000			02246cam a2200337 a 4500
003			EG-GiCUC
005			20250223032307.0
008			190525s2018 ua d f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aM.Sc
099			_aCai01.12.20.M.Sc.2018.Di.C
100	0		_aDina Ali Sayed Abdelgawad
245	1	0	_aCharacterization of some new organic-inorganic hybrids / _cDina Ali Sayed Abdelgawad ; Supervised Mohga Farid Mostafa , Ahmed Kamel Mohamed
246	1	5	_aتحديد الخصائص لبعض المهجنات العضوية- غير العضوية
260			_aCairo : _bDina Ali Sayed Abdelgawad , _c2018
300			_a101 P. : _bcharts ; _c25cm
502			_aThesis (M.Sc) - Cairo University - Faculty of Science - Department of Physics
520			_aThe aim of this work is to study structural, thermal, dielectric properties and conductivity of new organic-inorganic hybrids. Results were acquired for two different alkylene-diammonium divalent metal hybrids with chemical formula [(CH₂) (NH₃ )₂ ]MCl₄ . The first has n=7 and M= Ca²⁺ (non-magnetic alkaline earth element), and the second has longer chain n=8 and M=Co²⁺ (a magnetic ion). Powder X-ray diffraction of Ca-hybrid indicated a monoclinic structure (sp.gp. Pm) with a=4.625 {u1EB2}, b= 11.205 {u1EB2}, c= 12.391 {u1EB2} and Ý= 86.82 o, Z= 2, d= 1.63 gm/cm³, V= 641.2 {u1EB2}³. Co-hybrid revealed a triclinic system (sp.gp. P1{u00AF}) with a = 8.368 {u01FA}, b = 12.888 {u01FA}, c = 15.045 {u01FA} and Ü=97.56{u00BA}, Ý= 86.82{u00BA}, Þ=89.82{u00BA}, Z=4, d=1.44 gm/cm³, V= 1597.3{u01FA}³. Thermal measurements showed five phase transitions in the temperature range (260 K-330 K) for Ca and three for Co-hybrid in the temperature range (300 K-420 K). These transitions are reflected in the dielectric behavior
530			_aIssued also as CD
653		4	_aAc conductivity
653		4	_aHybrids
653		4	_aPowder X-ray diffraction
700	0		_aAhmed Kamel Mohamed , _eSupervisor
700	0		_aMohga Farid Mostafa , _eSupervisor
856			_uhttp://172.23.153.220/th.pdf
905			_aAsmaa _eCataloger
905			_aNazla _eRevisor
942			_2ddc _cTH
999			_c72158 _d72158