Chemical ionization of chloromethanes for matrix isolation spectroscopy

A chemical ionization source from mass spectrometry has been used with CCl4, CHCl3 and CH2Cl2/argon mixtures for matrix isolation spectroscopy in the IR and visible-near UV regions. The major product absorptions in both regions have been observed and assigned previously. The comparison of positive and negative ion operation is striking for CCl4; the yields of CCl+3, CCl+4 and Cl+3 are increased and HCl−2 is not produced in positive ion operation.
Journal of Molecular Structure: THEOCHEM


Chemical ionization discharge of N2O for matrix infrared spectroscopic study of isolated anions
Hacaloğlu, Jale; Andrews, Lester (1990-12-01)
A Townsend discharge chemical ionization source has been used for matrix infrared studies of anions in the argon-N20 system. In addition to neutral products, the NO", N02", (NO)f, NN02", and 03" anions have also been isolated. Filtered visible photolysis shows different behaviors for these anions. The two isomers NN02" and (NO)2" have been identified by isotopic substitution and characterized by different 15N and 180 isotopic shifts and different structures. These matrix isolation experiments provide struct...
Thermal characterization of composites of polyamide-6 and polypropylene involving boron compounds via direct pyrolysis mass spectrometry
İşbaşar Afacan, Güllü Ceyda; Hacaloğlu, Jale; Yılmazer, Ülkü; Department of Polymer Science and Technology (2013)
In this work, the effects of addition of boron compounds, boron phosphate (BPO4), zinc borate (ZnB), borosilicate (BSi) and lanthanum borate (LaB), on thermal degradation characteristics of composites of polyamide 6 (PA6) and polypropylene (PP) are analyzed via Direct Pyrolysis Mass Spectrometry (DP-MS) technique. The composites of PA6 involve nitrogen containing flame retardants, melamine (Me) or melamine cyanurate (MC); or phosphorus containing flame retardant, aluminum diethylphosphinate (AlPi), with or ...
Thermal degradation of poly(p-phenylene-graft-ε-caprolactone) copolymer
Nur, Yusuf; Yurteri, Seda; Cianga, Ioan; Yagci, Yusuf; Hacaloğlu, Jale (2007-01-01)
The thermal degradation of poly (p-phenylene-graft-epsilon-caprolactone) (PPP), synthesized by Suzuki polycondensation of poly(E-caprolactone) (PCL) with a central 2,5-dibromo-1,4-benzene on the chain with 1,4-phenylene-diboronic acid, has been studied via direct pyrolysis mass spectrometry. The thermal degradation occurred mainly in two steps. In the first step, decomposition of PCL chains occurred. A slight increase in thermal stability of PCL chains was noted. In the second stage of pyrolysis, the decomp...
Syntheses and Electrochemical Characterization of Low Oxidation Potential Nitrogen Analogs of Pedot as Electrochromic Materials
Hacioglu, Serife O.; Yigit, Deniz; Ermis, Emel; Soylemez, Saniye; GÜLLÜ, Mustafa; Toppare, Levent Kamil (The Electrochemical Society, 2016-01-01)
In this study, the electropolymerization of ethyl andmethyl substituted asymmetrical nitrogen analogs of 3,4-ethylenedioxythiophene (OEt and OMe) were synthesized, characterized and their electrochemical properties were investigated. Both polymers (POEt and POMe) were synthesized electrochemically and characterized using spectroelectrochemical technique to determine optical changes of the resulting polymer films. Electrochemical studies demonstrated that these polymers exhibited a significantly low oxidatio...
Chemical preparation of the binary compounds of CaO-Al2O3 system by combustion synthesis
Uysal, O; Tas, AC (1997-05-07)
The binary compounds (C(3)A: Ca3Al2O6, C(12)A(7): Ca12Al14O33, CA: CaAl2O4, CA(2): CaAl4O7 and CA(6): CaAl12O19) of CaO-Al2O3 system have been synthesized as high compound-purity ceramic powders by using the Combustion Synthesis (CS) method. Materials characterization of the above-mentioned phases were performed by powder XRD, FTIR, SEM and EDXS. It has hereby been shown that by using this synthesis procedure it would be possible to manufacture high-purity ceramic powders of CA, CA(2), and C(12)A(7) at 850 ...
Citation Formats
J. Hacaloğlu, “Chemical ionization of chloromethanes for matrix isolation spectroscopy,” Journal of Molecular Structure: THEOCHEM, pp. 325–338, 1989, Accessed: 00, 2020. [Online]. Available: