TWO DIMENSIONAL FOURIER TRANSFORM MICROWAVE SPECTROSCOPY: AUTO CORRELATION SPECTRUM OF 1-CHLORO-1-FLUORO ETHYLENE
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Date
2008
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Ohio State University
Abstract
Two dimensional (2D) microwave spectroscopy experiments were carried out to study the correlations between the rotational energy levels using a novel broadband chirped pulsed Fourier transform microwave spectrometer (CP-FTMW) system. The talk will mainly focus on two dimensional autocorrelation spectrum of 1-Chloro-1-Fluoro Ethylene (CFE). Connectivities and correlations between closely lying nuclear quadrupole hyperfine transitions (due to $^{35 }$ Cl) were clearly observed in the spectra. Both diagonal and off-diagonal peaks were observed in the spectra, similar to COSY experiments in NMR }. Different pulse sequences were used to suppress the diagonal peaks. The large data set was worked up using a MathCAD program with a Kaiser Basel digital filter to obtain the frequency domain spectrum in both dimensions. 2D autocorrelation } and double quantum correlation experiments} were reported earlier on the CFE molecule with only 50 MHz bandwidth. In the present study, we extend this work to higher bandwidths (over 1 GHz) using CP-FTMW technique and monitored several rotational transitions at the same time.
Description
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Author Institution: Department of Chemistry, Purdue University, West Lafayette, IN, 47907
Author Institution: Department of Chemistry, Purdue University, West Lafayette, IN, 47907