• Neklyudov V.V, Mikhailova A.N, Al-Muntaser A.A, Zhou Xiaodong, Varfolomeev M.A, Khafizov N.R, Kadkin O.N., and Jorge Ancheyta / Theoretical Substantiation Based on DFT Calculations and Experimental Confirmation of Soft Conditions for Catalytic Aquathermolysis of Heavy Crude Oil // Industrial and Engineering Chemistry Research. - 2025. - Vol. 64, Is.2 - 11879–11887 .

• Khafizov N, Neklyudov V, Mikhailova A, and Kadkin O / Application of quantum chemical calculations for studying thermochemistry, kinetics, and catalytic mechanisms of in situ upgrading//Book chapter in: Catalytic In-Situ Upgrading of Heavy and Extra-Heavy Crude Oils. - 2023. - Wiley - P.382-434.

• Khafizov N.R., Madzhidov T.I., Varfolomeev M.A., Yuan C., Kadkin O.N. / Theoretical insight into the catalytic effect of transition metal ions on the aquathermal degradation of heavy oil: A DFT study of cyclohexyl phenyl ether cleavage // Fuel. - 2022. - Vol.311, Iss. March 1. - Art. №122595.
• Khafizov N.R., Madzhidov T.I., Yuan C., Varfolomeev M.A., Kadkin O.N. /Theoretical insight into the catalytic effect of transition metal ions on the aquathermal degradation of heavy oil: A DFT study of cyclohexyl phenyl amine cleavage//Fuel. - 2022. - Vol.312, Is.. - Art. №123002.
• Kadkin O.N, Mikhailova A.N, Khafizov N.R, Yuan C., Varfolomeev M.A./A molecular mechanics and molecular dynamics study of the structural organization of Cu(II), Ni(II), Co(II), and Fe(II) stearates as potential catalysts for in situ upgrading of heavy oil//Fuel. - 2022. - Vol.313, Is. April 1. - Art. №123056.

• Tverdov Ilya, Khafizov Nail R., Madzhidov Timur I., Varfolomeev Mikhail A., Chengdong Yuan, Kadkin Oleg N. Theoretical Insights into the Catalytic Effect of Transition-Metal Ions on the Aquathermal Degradation of Sulfur-Containing Heavy Oil: A DFT Study of Cyclohexyl Phenyl Sulfide Cleavage//ACS OMEGA. - 2020. - Vol.5, Is.31. - P.19589-19597.

• Kadkin O. N. Quantum-Chemical Study of Adamantane Multiradical Derivatives / O. N. Kadkin, N. R. Khafizov, and R. N. Mukhametgaleev // XXI Mendeleev Congress on General and Applied Chemistry: Book of Abstracts in 6 Volumes. - St. Petersburg, September 9 -13, 2019. - Vol. 6. - P. 83.
• Yurtaeva S.V, Gilmutdinov I.F, Rodionov A.A, Zaripov R.B, Kutyreva M.P, Bondar O.V, Nedopekin O.V, Khafizov N.R, Kadkin O.N, Ferromagnetically Coupled Copper(II) Clusters Incorporated in Functionalized Boltorn H30 Hyperbranched Polymer Architecture: ESR, Magnetic Susceptibility Measurements, and Quantum-Chemical Calculations//ACS Omega. - 2019. - Vol.4, Is.15. - P.16450-16461.

• Yurtaeva S. V. EPR, Magnetic Susceptibility Measurements, and Quantum-Chemical Calculations of Trinuclear Copper(II) Complexes Embedded in Functionalized Hyperbranched Polymer Boltorn H30 / S. Yurtaeva, R. Galeev, M. Kutyreva, N. Khafizov, I. Gilmutdinov, A. Rodionov, R. Zaripov, O. Kadkin // Proceedings of the annual International Conference Modern Development of Magnetic Resonance. – Kazan, 2018. – September 24–28. – P. 195–196.
• Khafizov N.R., Mukhametgaleev R., Madzhidov T.I., Kadkin O.N., Antipin I.S./ Effect of core substituents on the intramolecular exchange interaction in N,N?-dioxy-2,6-diazaadamantane biradical: DFT studies//International Journal of Quantum Chemistry. - 2018. - Vol.118, Is.13. - Art. № e25568.

• Khafizov N.R., Madzhidov T.I., Kadkin O.N., Antipin I.S. Exchange interaction mechanisms in 1,3,5,7-tetramethyl-2,6-diazaadamantane N,N'-dioxyl biradical // Russian Chemical Bulletin. - 2017. - Vol.66, Iss.11. - P. 2028-2034.

• Khafizov N.R. Quantum chemical calculation of exchange interactions in supramolecularly arranged N,N?-dioxy-2,6-diazaadamantane organic biradical / N.R. Khafizov, T.I. Madzhidov, O.N. Kadkin, R. Tamura, I.S. Antipin // International Journal of Quantum Chemistry. - 2016. - Vol.116, Is.14. - P.1064-1070.
• Khafizov N. R. Effect of Substituents on the Parameter of Intramolecular Exchange Interaction in N,N'-Dioxy-2,6-Diazaadamantane Biradical / N. R. Khafizov, T. I. Madzhidov, O. N. Kadkin, I. S. Antipin // ХX Менделеевский cъезд по общей и прикладной химии: тезисы докладов в пяти томах. - Уральское отделение Российской академии наук, 2016. - C. 139.
  Hafizov_HHMendeleevskijSezd.pdf
• Kadkin O. N. Elucidating Mechanisms of Intramolecular Exchange Interaction in Substituted N,N'-Dioxy-2,6-Diazaadamantane Biradicals / O. N. Kadkin, N. R. Khafizov, T. I. Madzhidov, I. S. Antipin // Modern Development of Magnetic Resonance: Proceedings of International Conference. - Kazan, 2016. - P. 146-147.
  F_Kadkin_abstarct.output.pdf

• Kadkin O. N. Using Supramolecular Approaches for the Development of Soft Materials with Unusual Properties / O. N. Kadkin, A.V. Bilalov, T.I. Madzhidov, N.R. Khafizov // Proc. of the Korea–Russia Seminar on Science and Technology. - Khabarovsk (Russia). - 2015. - P. 81–82.
• Кадкин О. Н. Металломезогены: ретроспективный и перспективный взгляд / О. Н. Кадкин, Н. Е. Домрачева, И. В. Овчинников // Жидкие кристаллы и их практическое использование. - 2015. - №4. - С. 21-39.
  Metallomezogeny_obzor.pdf

• Khafizov N. R. Computer Simulation of the Magnetic Exchange Interactions in Small Clusters of the Hypotethical Organic Biradical / N. R. Khafizov, T. I. Madzhidov, O. N. Kadkin, R. Tamura, I. S. Antipin // Proc. of the VII International Conference on Nitroxide Radicals (SPIN-2014), Zelenogradsk, Kaliningrad region (Russia). - 2014. - P. 73–74.

• O. N. Kadkin, Yu. G. Galyametdinov, Ferrocene-containing liquid crystals, Russ. Chem. Rev., 2012, V. 81, Iss. 8, 675–699.
  F_Kadkin_2012_Russ_Chem_Rev_81_R01.pdf
• Кадкин О. Н. Ферроценсодержащие жидкие кристаллы / О. Н. Кадкин, Ю. Г. Галяметдинов // Успехи химии. - 2012. - Т. 81. - № 8. - С. 675-699.
  F_Usp_himii_obzor.pdf

• So Yeon Kim, Oleg N. Kadkin, Eun Ho Kim, Moon-Gun Choi / Phase Behavior of Some Mono-Substituted Ferrocene- and [3]Ferrocenophane-Containing Nematics with the Cyclohexane Ring in the Rigid Core // Journal of Organometallic Chemistry. - 2011. - V. 696. - P. 2429-2437.
  F_Kadkin_JOrganometChem.pdf
• Eun Ho Kim, Oleg Nikolaevich Kadkin, So Yeon Kim, and Moon-Gun Choi / Tetrahedratic Mesophases, Ambidextrous Chiral Domains and Helical Superstructures Produced by Achiral 1,1'-Disubstituted Ferrocene Derivatives // Eur. J. Inorg. Chem. - 2011. - P. 2933-2941.
  F_Kadkin_EurJInorgChem.pdf

• Kim E. H. Chiral Segregation in 1,1'-Bis Substituted Ferrocenomesogens / O. N. Kadkin, E. H. Kim, S. Y. Kim, Y. J. Rha, M.-G. Choi // Proc. of the 239th ACS National Meeting, San-Francisco, CA (U.S.A.). - 2010. - P. 396.
• Kadkin O. N. Effect of Hydrogen-Bonded Supramolecular Assembling on Liquid Crystal Properties of Imidazole-Containing Azomethines and Their Chelates With Copper(II) / Oleg N. Kadkin, Jigeon Tae, Eun Ho Kim, So Yeon Kim, Moon-Gun Choi // Supramolecular Chemistry. - 2010. - Vol. 22. - Iss. 1. - P. 1-12.
  F_kadkin2010.pdf

• Oleg N. Kadkin,* Eun Ho Kim, Young Joon Rha, So Yeon Kim, Jigeon Tae, and Moon-Gun Choi / Novel Tetrahedratic Smectic C and Nematic Mesophases in Unsymmetrically 1,1'-Bis-substituted Ferrocenomesogens // Chem. Eur. J. 2009. - V. 15. - P. 10343-10347.
  Kadkin_ChemEur.pdf
• Kadkin O. N. Synthesis and Liquid Crystal Properties of Copper(II) and Palladium(II) Chelates with New Ferrocene-Containing Enaminoketones / O. N. Kadkin, E. H. Kim, S. Y. Kim, M.-G. Choi // Polyhedron. - 2009. - V. 28. - iss. 7. - P. 1301-1307.
  KadkinPolyhedr.pdf
• Kadkin O. N. Liquid Crystalline Properties Generated by Supramolecular Self-Assembly of Taper-Shaped Imidazoles / O. N. Kadkin, J. Tae, E. H. Kim, S. Y. Kim, Y. J. Rha, M.-G. Choi // Proc. of the 1st International Symposium on Liquid Crystal Science and Technology, Kunming (China). - 2009. - P. 143.
• Rha Y. J. Structural Variations, Molecular Geometry and Liquid Crystalline Behavior of Tetra-, Tri-, and Diphenylmethane Derivatives / Y. J. Rha, O. N. Kadkin, M.-G. Choi // Proc. of the 104th National Meeting of the Korean Chemical Society, Dae Jeon (Korea). - 2009. - P. 1083.
• Chae H. W. New Heteropolynuclear Metallomesogens: Copper(II), Palladium(II), Nickel(II) and Oxovanadium(IV) Chelates with [3]Ferrocenophane-Containing Schiff's Base and b-aminovinylketone / H. W. Chae, O. N. Kadkin, M.-G. Choi // Liquid Crystals. - 2009. - V. 36. - iss. 1. - P. 53–60.
  F_chae2009.pdf
• Kadkin O. N. Structure–Property Relationships in Novel Mesophases with Tetrahedratic Order on the Base of 1,1'-Bis Substituted Ferrocene / O. N. Kadkin, E. H. Kim, Y. J. Rha, S. Y. Kim, M.-G. Choi // Proc. of the 12-th International Conference on Ferroelectric Liquid Crystals, Zaragosa (Spain). - 2009. - P. B-01.
• Kadkin O. N. Spontaneous Chiral Degeneracy in Aciral Ferrocenomesogen and Novel Mesophases with Tetrahedral Symmetry / O. N. Kadkin, E. H. Kim, Y. J. Rha, S. Y. Kim, M.-G. Choi // Proc. of the 12-th International Conference on Ferroelectric Liquid Crystals, Zaragosa (Spain). - 2009. - P. P-022.
• Kadkin O. N. Liquid Crystal Phases Generated by Supramolecular Self-Assembly of Biforked Amphiphilic Imidazoles / O. N. Kadkin, J. Tae, S.Y. Kim, E.H. Kim, E. Lee, M.-G. Choi // Liquid Crystals. - 2009. - V. 36. - iss. 12. - P. 1337–1347.
  F_kadkin2009.pdf
• Kadkin O. N. Hydrogen-Bonded Self-Assembled Superstructures and Liquid Crystal Properties of Imidazole-Containing Schiff's Bases / O. N. Kadkin, J. Tae, E. H. Kim, S. Y. Kim, M.-G. Choi // Proc. of the 5-th Intenational Symposium in Supramolecular Chemistry, Kazan (Russia). - 2009. - P. 167.