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سامح رمضان حامد الجوجرى، استاذ مساعد بقسم: الكيمياء، بكلية: العلوم

أحدث أبحاثى
* one-pot new synthetic method of 3-amino-2-quinoxalinecarbonitrile
* one-pot new synthetic method of 3-amino-2-quinoxalinecarbonitrile
* photoreactivity of psoralen derivatives in micelles: the roles of hydrophobicityand heavy atom substitution

الأبحاث العلمية

Synthesis, photooxygenation, and characterization of new angular furoquinolinone derivatives, a new furocoumarin bioisoster
Journal of the Chinese Chemical Society
Sameh Elgogary
Hoda Abd Elghafar
Mohammad Mashaly
one-pot new synthetic method of 3-amino-2-quinoxalinecarbonitrile
synthetic communications, الصفحات 5, يناير 2010
M. A. WALY
أ.م.د.سامح رمضان حامد الجوجرى
O. Z. EL-SEPELGY
one-pot new synthetic method of 3-amino-2-quinoxalinecarbonitrile
synthetic communication, 1 مايو 2009
M. A. WALY
أ.م.د.سامح رمضان حامد الجوجرى
O. Z. EL-SEPELGY
photoreactivity of psoralen derivatives in micelles: the roles of hydrophobicityand heavy atom substitution
j. photochem. photobiol. b: biology., الصفحات 5, 2007
SAMEH EL-GOGARY, GOTTFRIED GRABNER AND GOTTFRIED K?HLER
أ.م.د.سامح رمضان حامد الجوجرى

PHOTOREACTIVITY OF PSORALEN DERIVATIVES IN MICELLES: THE ROLES OF HYDROPHOBICITY
AND HEAVY ATOM SUBSTITUTION INTERSYSTEM CROSSING QUANTUM YIELDS OF TWO PSORALEN DERIVATIVES, BROMOPSORALEN (BRMOP) AND HEXYLPSORALEN
(8-HOP) WERE MEASURED IN ETHANOL AND WATER BY MEANS OF LASER FLASH PHOTOLYSIS. COMPARED TO
8-METHOXYPSORALEN (8-MOP), THE TRIPLET QUANTUM YIELDS OF BRMOP AND 8-HOP IN ETHANOL ARE INCREASED
BY A FACTOR OF 5 AND 30, RESPECTIVELY, WHILE BRMOP IN AQUEOUS SOLUTION SHOWS A TWOFOLD ENHANCEMENT
WITH RESPECT TO 8-MOP. RADICAL CATIONS AND HYDRATED ELECTRONS WERE GENERATED BY PHOTOIONIZATION IN
MICELLAR SOLUTION UPON EXCITATION AT 266 NM. A NONLINEAR RELATIONSHIP BETWEEN TRANSIENT YIELD AND PHOTON
FLUENCE WAS OBTAINED FOR EACH COMPOUND, INDICATING THAT A TWO-PHOTON MECHANISM IS PREDOMINANT IN THE
PHOTOIONIZATION OF THE SENSITIZERS. THE PHOTOIONIZATION EFFICIENCIES ARE SIGNIFICANTLY HIGHER IN ANIONIC
SODIUM DODECYL SULFATE (SDS) THAN IN CATIONIC CETYLTRIMETHYLAMMONIUM BROMIDE (CTAB) MICELLES, REFLECTING
THE INFLUENCE OF MICELLE CHARGE ON THE EFFICIENCY OF THE SEPARATION OF THE PHOTOPRODUCED CHARGE CARRIERS.
THE PHOTOIONIZATION EFFICIENCIES OF 8-HOP AND 8-MOP ARE SIMILAR. IT IS CONCLUDED THAT THE
INTERSYSTEM CROSSING PROPERTIES OF BRMOP SHOW A SUBSTANTIAL HEAVY ATOM EFFECT, WHEREAS THE EFFECTS OF
HYDROPHOBIC SUBSTITUTION ON PHOTOIONIZATION EFFICIENCY ARE MINOR.
photoreactivity of psoralen derivatives in micelles. the roles of hydrophobicity and heavy atom substitution.
j. photochem. photobiol. b: biology., الصفحات 5, 2007
SAMEH EL-GOGARY, GOTTFRIED GRABNER AND GOTTFRIED K?HLER
أ.م.د.سامح رمضان حامد الجوجرى
utilization of 2,3-dihydroxyquinoxaline in the syntheses of fused quinoxaline ring systems
organic chemistry: an indian journal
M. A. WALY
أ.م.د.سامح رمضان حامد الجوجرى
O. Z. EL-SEPELGY
syntheses and uv absorption of conjugated new quinoxaline-1,4-dioxide derivatives anticipated as a tumor imaging and cytotoxic agents.
monatshefte fur chemie. , الصفحات 10, يوليو 2010
أ.م.د.سامح رمضان حامد الجوجرى
O. Z. EL-SEPELGY
M. A. WALY
د. اسماعيل طه ابراهيم-هيئة الطاقة الذرية
عدد الصفحات (1):  1