Pulsed Nozzle Fourier Transform Microwave Spectrometer: Advances and Applications

Arunan, E.; Dev, Sagarika; Mandal, Pankaj

doi:10.1081/asr-120030906

Cited by 38 publications

(37 citation statements)

References 172 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, C 6 H 5 D has a small observable dipole moment and its rotational spectrum has been observed [23]. It has a C constant (2749.7 MHz) which is also close to the A rotational constant (2765.5 MHz) of the corresponding water dimers, C 6 H 5 D-H 2 O/C 6 H 5 D-D 2 O [6,20]. Thus, a direct determination of C rotational constants of mono-substituted benzene isotopomers is possible from the data given here.…”

Section: Resultsmentioning

confidence: 91%

“…Thus, a direct determination of C rotational constants of mono-substituted benzene isotopomers is possible from the data given here. In these complexes, water acts as an electrophore [20] for the determination of rotational constants of 13 CC 5 H 6 and C 6 H 5 D.…”

Section: Resultsmentioning

confidence: 99%

“…The experimental spectra were obtained with the Balle-Flygare spectrometer described elsewhere [6]. The details of the spectrometer and its applications have been summarized in a recent review [20]. The 13 CC 5 H 6 -H 2 O lines could be unambiguously assigned using the 13 C depleted benzene and it turned out to be quite useful in the assignment.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Rotational spectra of mono-substituted asymmetric C6H6–H2O dimers

Prasad

Krishnan

Arunan

2005

Journal of Molecular Spectroscopy

Self Cite

View full text Add to dashboard Cite

This paper reports the assignment of the rotational spectra of the m = 0 and 1 states of 13 CC 5 H 6 -H 2 O and C 6 H 5 D-H 2 O dimers. The m = 1 progression was not identified or assigned for both 13 CC 5 H 6 -H 2 O and C 6 H 5 D-H 2 O in the earlier work, though for the symmetric isotopomers (C 6 H 6 -H 2 O/D 2 O/H 2 18 O), they were identified [H.S. Gutowsky, T. Emilsson, E. Arunan, J. Chem. Phys. 99 (1993) 4883]. The m = 1 transitions for 13 CC 5 H 6 -H 2 O and C 6 H 5 D-H 2 O were split into two, unlike that of the parent C 6 H 6 -H 2 O isotopomer. The splitting varied, somewhat randomly, with quantum numbers J and K. The m = 0 lines of 13 CC 5 H 6 -H 2 O had significant overlap with the m = 1 lines of the parent isotopomer, clouding proper assignment, and leading to an rms deviation of about 200 kHz in the earlier work. The general semi-rigid molecular Hamiltonian coupled to an internal rotor, described recently by Duan et al. [Y.B. Duan, H.M. Zhang, K. Takagi, J. Chem. Phys. 104 (1996) 3914], is used in this work to assign both m = 0 and 1 states of 13 CC 5 H 6 -H 2 O and C 6 H 5 D-H 2 O dimers. Consequently, the m = 0 fits for 13 CC 5 H 6 -H 2 O/D 2 O have an rms deviation of only 4/ 7 kHz, comparable to experimental uncertainties. The fits for m = 1 transitions for 13 CC 5 H 6 -H 2 O and C 6 H 5 D-H 2 O dimers have an rms deviation of about 200 kHz.However, it is of the same order of magnitude as that of the m = 1 state of the parent C 6 H 6 -H 2 O dimer. The A rotational constants determined from the m = 0 fits for both 13 CC 5 H 6 -H 2 O and 13 CC 5 H 6 -D 2 O isotopomers are identical and very close to the C rotational constant for 13 CC 5 H 6 . This provides a direct experimental determination for the C rotational constant of 13 CC 5 H 6 , which has a negligible dipole moment.

show abstract

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Rotational spectra of mono-substituted asymmetric C6H6–H2O dimers

Prasad

Krishnan

Arunan

2005

Journal of Molecular Spectroscopy

Self Cite

View full text Add to dashboard Cite

show abstract

“…Though IR and NMR spectroscopy offer direct experimental criteria indicating the formation of hydrogen bonds, spectroscopy in every region of the electromagnetic spectrum has contributed to the growing knowledge of the hydrogen bond phenomenon. Microwave spectroscopy in a supersonic beam has provided a wealth of structural information of isolated hydrogen-bonded complexes [134,135]. Moreover, in complexes containing a quadrupolar nuclei, such as 14 N or 35 Cl, the quadrupolar coupling constants can change due to the distortion of electronic environment around these atoms, following hydrogen bond formation [77,136].…”

Section: Spectroscopic Evidencementioning

confidence: 99%

Defining the hydrogen bond: An account (IUPAC Technical Report)

Arunan

Desiraju

Klein³

et al. 2011

Pure and Applied Chemistry

919

622

View full text Add to dashboard Cite

Abstract:The term "hydrogen bond" has been used in the literature for nearly a century now. While its importance has been realized by physicists, chemists, biologists, and material scientists, there has been a continual debate about what this term means. This debate has intensified following some important experimental results, especially in the last decade, which questioned the basis of the traditional view on hydrogen bonding. Most important among them are the direct experimental evidence for a partial covalent nature and the observation of a blue-shift in stretching frequency following X-HؒؒؒY hydrogen bond formation (XH being the hydrogen bond donor and Y being the hydrogen bond acceptor). Considering the recent experimental and theoretical advances, we have proposed a new definition of the hydrogen bond, which emphasizes the need for evidence. A list of criteria has been provided, and these can be used as evidence for the hydrogen bond formation. This list is followed by some characteristics that are observed in typical hydrogen-bonding environments.

show abstract

“…This has aided the successful astronomical observation of some of these linear carbon chain species. However, the fact that some of the experimental conditions; precise dilution factor, the right choices for the precursor and inert gases, parameters of the electrical discharge source cannot be specifically controlled has made the approach 'hit or miss' as one can only probe what is produced from the source but cannot specifically control what is produced (McCarthy et al, 1997Thaddeus et al, 1998;Arunan et al, 2004). As a result, a number of species like the ions that are known not only to be present and detectable in ISM but also to be playing important role in the formation processes of other molecules in space cannot be detected because of the lack of accurate spectroscopic parameters.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy of Linear Interstellar Carbon Chain Isotopologues: Meeting Experimental Accuracy

Etim¹

2017

TJANS

View full text Add to dashboard Cite

Pulsed Nozzle Fourier Transform Microwave Spectrometer: Advances and Applications

Cited by 38 publications

References 172 publications

Rotational spectra of mono-substituted asymmetric C6H6–H2O dimers

Rotational spectra of mono-substituted asymmetric C6H6–H2O dimers

Defining the hydrogen bond: An account (IUPAC Technical Report)

Spectroscopy of Linear Interstellar Carbon Chain Isotopologues: Meeting Experimental Accuracy

Contact Info

Product

Resources

About