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Towards a broadband chirped pulse Fourier transform microwave spectrometer

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Abstract

This article gives a brief review of microwave spectroscopy and the experimental techniques used for obtaining microwave spectrum of molecules and complexes since 1950s. It presents a brief summary of the pulsed nozzle Fourier transform microwave (PNFTMW) spectrometer, fabricated in our laboratory, and discusses some of the important results obtained using the spectrometer. The most significant among the results from this spectrometer is the direct structural determination of weakly bound complexes involving H2O/H2S. These have challenged the conventional wisdom on hydrogen bonding leading us to propose a modern definition for the same through IUPAC. The limitations of the PNFTMW spectrometer and the need for the new chirped pulse Fourier transform microwave spectrometer are discussed as well. Moreover, preliminary results from our laboratory on generating a 1 µs chirped pulse of 1 GHz bandwidth are given.

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Acknowledgments

EA acknowledges funding from Department of Science and Technology, Council for Scientific and Industrial Research, Indian Institute of Science, International Union of Pure and Applied Chemistry and the Indo–French Centre for Promotion of Advanced Research. DM acknowledges CSIR for the Junior Research Fellowship.

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Authors and Affiliations

  1. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India

    D. Mani & E. Arunan

  2. Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore, 560012, India

    V. T. Bhat & K. J. Vinoy

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  1. D. Mani
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  2. V. T. Bhat
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  3. K. J. Vinoy
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  4. E. Arunan
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Correspondence to E. Arunan.

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Mani, D., Bhat, V.T., Vinoy, K.J. et al. Towards a broadband chirped pulse Fourier transform microwave spectrometer. Indian J Phys 86, 225–235 (2012). https://doi.org/10.1007/s12648-012-0043-0

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  • DOI: https://doi.org/10.1007/s12648-012-0043-0

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