Katı durumdaki glycine tertbutyl ester hydrochloride and L-α-alanin eter ester’de oluşan serbest radikallerin similasyon metodu ile incelenmesi

Year 2020, , 262 - 266, 31.01.2020

Yunus Emre Osmanoğlu

https://doi.org/10.31202/ecjse.630855

Abstract

Gama ışınlaması sonucu glycine tertbutyl ester hydrochloride and L-α-alanin
eter ester’de oluşan paramagnetik merkezler belirlenmiştir. EPR
spektroskopisinde elde edilen deneysel spektrumlar, H₂NĊHCO₂C(CH₃)₃.HCl
and CH₃ĊHCOCH₂CH₃ paramagnetik merkezlere
(radikallarine) atfedilmiştir. Bu spektrumlardan elde edilen magnetik değerler
kaydedilmiştir. Paramagnetik merkezlerin oda sıcaklığında 2 ay kararlı
(sönmediği) kaldığı görüldü. Ayrıca, magnetik parametreler ve paramagnetik
merkezin elektronik yapısı similasyon metoduyla doğrulanmıştır.

Keywords

Elektron Paramagnetik Rezonans, Paramagnetik merkez

Simulation Study of Paramagnetic Centers Induced in Glycine Tertbutyl Ester Hydrochloride and L-α-alanine Ethyl Ester in Solid State

Abstract

The paramagnetic
centers formed in glycine tert-butyl ester hydrochloride and L-α-alanine ethyl
ester after irradiated was determined using EPR spectroscopy. The EPR spectra
of the samples were attributed to the H₂NĊHCO₂C(CH₃)₃.HCl
and CH₃ĊHCOCH₂CH₃ radicals,
respectively. The magnetic parameters obtained from the spectra were evaluated.
The spectra were seen to be stable for more than 2 months at 300 K. Magnetic
parameters and the electronic structure of the paramagnetic centers (radicals)
were determined with a simulation method.

Keywords

Electron paramagnetic resonance; paramagnetic center; amino acid; irradiation; simulation method

References

• [1] Guo, X.; Chang, C.; Lam, E.Y.; J. Mag. Reson. 2010, 204, 26-36.
• [2} Swartz, H.M.; Bolton, J.R.; Borg, D.C.; Biological Applications of Electron Spin Resonance, Wiley, New York, 1972.
• [3] Ogawa, M.; Ishigure, K.; Oshima, K.; Radiat. Phys. Chem. 1980, 16, 281-287.
• [4] Salih, N.A.; Eid, O.I.; Benetis, N:P.; Lindgren, M.; Lund, A.; Sagstuen, E.; J. Chem. Phys. 1996, 212, 409-419.
• [5] Aydın, M.; Osmanoğlu, Y.E.; Romanian J. Phys. 2011, 56, 1156-1161.
• [6] Sinclair, J.; J. Chem. Phys. 1971, 55, 245-251.
• [7] Poupko, R.; Loewenstein, A.; Silver, B.L.; J. Am. Chem. Soc. 1971, 93, 580-586.
• [8] Ciesielski, B.; Schultka, K.; Penkowiski, M.; Sagstuen, E.; Spectrochim. Acta Part A. 2004, 60, 13127-1333.
• [9] Shields, H.; Hamrick, P.; Delaigle, D.; J. Chem. Phys. 1967, 46, 3649-3652.
• [10] Bešić, E.; J. Mol. Struct. 2009, 917, 71-75.
• [11] Köksal, F.; Osmanoglu, Ş.; Kartal, I.; Ucun, F.; Radiat. Phys. Chem. 1997, 49, 537-539.
• [12] Osmanoğlu, Ş.; Aydın, M.; Başkan, M.H.; Z. Naturforch 2005, 60, 549-553.
• [13] Prasad, B. B.; Jaiswal, S.; Singh, K.; Actuators B Chem. 2017, 240, 631-639.
• [14] Sinclair, J.;, J. Chem. Phys. 1971, 55, 1, 245-251.
• [15] Rosenthal, I., Poupko, R.; Elad, D.; J.PC, 1973, 77,16, 1944-1948.
• [16] Osmanoğlu, Y.E.; Sütçü, K.; Osmanoğlu, Ş.;. Radiat.eff. and deff. in Solid, 2017, 172, 621-628..
• [17] Yutaka, K.; Hitoshi, T.; J. Amer. Chem. Soc. 1975, 5089-5096.
• [18] Bugay, A.A.; Onischuk, V.A.; Petrenko, T.L.; Teslenko, V.V.; Appl. Radiat. Isot. 2000, 52, 1189-1193.
• [19] Sütçü, K.; Osmanoğlu, Y.; J. Molecular Structure, 2017, 1149, 593-595.
• [20] Sanderud, A.; Sagstuen, E.; J. Phys. Chem. B, 1998, 102, 9353-9361
• [21] Morton, J.R. J. Am. Chem. Soc. 1964, 86,2325.
• [22] Horsfield, D.; Morton, J.R.; Whiffen, D.H.;, Mol. Phys. 1961, 4, 425.
• [23] Aydın, M.; Başkan, M.H.; Yakar, S.; Ulak, F.; Aydınol, M.; Aydınol, B.; Büyüm M.;. Radiat. Eff. & Def. in Solids, 2008, 163, 41-46.
• [24] Başkan, M.H.; Aydn, M.;. Spectrochim. Acta A, 2013, 112, 280-282.