em>Pakistan Journal of Chemistry<\/em>, 15(3), 47-53.<\/a> \u00a0https:\/\/doi.org\/10.15228\/2025.v15.i3.p47-53.<\/p><\/div><\/div><div class=\"item copyright\"><p><a href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\" rel=\"license\"><img decoding=\"async\" src=\"https:\/\/i.creativecommons.org\/l\/by\/4.0\/88x31.png\" alt=\"Creative Commons License\" \/><\/a><\/p><p>This work is licensed under a\u00a0<a href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\" rel=\"license\">Creative Commons Attribution 4.0 International License<\/a>.<\/p><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-330976a e-con-full e-flex e-con e-child\" data-id=\"330976a\" data-element_type=\"container\">\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Research Article | Open AccessVolume 15| Issue 3 | Page 47-53 | https:\/\/doi.org\/10.15228\/2025.v15.i3.p08 Complex Compounds of Ti(IV), Ni(II), Cu(II) and Zn(II) with 3-Hydroxypicolinic acid (3-HPA) and 3,5-Dinitrosalicylic acid\u00a0(3,5-DNSA) as Precursors of Micro- and Nano-sized Oxides D. L. HanDepartment of Environmental Chemistry Analytical Institute of Environmental Chemistry Vietnam &#8211; Russia Tropical Center, Hanoi, Vietnam A. UtenyshevKosygin [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7984","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Complex Compounds of Ti(IV), Ni(II), Cu(II) and Zn(II) with 3-Hydroxypicolinic acid (3-HPA) and 3,5-Dinitrosalicylic acid\u00a0(3,5-DNSA) as Precursors of Micro- and Nano-sized Oxides - Pakistan Journal of Chemistry<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/chempublishers.com\/Pakistan-journal-of-chemistry\/2025\/04\/14\/pjc-0825\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Complex Compounds of Ti(IV), Ni(II), Cu(II) and Zn(II) with 3-Hydroxypicolinic acid (3-HPA) and 3,5-Dinitrosalicylic acid\u00a0(3,5-DNSA) as Precursors of Micro- and Nano-sized Oxides - Pakistan Journal of Chemistry\" \/>\n<meta property=\"og:description\" content=\"Research Article | Open AccessVolume 15| Issue 3 | Page 47-53 | https:\/\/doi.org\/10.15228\/2025.v15.i3.p08 Complex Compounds of Ti(IV), Ni(II), Cu(II) and Zn(II) with 3-Hydroxypicolinic acid (3-HPA) and 3,5-Dinitrosalicylic acid\u00a0(3,5-DNSA) as Precursors of Micro- and Nano-sized Oxides D. 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