1.     Ch. Laube, Y. M. Riyad, A. Lotnyk, F. P. Lohmann, C. Kranert, R. Hermann, W. Knolle, Th. Oeckinghaus, R. Reuter, A. Denisenko, A. Kahnt, B. Abel, “Defined functionality and increased luminescence of nanodiamonds for sensoric and diagnostic applications by targeted high temperature reactions and electron beam irradiation”, Mater. Chem. Front. (2017).

2.     M. Berndt-Paetz, A. Weimann, N. Sieger, S. Schastak, Y. M. Riyad, J. Griebel, A. Vinodhkumaradithyaa, J.-U. Stolzenburg, J. Neuhaus, “Tetrahydroporphyrin-Tetratosylat (THPTS): A near-infrared photosensitizer for targated and efficient photodynamic therapy (PDT) of human bladder carcinoma. An in vitro study”, Photodiagnosis Photodyn. Ther. 18 (2017), 244.

3.     Y. M. Riyad, “Thioanisole triplet: Laser flash photolysis and pulse radiolysis studies”, J. Photochem. Photobiol. A 335 (2017) 294.

4.     Y. M. Riyad, Ch. Laube, S. Naumov, R. Hermann, B. Abel, “Complexation and chiral recognition of chiral binaphthyl derivatives and β-cyclodextrins in solution probed by triplet excited state relaxation”, Z. Phys. Chem., 229 (2015) 1831.

5.     Y. M. Riyad, S. Naumov, S. Schastak, J. Griebel, A. Kahnt, T. Haeupl, J. Neuhaus, B. Abel, R. Hermann, “Chemical modification of a tetrapyrrole-type photosensitizer: Tuning application and photochemical action beyond the Singlet oxygen channel”, J. Phys. Chem. B, 118 (2014) 11646.

6.     Y. M. Riyad, S. Naumov, J. Griebel, C. Elsner, R. Hermann, K. R. Siefermann, B. Abel, “Optical switching of azophenol derivatives in solution and in thin polymer films: The role of chemical substitution and environment”, Am. J. Nano Res. Appl., 2 (2014) 39.

7.     Y. M. Riyad, S. Naumov, R. Hermann, B. Abel, “Shedding light into the detailed excited state relaxation pathways and reaction mechanisms of thionaphthol isomers”, J. Phys. Chem. A, 115 (2011) 718.

8.     T. M. Elmorsi, Y. M. Riyad, Z. H. Mohamed, H. M. H. Abd El Bary, “Decolorization of Mordant red 73 azo dye in water using H₂O₂/UV and photo-Fenton treatment”, J. Hazardous Materials, 174 (2010) 352.

9.     T. M. Elmorsi, Y. M. Riyad, Z. H. Mohamed, S. A. Mahmoud, H. M. H. Abd El Bary, “Enhancement of photodegradation of mordant dyes by iron powder and H₂O₂ in presence of UV light”, Environ. Sci. Ind. J., 5 (2010) 215.

10.  Y. M. Riyad, S. Naumov, R. Hermann, O. Brede, B. Abel, “Structure dependence of the photogeneration of thiophenol triplets”, Chem. Phys. Lett., 477 (2009) 290.

11.  Y. M. Riyad, S. Naumov, R. Hermann, O. Brede, “Deactivation of the first excited singlet state of thiophenols”, Phys. Chem. Chem. Phys., 8 (2006)1697.

12.    Y. M. Riyad, R. Hermann, O. Berde, “Quantitative description of the deactivation channels of the first excited singlet state of 2- and 4-thiosalicylic acids”, J. Phys. Chem. A, 109 (2005) 6457.

13.    Y. M. Riyad, R. Hermann, O. Brede, “Reactivity of aromatic thiols toward carbon-centered radicals via hydrogen abstraction reaction: a pulse radiolysis study”, Radiat. Phys. Chem., 72 (2005) 437.

14.  Y. M. Riyad, R. Hermann, O. Brede, “Hidden triplet states of aromatic thiols characterized by radiation-chemical sensitization”, Chem. Phys. Lett., 376 (2003) 776.

15.  M. S. Aboul-Fetouh, T. H. Afifi, F. A. Nassar, Y. M. Riyad, “Equilibrium studies for the adsorption of Reactive Dyestuffs from aqueous solutions using agriculture wastes”, 2^nd International Conference of Pure, Applied and Environmental Chemistry, April 17–20, 2000, Irbid, Jordan.

16.  T. H. Afifi, M. S. Aboul-Fetouh, F. A. Nassar, Y. M. Riyad, “Comparative cost of colour removal from textile effluents using agriculture wastes”, International Conference on Hazardous Waste: Sources, Effects and Management [HAWA], December 12–16, 1998, Cairo, Egypt.

17.  T. H. Afifi, M. S. Aboul-Fetouh, F. A. Nassar, Y. M. Riyad, “Equilibrium studies for the adsorption of direct dyestuffs from aqueous solutions by low-cost materials”, 48^th. Canadian Chemical Engineering Conference, October 4–7, 1998, Ontario, Canada.

18.  T. H. Afifi, M. S. Aboul-Fetouh, F. A. Nassar, Y. M. Riyad, “Low-cost materials for colour removal from industrial effluents”, The Kriton Curi International Symposium on Environmental Management in the Mediterranean Region, June 18–20, Antalya, Turkey.