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Hydrothermal synthesis and crystal structures of a novel Keggin-type polyoxometalate based on 1,10-phenanthroline

Yıl 2021, Cilt: 42 Sayı: 1, 22 - 29, 29.03.2021
https://doi.org/10.17776/csj.812164

Öz

Herein a novel inorganic-organic hybrid Keggin-type heteropolymolybdate [Ni2Na(C12H8N2)4(BMo12O40)(H2O)2] (1) has been synthesized under hydrothermal conditions in aqueous solution. The cyrstal structure was fully characterized by powder X-ray diffraction (XRD), elemental analysis, Fourier-tranform infrared spectrum (FT-IR), Thermogravimetric analysis (TGA) and Scanning Electron Microscopy (SEM) analysis. Single crystal X-ray structural analysis demonstrates that the complex consists of a Keggin anion [BMo12O40]5− polyanion, four 1,10-phenanthroline (C12H8N2) ligands, two Ni(II) ions, two Na(I) ions and two aqua ligands. The experimental powder X-ray diffraction (XRD) result of the crystal is consistent with the calculated data. The SEM image shows that the compound crystals have a cubic structure.

Destekleyen Kurum

Necmettin Erbakan University Research Foundation

Kaynakça

  • [1] Gupta R., Parbhakar S., Khan I., Behera J.N., Hussain F., Early lanthanoid substituted organic-inorganic hybrids of silico- and germano-tungstates: Syntheses, crystal structures and solid-state properties, Indian Journal of Chemistry, 57A (2018) 52-58.
  • [2] Rezvani M.A., Khandan S., Synthesis and characterization of new sandwich-type polyoxometalate/nanoceramic anocomposite, Fe2W18Fe4@FeTiO3, as a highly efficient heterogeneous nanocatalyst for desulfurization of fuel, Solid State Sciences, 98 (2019) 106036-106044.
  • [3] Han Z.G., Li S., Wu J.J., Zhai X.L., Hydrothermal synthesis and structural characterization of two new polytungstate-based hybrids, Journal of Coordination Chemistry, 64 (2011) 1525–1532.
  • [4] Mirzaei M., Eshtiagh-Hosseini H., Hassanpoor A., Different behavior of PDA as a preorganized ligand versus PCA ligand in constructing two inorganic-organic hybrid materials based on Keggin-type polyoxometalate, Inorganica Chimica Acta., 484 (2019) 332–337.
  • [5] Yang D.D., Mu B., Lv L., Huang R.D., The assembly of POM-induced inorganic–organic hybrids based on copper ion sand mixed ligands, Journal of Coordination Chemistry, 68 (2015) 752–765.
  • [6] Arichi J., Pereira M.M., Esteves P.M., Louis B., Synthesis of Keggin-type polyoxometalate crystals, Solid State Sciences, 12 (2010) 1866–1869.
  • [7] Lü Y., Xiao N., Hao X.R., Cui X.B., Xu J.Q., A series of organic–inorganic hybrid compounds formed by [P2W18O62]6− and several types of transition metal complexes, Dalton Transactions, 46 (2017) 14393-14405.
  • [8] Wang X., Li T., Tian A., Xu N., Zhang R., Introduction of secondary pyridyl-1H-tetrazole derivatives into Keggin–Ag–(1,10-phenanthroline) system for tuning dimensionalities and architectures: assembly and properties, Journal of Coordination Chemistry, 69 (2016) 2532–2544.
  • [9] Dianat S., Bordbar A.K., Tangestaninejad S., Zarkesh-Esfahani S.H., Habibi P., Kajani A.A., ctDNA interaction of Co-containing Keggin polyoxomolybdate and in vitro antitumor activity of free and its nano-encapsulated derivatives, Journal of The Iranian Chemical Society,13 (2016) 1895-1904.
  • [10] Ucar A., Findik M., Gubbuk I.H., Kocak N., Bingol H., Catalytic degradation of organic dye using reduced grapheneoxide–polyoxometalate nanocomposite, Materials Chemistry and Physics, 196 (2017) 21-28.
  • [11] Bicho R.C., Soares A.M.V.M., Nogueira H.I.S., Amorim M.J.B., Effects of europium polyoxometalate encapsulated in silica nanoparticles (nanocarriers) in soil invertebrates, Journal of Nanoparticle Research, 18 (2016) 360-366.
  • [12] Xia S.L.F., Li X., Cheng F., Sun C., Liu J.J., Guo H., An inorganic–organic hybrid supramolecular framework as a high-performance anode for lithium-ion batterie, Dalton Transactions, 47 (2018) 5166-5170.
  • [13] Ishizuka T., Ohkawa S., Ochiai H., Hashimoto M., Ohkubo K., Kotani H., Sadakane M., Fukuzumi S., Kojima T., A supramolecular photocatalyst composed of a polyoxometalate and a photosensitizing water-soluble porphyrindiacid for the oxidation of organic substrates in wate, Green Chemistry, 20 (2018) 1975-1980.
  • [14] Zhao P., Zhang Y., Li D., Cui H., Zhang L., Mesoporous polyoxometalate-based ionic hybrid as a highly effective heterogeneous catalyst for direct hydroxylation of benzene tophenol, Chinese Journal of Catalysis, 39 (2018) 334-341.
  • [15] Dubal D.P., Chodankar N.R., Vinu A., Kim D.H., Gomez-Romero P., Asymmetric Supercapacitors Based on Reduced Graphene Oxide with Different Polyoxometalates as Positive and Negative Electrodes, Chemsuschem, 10 (2017) 2742-2750.
  • [16] Zhang T.T., Hu Y.Y., Zhang X., Cui X.B., New compounds of polyoxometalates and cadmium mixed-organic-ligand complexes, Journal of Solid State Chemistry, 283 (2020) 121168-121177.
  • [17] Wang J., Niu Y., Zhang M., Ma P., Zhang C., Niu J., Wang J., Organo phosphonate-Functionalized Lanthano polyoxomolybdate: Synthesis, Characterization, Magnetism, Luminescence, and Catalysis of H2O2-Based Thioether Oxidation, Inorganic Chemistry, 57 (2018) 1796-1805.
  • [18] Rafieea E., Pami N., Zinatizadeh A.A., Eavani S., A new polyoxometalate-TiO2 nanocomposite for efficient visible photodegradation of dye from waste water, liquorice and yeast extract: Photoelectrochemical, electrochemical and physical investigations, Journal of Photochemistry & Photobiology A: Chemistry, 386 (2020) 112145-112156.
  • [19] An D., Chen Z., Zheng J. Chen S., Wang L. and Su W., Polyoxomatelate functionalized tris(2,2-bipyridyl)dichlororuthenium(II) as the probe for electrochemiluminescence sensing of histamine, Food Chemistry, 194 (2016) 966–971.
  • [20] Yu X.Y., Cui X.B., Lu J., Luo Y .H., Zhang H., Gao W.P., Five inorganic–organic hybrids based on Keggin polyanion [SiMo12O40]4−: From 0D to 2D network, Journal of Solid State Chemistry, 209 (2014) 97-104.
  • [21] Li S., Ma P., Niu H., Zhao J., Niu J., {[Cu(phen)]3Cl4}2[GeMo12O40]: Synthesis, crystal structure and magnetic property of a new trinuclear copper complex based on germanomolybdate, Inorganic Chemistry Communications, 13 (2010) 805-808.
  • [22] Igarashi T., Zhang Z., Haioka T., Iseki N., Hiyoshi N., Sakaguchi N., Kato C., Nishihara S., Inoue K., Yamamoto A., Yoshida H., Tsunoji N., Ueda W., Sano T., Sadakane M., Synthesis of ε-Keggin-Type Cobaltomolybdate-Based 3D Framework Material and Characterization Using Atomic-Scale HAADF-STEM and XANES, Inorganic Chemistry, 56 (2017) 2042–2049.
  • [23] Findik M., Ucar A., Colak A.T., Sahin O., Bingol H., Sayin U., Kocak N., Self-assembly of a new building block of {BMo12O40} with excellent catalytic activity for methylene blue, Polyhedron, 160 (2019) 229–237.
  • [24] Gang Z., Bond A.M., Zhao C., Recent trends in the use of polyoxometalate-based material for efficient water oxidation, Science China Chemistry, 54 (2011) 1877–1887.
  • [25] Song Y., Tsunashima R., Recent advances on polyoxometalate-based molecular and composite materials, Chemical Society Reviews, 41 (2012) 7384-7402.
  • [26] Alamdari R.F., Zekri N., Moghadam A.J., Farsani M.R., Green oxidation of sulfides to sulfoxides and sulfones with H2O2 catalyzed by ionic liquid compounds based on Keplerate polyoxometalates, Catalysis Communications, 98 (2017) 71–75.
  • [27] Hasannia S., Yadollahi B., Zn–Al LDH nanostructures pillared by Fe substituted Keggin type polyoxometalate: Synthesis, characterization and catalytic effect in green oxidation of alcohols , Polyhedron, 99 (2015) 260–265.
  • [28] Sheldrick G.M., A short history of SHELX, Acta Crystallographica Section A, A64 (2008) 112–122.
  • [29] Sheldrick G.M., Crystal structure refinement with SHELXL, Acta Crystallographica Section C; C71 (2015) 3–8.
  • [30] Farrugia L.J., WinGX and ORTEP for Windows: an update, J. Appl. Cryst., 45 (2012) 849–854.
  • [31] Wang T., Peng J., Liu H., Zhu D., Tian A., Wang L., Open framework complex constructed from polyoxometalate and dinuclear Cu–phenanthroline, Journal of Molecular Structure, 892 (2008) 268–271.
  • [32] Hu Y.Y., Zhang T.T., Zhang X., Zhao D.C., Cui X.B., Huoa Q.S., Xu J.Q., New organic–inorganic hybrid compounds constructed from polyoxometalates and transition metal mixed-organic-ligand complexes, Dalton Transactions, 45 (2016) 2562-2573.
  • [33] Chen Y., Zhou B., Zhao J., Li Y., Su Z., Zhao Z., Two novelh ybrid compounds based on [MW12O40]5− (M=B, Al) heteropolyanions and copper coordination polymer with bpp ligands, Inorganica Chimica Acta, 363 (2010) 3897–3903.
  • [34] Olgun A., Çolak A.T., Gübbük I..H., Şahin O., Kanar E., A new Keggin-type polyoxometalate catalyst for degradation of aqueous organic contaminants, Journal of Molecular Structure, 1134 (2017) 78-84.
  • [35] Chen Y., Gu X., Peng J., Shi Z., Wang E., Hydrothermal synthesis and crystal structure of organic–inorganic hybrid vanadate: [Zn(phen)(H2O)V2O6] (phen=1,10-phenanthroline), Journal of Molecular Structure, 692 (2004) 243-247.
  • [36] Sundararajan M.L., Jeyakumar T., Anandakumaran J., Selvan B.K., Synthesis of metal complexes involving Schiff base ligand with methylenedioxy moiety: Spectral, thermal, XRD and antimicrobial studies, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 131 (2014) 82–93.
  • [37] Iftikhar B., Javed K., Khan M.S.U., Akhter Z., Mirza B., Mckee V., Synthesis, characterization and biological assay of Salicylaldehyde Schiff base Cu(II) complexes and their precursors, Journal of Molecular Structure, 1155 (2018) 337-348.
  • [38] Wang X., Jia G., Yu Y., Gao Y., Zhang W., Wang H., Cao Z., Liu J., A New Homogeneous Electrocatalyst For Electrochemical Carbonylation Of Methanol To Dimethyl Carbonate, Química Nova, 38 (2015) 298-302.
  • [39] Küçük I., Vural S., Kıvılcım N., Adıgüzel I., Köytepe S., Seçkin T., Hydrothermal Synthesis of Polyoxometalate Containing Cobalt Ion and Its Polyurethane Composites for Dielectric Material Applications, Polymer-Plastics Technology And Materials, 59 (2020) 1822-1841.
  • [40] Ge W., Long Z., Cai X., Wang Q., Zhou Y., Xu Y., Wang J., A new polyoxometalate-based Mo/V coordinated crystalline hybrid and its catalytic activity in aerobic hydroxylation of benzene, RSC Advance, 4 (2014) 45816–45822.
  • [41] Zhang B.S., Wu C.S., Qiu J.P., Li Y.X., Liu Z.X., α-Keggin tungstogermanate-supported transition metal complexes: hydrothermal synthesis, characterization, and magnetism of Cu2(phen)4(GeW12O40) and [Ni2(bpy)4(H2O)2(GeW12O40)]2⋅H2O, Journal of Coordination Chemistry, 67 (2014) 787–796."
Yıl 2021, Cilt: 42 Sayı: 1, 22 - 29, 29.03.2021
https://doi.org/10.17776/csj.812164

Öz

Kaynakça

  • [1] Gupta R., Parbhakar S., Khan I., Behera J.N., Hussain F., Early lanthanoid substituted organic-inorganic hybrids of silico- and germano-tungstates: Syntheses, crystal structures and solid-state properties, Indian Journal of Chemistry, 57A (2018) 52-58.
  • [2] Rezvani M.A., Khandan S., Synthesis and characterization of new sandwich-type polyoxometalate/nanoceramic anocomposite, Fe2W18Fe4@FeTiO3, as a highly efficient heterogeneous nanocatalyst for desulfurization of fuel, Solid State Sciences, 98 (2019) 106036-106044.
  • [3] Han Z.G., Li S., Wu J.J., Zhai X.L., Hydrothermal synthesis and structural characterization of two new polytungstate-based hybrids, Journal of Coordination Chemistry, 64 (2011) 1525–1532.
  • [4] Mirzaei M., Eshtiagh-Hosseini H., Hassanpoor A., Different behavior of PDA as a preorganized ligand versus PCA ligand in constructing two inorganic-organic hybrid materials based on Keggin-type polyoxometalate, Inorganica Chimica Acta., 484 (2019) 332–337.
  • [5] Yang D.D., Mu B., Lv L., Huang R.D., The assembly of POM-induced inorganic–organic hybrids based on copper ion sand mixed ligands, Journal of Coordination Chemistry, 68 (2015) 752–765.
  • [6] Arichi J., Pereira M.M., Esteves P.M., Louis B., Synthesis of Keggin-type polyoxometalate crystals, Solid State Sciences, 12 (2010) 1866–1869.
  • [7] Lü Y., Xiao N., Hao X.R., Cui X.B., Xu J.Q., A series of organic–inorganic hybrid compounds formed by [P2W18O62]6− and several types of transition metal complexes, Dalton Transactions, 46 (2017) 14393-14405.
  • [8] Wang X., Li T., Tian A., Xu N., Zhang R., Introduction of secondary pyridyl-1H-tetrazole derivatives into Keggin–Ag–(1,10-phenanthroline) system for tuning dimensionalities and architectures: assembly and properties, Journal of Coordination Chemistry, 69 (2016) 2532–2544.
  • [9] Dianat S., Bordbar A.K., Tangestaninejad S., Zarkesh-Esfahani S.H., Habibi P., Kajani A.A., ctDNA interaction of Co-containing Keggin polyoxomolybdate and in vitro antitumor activity of free and its nano-encapsulated derivatives, Journal of The Iranian Chemical Society,13 (2016) 1895-1904.
  • [10] Ucar A., Findik M., Gubbuk I.H., Kocak N., Bingol H., Catalytic degradation of organic dye using reduced grapheneoxide–polyoxometalate nanocomposite, Materials Chemistry and Physics, 196 (2017) 21-28.
  • [11] Bicho R.C., Soares A.M.V.M., Nogueira H.I.S., Amorim M.J.B., Effects of europium polyoxometalate encapsulated in silica nanoparticles (nanocarriers) in soil invertebrates, Journal of Nanoparticle Research, 18 (2016) 360-366.
  • [12] Xia S.L.F., Li X., Cheng F., Sun C., Liu J.J., Guo H., An inorganic–organic hybrid supramolecular framework as a high-performance anode for lithium-ion batterie, Dalton Transactions, 47 (2018) 5166-5170.
  • [13] Ishizuka T., Ohkawa S., Ochiai H., Hashimoto M., Ohkubo K., Kotani H., Sadakane M., Fukuzumi S., Kojima T., A supramolecular photocatalyst composed of a polyoxometalate and a photosensitizing water-soluble porphyrindiacid for the oxidation of organic substrates in wate, Green Chemistry, 20 (2018) 1975-1980.
  • [14] Zhao P., Zhang Y., Li D., Cui H., Zhang L., Mesoporous polyoxometalate-based ionic hybrid as a highly effective heterogeneous catalyst for direct hydroxylation of benzene tophenol, Chinese Journal of Catalysis, 39 (2018) 334-341.
  • [15] Dubal D.P., Chodankar N.R., Vinu A., Kim D.H., Gomez-Romero P., Asymmetric Supercapacitors Based on Reduced Graphene Oxide with Different Polyoxometalates as Positive and Negative Electrodes, Chemsuschem, 10 (2017) 2742-2750.
  • [16] Zhang T.T., Hu Y.Y., Zhang X., Cui X.B., New compounds of polyoxometalates and cadmium mixed-organic-ligand complexes, Journal of Solid State Chemistry, 283 (2020) 121168-121177.
  • [17] Wang J., Niu Y., Zhang M., Ma P., Zhang C., Niu J., Wang J., Organo phosphonate-Functionalized Lanthano polyoxomolybdate: Synthesis, Characterization, Magnetism, Luminescence, and Catalysis of H2O2-Based Thioether Oxidation, Inorganic Chemistry, 57 (2018) 1796-1805.
  • [18] Rafieea E., Pami N., Zinatizadeh A.A., Eavani S., A new polyoxometalate-TiO2 nanocomposite for efficient visible photodegradation of dye from waste water, liquorice and yeast extract: Photoelectrochemical, electrochemical and physical investigations, Journal of Photochemistry & Photobiology A: Chemistry, 386 (2020) 112145-112156.
  • [19] An D., Chen Z., Zheng J. Chen S., Wang L. and Su W., Polyoxomatelate functionalized tris(2,2-bipyridyl)dichlororuthenium(II) as the probe for electrochemiluminescence sensing of histamine, Food Chemistry, 194 (2016) 966–971.
  • [20] Yu X.Y., Cui X.B., Lu J., Luo Y .H., Zhang H., Gao W.P., Five inorganic–organic hybrids based on Keggin polyanion [SiMo12O40]4−: From 0D to 2D network, Journal of Solid State Chemistry, 209 (2014) 97-104.
  • [21] Li S., Ma P., Niu H., Zhao J., Niu J., {[Cu(phen)]3Cl4}2[GeMo12O40]: Synthesis, crystal structure and magnetic property of a new trinuclear copper complex based on germanomolybdate, Inorganic Chemistry Communications, 13 (2010) 805-808.
  • [22] Igarashi T., Zhang Z., Haioka T., Iseki N., Hiyoshi N., Sakaguchi N., Kato C., Nishihara S., Inoue K., Yamamoto A., Yoshida H., Tsunoji N., Ueda W., Sano T., Sadakane M., Synthesis of ε-Keggin-Type Cobaltomolybdate-Based 3D Framework Material and Characterization Using Atomic-Scale HAADF-STEM and XANES, Inorganic Chemistry, 56 (2017) 2042–2049.
  • [23] Findik M., Ucar A., Colak A.T., Sahin O., Bingol H., Sayin U., Kocak N., Self-assembly of a new building block of {BMo12O40} with excellent catalytic activity for methylene blue, Polyhedron, 160 (2019) 229–237.
  • [24] Gang Z., Bond A.M., Zhao C., Recent trends in the use of polyoxometalate-based material for efficient water oxidation, Science China Chemistry, 54 (2011) 1877–1887.
  • [25] Song Y., Tsunashima R., Recent advances on polyoxometalate-based molecular and composite materials, Chemical Society Reviews, 41 (2012) 7384-7402.
  • [26] Alamdari R.F., Zekri N., Moghadam A.J., Farsani M.R., Green oxidation of sulfides to sulfoxides and sulfones with H2O2 catalyzed by ionic liquid compounds based on Keplerate polyoxometalates, Catalysis Communications, 98 (2017) 71–75.
  • [27] Hasannia S., Yadollahi B., Zn–Al LDH nanostructures pillared by Fe substituted Keggin type polyoxometalate: Synthesis, characterization and catalytic effect in green oxidation of alcohols , Polyhedron, 99 (2015) 260–265.
  • [28] Sheldrick G.M., A short history of SHELX, Acta Crystallographica Section A, A64 (2008) 112–122.
  • [29] Sheldrick G.M., Crystal structure refinement with SHELXL, Acta Crystallographica Section C; C71 (2015) 3–8.
  • [30] Farrugia L.J., WinGX and ORTEP for Windows: an update, J. Appl. Cryst., 45 (2012) 849–854.
  • [31] Wang T., Peng J., Liu H., Zhu D., Tian A., Wang L., Open framework complex constructed from polyoxometalate and dinuclear Cu–phenanthroline, Journal of Molecular Structure, 892 (2008) 268–271.
  • [32] Hu Y.Y., Zhang T.T., Zhang X., Zhao D.C., Cui X.B., Huoa Q.S., Xu J.Q., New organic–inorganic hybrid compounds constructed from polyoxometalates and transition metal mixed-organic-ligand complexes, Dalton Transactions, 45 (2016) 2562-2573.
  • [33] Chen Y., Zhou B., Zhao J., Li Y., Su Z., Zhao Z., Two novelh ybrid compounds based on [MW12O40]5− (M=B, Al) heteropolyanions and copper coordination polymer with bpp ligands, Inorganica Chimica Acta, 363 (2010) 3897–3903.
  • [34] Olgun A., Çolak A.T., Gübbük I..H., Şahin O., Kanar E., A new Keggin-type polyoxometalate catalyst for degradation of aqueous organic contaminants, Journal of Molecular Structure, 1134 (2017) 78-84.
  • [35] Chen Y., Gu X., Peng J., Shi Z., Wang E., Hydrothermal synthesis and crystal structure of organic–inorganic hybrid vanadate: [Zn(phen)(H2O)V2O6] (phen=1,10-phenanthroline), Journal of Molecular Structure, 692 (2004) 243-247.
  • [36] Sundararajan M.L., Jeyakumar T., Anandakumaran J., Selvan B.K., Synthesis of metal complexes involving Schiff base ligand with methylenedioxy moiety: Spectral, thermal, XRD and antimicrobial studies, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 131 (2014) 82–93.
  • [37] Iftikhar B., Javed K., Khan M.S.U., Akhter Z., Mirza B., Mckee V., Synthesis, characterization and biological assay of Salicylaldehyde Schiff base Cu(II) complexes and their precursors, Journal of Molecular Structure, 1155 (2018) 337-348.
  • [38] Wang X., Jia G., Yu Y., Gao Y., Zhang W., Wang H., Cao Z., Liu J., A New Homogeneous Electrocatalyst For Electrochemical Carbonylation Of Methanol To Dimethyl Carbonate, Química Nova, 38 (2015) 298-302.
  • [39] Küçük I., Vural S., Kıvılcım N., Adıgüzel I., Köytepe S., Seçkin T., Hydrothermal Synthesis of Polyoxometalate Containing Cobalt Ion and Its Polyurethane Composites for Dielectric Material Applications, Polymer-Plastics Technology And Materials, 59 (2020) 1822-1841.
  • [40] Ge W., Long Z., Cai X., Wang Q., Zhou Y., Xu Y., Wang J., A new polyoxometalate-based Mo/V coordinated crystalline hybrid and its catalytic activity in aerobic hydroxylation of benzene, RSC Advance, 4 (2014) 45816–45822.
  • [41] Zhang B.S., Wu C.S., Qiu J.P., Li Y.X., Liu Z.X., α-Keggin tungstogermanate-supported transition metal complexes: hydrothermal synthesis, characterization, and magnetism of Cu2(phen)4(GeW12O40) and [Ni2(bpy)4(H2O)2(GeW12O40)]2⋅H2O, Journal of Coordination Chemistry, 67 (2014) 787–796."
Toplam 41 adet kaynakça vardır.

Ayrıntılar

Birincil Dil İngilizce
Bölüm Natural Sciences
Yazarlar

Asuman UÇAR 0000-0003-2674-3120

Mükerrem FINDIK 0000-0002-9441-0814

Nuriye KOÇAK 0000-0002-0531-3538

Alper ÇOLAK 0000-0003-4478-7792

Onur ŞAHİN 0000-0003-3765-3235

Proje Numarası 151210002
Yayımlanma Tarihi 29 Mart 2021
Gönderilme Tarihi 18 Ekim 2020
Kabul Tarihi 21 Ocak 2021
Yayımlandığı Sayı Yıl 2021Cilt: 42 Sayı: 1

Kaynak Göster

APA UÇAR, A., FINDIK, M., KOÇAK, N., ÇOLAK, A., vd. (2021). Hydrothermal synthesis and crystal structures of a novel Keggin-type polyoxometalate based on 1,10-phenanthroline. Cumhuriyet Science Journal, 42(1), 22-29. https://doi.org/10.17776/csj.812164