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Showing 1 to 12 of 17 entries
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Vacuum ultraviolet photoabsorption of prime ice analogues of Pluto and Charon.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Pavithraa S, Lo JI, Rahul K, Raja Sekhar BN, Cheng BM, Mason NJ, Sivaraman B.
PMID: 28922643
Spectrochim Acta A Mol Biomol Spectrosc. 2018 Feb 05;190:172-176. doi: 10.1016/j.saa.2017.08.060. Epub 2017 Aug 26.

Here we present the first Vacuum UltraViolet (VUV) photoabsorption spectra of ice analogues of Pluto and Charon ice mixtures. For Pluto the ice analogue is an icy mixture containing nitrogen (N

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Pavithraa S, Lo JI, Rahul K, et al. Vacuum ultraviolet photoabsorption of prime ice analogues of Pluto and Charon. Spectrochim Acta A Mol Biomol Spectrosc. 2017;190:172-176doi: 10.1016/j.saa.2017.08.060.
Pavithraa, S., Lo, J. I., Rahul, K., Raja Sekhar, B. N., Cheng, B. M., Mason, N. J., & Sivaraman, B. (2018). Vacuum ultraviolet photoabsorption of prime ice analogues of Pluto and Charon. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 190172-176. https://doi.org/10.1016/j.saa.2017.08.060
Pavithraa, S, et al. "Vacuum ultraviolet photoabsorption of prime ice analogues of Pluto and Charon." Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy vol. 190 (2018): 172-176. doi: https://doi.org/10.1016/j.saa.2017.08.060
Pavithraa S, Lo JI, Rahul K, Raja Sekhar BN, Cheng BM, Mason NJ, Sivaraman B. Vacuum ultraviolet photoabsorption of prime ice analogues of Pluto and Charon. Spectrochim Acta A Mol Biomol Spectrosc. 2018 Feb 05;190:172-176. doi: 10.1016/j.saa.2017.08.060. Epub 2017 Aug 26. PMID: 28922643.
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Development of an experimental set-up for low-temperature spectroscopic studies of matrix-isolated molecules and molecular ices using synchrotron radiation.

Journal of synchrotron radiation

Singh PJ, Sundararajan K, Shastri A, Kumar V, Das AK, Kush PK, Raja Sekhar BN.
PMID: 30179182
J Synchrotron Radiat. 2018 Sep 01;25:1425-1432. doi: 10.1107/S1600577518010482. Epub 2018 Aug 22.

An experimental set-up for studying photophysics and photochemistry of molecules in an inert gas medium (matrix-isolated) and in the ice phase at low temperatures has been developed and commissioned at the Photophysics beamline, Indus-1 synchrotron radiation source. This end-station...

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Singh PJ, Sundararajan K, Shastri A, et al. Development of an experimental set-up for low-temperature spectroscopic studies of matrix-isolated molecules and molecular ices using synchrotron radiation. J Synchrotron Radiat. 2018;25:1425-1432doi: 10.1107/S1600577518010482.
Singh, P. J., Sundararajan, K., Shastri, A., Kumar, V., Das, A. K., Kush, P. K., & Raja Sekhar, B. N. (2018). Development of an experimental set-up for low-temperature spectroscopic studies of matrix-isolated molecules and molecular ices using synchrotron radiation. Journal of synchrotron radiation, 251425-1432. https://doi.org/10.1107/S1600577518010482
Singh, Param Jeet, et al. "Development of an experimental set-up for low-temperature spectroscopic studies of matrix-isolated molecules and molecular ices using synchrotron radiation." Journal of synchrotron radiation vol. 25 (2018): 1425-1432. doi: https://doi.org/10.1107/S1600577518010482
Singh PJ, Sundararajan K, Shastri A, Kumar V, Das AK, Kush PK, Raja Sekhar BN. Development of an experimental set-up for low-temperature spectroscopic studies of matrix-isolated molecules and molecular ices using synchrotron radiation. J Synchrotron Radiat. 2018 Sep 01;25:1425-1432. doi: 10.1107/S1600577518010482. Epub 2018 Aug 22. PMID: 30179182.
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UV/Vis.

Journal of quantitative spectroscopy & radiative transfer

Noelle A, Vandaele AC, Martin-Torres J, Yuan C, Rajasekhar BN, Fahr A, Hartmann GK, Lary D, Lee YP, Limão-Vieira P, Locht R, McNeill K, Orlando JJ, Salama F, Wayne RP.
PMID: 34121770
J Quant Spectrosc Radiat Transf. 2020 Sep 01;253. doi: 10.1016/j.jqsrt.2020.107056.

The "science-softCon UV/Vis

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Noelle A, Vandaele AC, Martin-Torres J, et al. UV/Vis. J Quant Spectrosc Radiat Transf. 2020;253doi: 10.1016/j.jqsrt.2020.107056.
Noelle, A., Vandaele, A. C., Martin-Torres, J., Yuan, C., Rajasekhar, B. N., Fahr, A., Hartmann, G. K., Lary, D., Lee, Y. P., Limão-Vieira, P., Locht, R., McNeill, K., Orlando, J. J., Salama, F., & Wayne, R. P. (2020). UV/Vis. Journal of quantitative spectroscopy & radiative transfer, 253. https://doi.org/10.1016/j.jqsrt.2020.107056
Noelle, Andreas, et al. "UV/Vis." Journal of quantitative spectroscopy & radiative transfer vol. 253 (2020). doi: https://doi.org/10.1016/j.jqsrt.2020.107056
Noelle A, Vandaele AC, Martin-Torres J, Yuan C, Rajasekhar BN, Fahr A, Hartmann GK, Lary D, Lee YP, Limão-Vieira P, Locht R, McNeill K, Orlando JJ, Salama F, Wayne RP. UV/Vis. J Quant Spectrosc Radiat Transf. 2020 Sep 01;253. doi: 10.1016/j.jqsrt.2020.107056. PMID: 34121770; PMCID: PMC8193824.
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Residue from vacuum ultraviolet irradiation of benzene ices: Insights into the physical structure of astrophysical dust.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Rahul KK, Shivakarthik E, Meka JK, Das A, Chandrasekaran V, Rajasekhar BN, Lo JI, Cheng BM, Janardhan P, Bhardwaj A, Mason NJ, Sivaraman B.
PMID: 31837964
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Apr 15;231:117797. doi: 10.1016/j.saa.2019.117797. Epub 2019 Nov 13.

We have irradiated benzene ices deposited at 4 K on a cold, interstellar dust analog with vacuum ultraviolet (9 eV) irradiation for periods lasting from several hours to nearly a day, after which the irradiated ice was warmed to...

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Rahul KK, Shivakarthik E, Meka JK, et al. Residue from vacuum ultraviolet irradiation of benzene ices: Insights into the physical structure of astrophysical dust. Spectrochim Acta A Mol Biomol Spectrosc. 2019;231:117797doi: 10.1016/j.saa.2019.117797.
Rahul, K. K., Shivakarthik, E., Meka, J. K., Das, A., Chandrasekaran, V., Rajasekhar, B. N., Lo, J. I., Cheng, B. M., Janardhan, P., Bhardwaj, A., Mason, N. J., & Sivaraman, B. (2020). Residue from vacuum ultraviolet irradiation of benzene ices: Insights into the physical structure of astrophysical dust. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 231117797. https://doi.org/10.1016/j.saa.2019.117797
Rahul, K K, et al. "Residue from vacuum ultraviolet irradiation of benzene ices: Insights into the physical structure of astrophysical dust." Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy vol. 231 (2020): 117797. doi: https://doi.org/10.1016/j.saa.2019.117797
Rahul KK, Shivakarthik E, Meka JK, Das A, Chandrasekaran V, Rajasekhar BN, Lo JI, Cheng BM, Janardhan P, Bhardwaj A, Mason NJ, Sivaraman B. Residue from vacuum ultraviolet irradiation of benzene ices: Insights into the physical structure of astrophysical dust. Spectrochim Acta A Mol Biomol Spectrosc. 2020 Apr 15;231:117797. doi: 10.1016/j.saa.2019.117797. Epub 2019 Nov 13. PMID: 31837964.
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Qualitative observation of reversible phase change in astrochemical ethanethiol ices using infrared spectroscopy.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Pavithraa S, Methikkalam RRJ, Gorai P, Lo JI, Das A, Raja Sekhar BN, Pradeep T, Cheng BM, Mason NJ, Sivaraman B.
PMID: 28187314
Spectrochim Acta A Mol Biomol Spectrosc. 2017 May 05;178:166-170. doi: 10.1016/j.saa.2017.01.023. Epub 2017 Jan 12.

Here we report the first evidence for a reversible phase change in an ethanethiol ice prepared under astrochemical conditions. InfraRed (IR) spectroscopy was used to monitor the morphology of the ice using the SH stretching vibration, a characteristic vibration...

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Pavithraa S, Methikkalam RRJ, Gorai P, et al. Qualitative observation of reversible phase change in astrochemical ethanethiol ices using infrared spectroscopy. Spectrochim Acta A Mol Biomol Spectrosc. 2017;178:166-170doi: 10.1016/j.saa.2017.01.023.
Pavithraa, S., Methikkalam, R. R. J., Gorai, P., Lo, J. I., Das, A., Raja Sekhar, B. N., Pradeep, T., Cheng, B. M., Mason, N. J., & Sivaraman, B. (2017). Qualitative observation of reversible phase change in astrochemical ethanethiol ices using infrared spectroscopy. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 178166-170. https://doi.org/10.1016/j.saa.2017.01.023
Pavithraa, S, et al. "Qualitative observation of reversible phase change in astrochemical ethanethiol ices using infrared spectroscopy." Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy vol. 178 (2017): 166-170. doi: https://doi.org/10.1016/j.saa.2017.01.023
Pavithraa S, Methikkalam RRJ, Gorai P, Lo JI, Das A, Raja Sekhar BN, Pradeep T, Cheng BM, Mason NJ, Sivaraman B. Qualitative observation of reversible phase change in astrochemical ethanethiol ices using infrared spectroscopy. Spectrochim Acta A Mol Biomol Spectrosc. 2017 May 05;178:166-170. doi: 10.1016/j.saa.2017.01.023. Epub 2017 Jan 12. PMID: 28187314.
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Electronic spectroscopy of ethyl bromide probed by VUV photoabsorption and quantum chemical calculations.

Physical chemistry chemical physics : PCCP

Shastri A, Singh PJ, Krishnakumar S, Das AK, Raja Sekhar BN.
PMID: 28197565
Phys Chem Chem Phys. 2017 Mar 01;19(9):6454-6469. doi: 10.1039/c6cp07330a.

The electronically excited states of ethyl bromide and its deuterated isotopologue (C

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Shastri A, Singh PJ, Krishnakumar S, et al. Electronic spectroscopy of ethyl bromide probed by VUV photoabsorption and quantum chemical calculations. Phys Chem Chem Phys. 2017;19(9):6454-6469doi: 10.1039/c6cp07330a.
Shastri, A., Singh, P. J., Krishnakumar, S., Das, A. K., & Raja Sekhar, B. N. (2017). Electronic spectroscopy of ethyl bromide probed by VUV photoabsorption and quantum chemical calculations. Physical chemistry chemical physics : PCCP, 19(9), 6454-6469. https://doi.org/10.1039/c6cp07330a
Shastri, Aparna, et al. "Electronic spectroscopy of ethyl bromide probed by VUV photoabsorption and quantum chemical calculations." Physical chemistry chemical physics : PCCP vol. 19,9 (2017): 6454-6469. doi: https://doi.org/10.1039/c6cp07330a
Shastri A, Singh PJ, Krishnakumar S, Das AK, Raja Sekhar BN. Electronic spectroscopy of ethyl bromide probed by VUV photoabsorption and quantum chemical calculations. Phys Chem Chem Phys. 2017 Mar 01;19(9):6454-6469. doi: 10.1039/c6cp07330a. PMID: 28197565.
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Ozone and carbon trioxide synthesis by low energy ion implantation onto solid carbon dioxide and implications to astrochemistry.

The Journal of chemical physics

Sivaraman B, Raja Sekhar BN, Fulvio D, Hunniford A, McCullough B, Palumbo ME, Mason N.
PMID: 23968106
J Chem Phys. 2013 Aug 21;139(7):074706. doi: 10.1063/1.4818166.

Ion implantation experiments were carried out on amorphous (30 K) and crystalline (80 K) solid CO2 using both reactive (D(+), H(+)) and non-reactive (He(+)) ions, simulating different irradiation environments on satellite and dust grain surfaces. Such ion irradiation synthesized...

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Sivaraman B, Raja Sekhar BN, Fulvio D, et al. Ozone and carbon trioxide synthesis by low energy ion implantation onto solid carbon dioxide and implications to astrochemistry. J Chem Phys. 2013;139(7):074706doi: 10.1063/1.4818166.
Sivaraman, B., Raja Sekhar, B. N., Fulvio, D., Hunniford, A., McCullough, B., Palumbo, M. E., & Mason, N. (2013). Ozone and carbon trioxide synthesis by low energy ion implantation onto solid carbon dioxide and implications to astrochemistry. The Journal of chemical physics, 139(7), 074706. https://doi.org/10.1063/1.4818166
Sivaraman, Bhalamurugan, et al. "Ozone and carbon trioxide synthesis by low energy ion implantation onto solid carbon dioxide and implications to astrochemistry." The Journal of chemical physics vol. 139,7 (2013): 074706. doi: https://doi.org/10.1063/1.4818166
Sivaraman B, Raja Sekhar BN, Fulvio D, Hunniford A, McCullough B, Palumbo ME, Mason N. Ozone and carbon trioxide synthesis by low energy ion implantation onto solid carbon dioxide and implications to astrochemistry. J Chem Phys. 2013 Aug 21;139(7):074706. doi: 10.1063/1.4818166. PMID: 23968106.
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Vacuum ultraviolet photoabsorption spectra of icy isoprene and its oligomers.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Ramachandran R, Pavithraa S, Meka JK, Rahul KK, Lo JI, Chou SL, Cheng BM, Rajasekhar BN, Bhardwaj A, Mason NJ, Sivaraman B.
PMID: 34872862
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Mar 05;268:120586. doi: 10.1016/j.saa.2021.120586. Epub 2021 Nov 09.

Isoprene and its oligomers, terpenes, are expected to be present, along with other complex organic molecules in the diverse environments of the ISM and in our solar system. Due to insufficient spectral information of these molecules at low temperature,...

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Ramachandran R, Pavithraa S, Meka JK, et al. Vacuum ultraviolet photoabsorption spectra of icy isoprene and its oligomers. Spectrochim Acta A Mol Biomol Spectrosc. 2021;268:120586doi: 10.1016/j.saa.2021.120586.
Ramachandran, R., Pavithraa, S., Meka, J. K., Rahul, K. K., Lo, J. I., Chou, S. L., Cheng, B. M., Rajasekhar, B. N., Bhardwaj, A., Mason, N. J., & Sivaraman, B. (2022). Vacuum ultraviolet photoabsorption spectra of icy isoprene and its oligomers. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 268120586. https://doi.org/10.1016/j.saa.2021.120586
Ramachandran, R, et al. "Vacuum ultraviolet photoabsorption spectra of icy isoprene and its oligomers." Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy vol. 268 (2022): 120586. doi: https://doi.org/10.1016/j.saa.2021.120586
Ramachandran R, Pavithraa S, Meka JK, Rahul KK, Lo JI, Chou SL, Cheng BM, Rajasekhar BN, Bhardwaj A, Mason NJ, Sivaraman B. Vacuum ultraviolet photoabsorption spectra of icy isoprene and its oligomers. Spectrochim Acta A Mol Biomol Spectrosc. 2022 Mar 05;268:120586. doi: 10.1016/j.saa.2021.120586. Epub 2021 Nov 09. PMID: 34872862.
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Vacuum ultraviolet photoabsorption spectra of icy isoprene and its oligomers.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Ramachandran R, Pavithraa S, Meka JK, Rahul KK, Lo JI, Chou SL, Cheng BM, Rajasekhar BN, Bhardwaj A, Mason NJ, Sivaraman B.
PMID: 34872862
Spectrochim Acta A Mol Biomol Spectrosc. 2021 Nov 09;120586. doi: 10.1016/j.saa.2021.120586. Epub 2021 Nov 09.

Isoprene and its oligomers, terpenes, are expected to be present, along with other complex organic molecules in the diverse environments of the ISM and in our solar system. Due to insufficient spectral information of these molecules at low temperature,...

Cite
Ramachandran R, Pavithraa S, Meka JK, et al. Vacuum ultraviolet photoabsorption spectra of icy isoprene and its oligomers. Spectrochim Acta A Mol Biomol Spectrosc. 2021;120586doi: 10.1016/j.saa.2021.120586.
Ramachandran, R., Pavithraa, S., Meka, J. K., Rahul, K. K., Lo, J. I., Chou, S. L., Cheng, B. M., Rajasekhar, B. N., Bhardwaj, A., Mason, N. J., & Sivaraman, B. (2021). Vacuum ultraviolet photoabsorption spectra of icy isoprene and its oligomers. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 120586. https://doi.org/10.1016/j.saa.2021.120586
Ramachandran, R, et al. "Vacuum ultraviolet photoabsorption spectra of icy isoprene and its oligomers." Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy vol. (2021): 120586. doi: https://doi.org/10.1016/j.saa.2021.120586
Ramachandran R, Pavithraa S, Meka JK, Rahul KK, Lo JI, Chou SL, Cheng BM, Rajasekhar BN, Bhardwaj A, Mason NJ, Sivaraman B. Vacuum ultraviolet photoabsorption spectra of icy isoprene and its oligomers. Spectrochim Acta A Mol Biomol Spectrosc. 2021 Nov 09;120586. doi: 10.1016/j.saa.2021.120586. Epub 2021 Nov 09. PMID: 34872862.
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Note: characterization of CaF2/acetone bandpass photon detector with Kr filter gas.

The Review of scientific instruments

Maniraj M, Raja Sekhar BN, Barman SR.
PMID: 22559593
Rev Sci Instrum. 2012 Apr;83(4):046107. doi: 10.1063/1.4704374.

A modified design of a CaF(2)/acetone bandpass photon detector that uses Kr as a filter gas to tune the energy resolution is presented. Our design combines two standard single window detector tubes to build the Kr filter gas chamber....

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Maniraj M, Raja Sekhar BN, Barman SR. Note: characterization of CaF2/acetone bandpass photon detector with Kr filter gas. Rev Sci Instrum. 2012;83(4):046107doi: 10.1063/1.4704374.
Maniraj, M., Raja Sekhar, B. N., & Barman, S. R. (2012). Note: characterization of CaF2/acetone bandpass photon detector with Kr filter gas. The Review of scientific instruments, 83(4), 046107. https://doi.org/10.1063/1.4704374
Maniraj, M, et al. "Note: characterization of CaF2/acetone bandpass photon detector with Kr filter gas." The Review of scientific instruments vol. 83,4 (2012): 046107. doi: https://doi.org/10.1063/1.4704374
Maniraj M, Raja Sekhar BN, Barman SR. Note: characterization of CaF2/acetone bandpass photon detector with Kr filter gas. Rev Sci Instrum. 2012 Apr;83(4):046107. doi: 10.1063/1.4704374. PMID: 22559593.
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Corrole-BODIPY Dyads: Synthesis, Structure, and Electrochemical and Photophysical Properties.

Inorganic chemistry

Basumatary B, Raja Sekhar A, Ramana Reddy RV, Sankar J.
PMID: 25875791
Inorg Chem. 2015 May 04;54(9):4257-67. doi: 10.1021/ic502919s. Epub 2015 Apr 15.

A free-base and its Cu(III) derivative of bichromophoric meso-β linked corrole-BODIPY dyad were synthesized and structurally characterized by single crystal X-ray diffraction (XRD). Both corrole and BODIPY fragments maintained respective ground state electronic isolation despite their connection through a...

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Basumatary B, Raja Sekhar A, Ramana Reddy RV, et al. Corrole-BODIPY Dyads: Synthesis, Structure, and Electrochemical and Photophysical Properties. Inorg Chem. 2015;54(9):4257-67doi: 10.1021/ic502919s.
Basumatary, B., Raja Sekhar, A., Ramana Reddy, R. V., & Sankar, J. (2015). Corrole-BODIPY Dyads: Synthesis, Structure, and Electrochemical and Photophysical Properties. Inorganic chemistry, 54(9), 4257-67. https://doi.org/10.1021/ic502919s
Basumatary, Biju, et al. "Corrole-BODIPY Dyads: Synthesis, Structure, and Electrochemical and Photophysical Properties." Inorganic chemistry vol. 54,9 (2015): 4257-67. doi: https://doi.org/10.1021/ic502919s
Basumatary B, Raja Sekhar A, Ramana Reddy RV, Sankar J. Corrole-BODIPY Dyads: Synthesis, Structure, and Electrochemical and Photophysical Properties. Inorg Chem. 2015 May 04;54(9):4257-67. doi: 10.1021/ic502919s. Epub 2015 Apr 15. PMID: 25875791.
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Spectroscopy of N,N-dimethylformamide in the VUV and IR regions: Experimental and computational studies.

The Journal of chemical physics

Shastri A, Das AK, Krishnakumar S, Singh PJ, Raja Sekhar BN.
PMID: 29246064
J Chem Phys. 2017 Dec 14;147(22):224305. doi: 10.1063/1.5006126.

The electronic absorption spectrum of N,N-dimethylformamide (DMF) is studied in the 45 000-80 000 cm

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Shastri A, Das AK, Krishnakumar S, et al. Spectroscopy of N,N-dimethylformamide in the VUV and IR regions: Experimental and computational studies. J Chem Phys. 2017;147(22):224305doi: 10.1063/1.5006126.
Shastri, A., Das, A. K., Krishnakumar, S., Singh, P. J., & Raja Sekhar, B. N. (2017). Spectroscopy of N,N-dimethylformamide in the VUV and IR regions: Experimental and computational studies. The Journal of chemical physics, 147(22), 224305. https://doi.org/10.1063/1.5006126
Shastri, Aparna, et al. "Spectroscopy of N,N-dimethylformamide in the VUV and IR regions: Experimental and computational studies." The Journal of chemical physics vol. 147,22 (2017): 224305. doi: https://doi.org/10.1063/1.5006126
Shastri A, Das AK, Krishnakumar S, Singh PJ, Raja Sekhar BN. Spectroscopy of N,N-dimethylformamide in the VUV and IR regions: Experimental and computational studies. J Chem Phys. 2017 Dec 14;147(22):224305. doi: 10.1063/1.5006126. PMID: 29246064.
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