Conformationally resolved spectroscopy of jet-cooled methacetin

Cheol Joo Moon; Ahreum Ahn; Ahreum Min; Yeon Guk Seong; Ju Hyun Kim; Myong Yong Choi

doi:10.1016/j.cplett.2017.09.049

Conformationally resolved spectroscopy of jet-cooled methacetin

Cheol Joo Moon, Ahreum Ahn, Ahreum Min, Yeon Guk Seong, Ju Hyun Kim, Myong Yong Choi

Department of Chemistry

Gyeongsang National University

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The excitation spectra of jet-cooled methacetin (MA) have been measured using a combination of mass-selected resonant two-photon ionization and ultraviolet-ultraviolet hole-burning (UV-UV HB) spectroscopy in the gas phase. Four different UV-UV HB spectra originating from two conformers of MA (syn- and anti-MA) with their fundamental and hot transitions have been obtained. IR-dip spectroscopy has conclusively confirmed the coexistence of the two conformers with the aid of theoretical calculations. Vibronic band assignments in the low frequency region caused by internal methyl group rotation in the methyl-capped peptide group, which originate from the 1e rotational level, are presented.

Original language	English
Pages (from-to)	26-32
Number of pages	7
Journal	Chemical Physics Letters
Volume	688
DOIs	https://doi.org/10.1016/j.cplett.2017.09.049
State	Published - 2017

Keywords

IR-dip spectroscopy
Methacetin (MA)
Quantum chemical calculations
Resonant two-photon ionization (R2PI)
UV-UV hole-burning (UV-UV HB) spectroscopy

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10.1016/j.cplett.2017.09.049

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title = "Conformationally resolved spectroscopy of jet-cooled methacetin",

abstract = "The excitation spectra of jet-cooled methacetin (MA) have been measured using a combination of mass-selected resonant two-photon ionization and ultraviolet-ultraviolet hole-burning (UV-UV HB) spectroscopy in the gas phase. Four different UV-UV HB spectra originating from two conformers of MA (syn- and anti-MA) with their fundamental and hot transitions have been obtained. IR-dip spectroscopy has conclusively confirmed the coexistence of the two conformers with the aid of theoretical calculations. Vibronic band assignments in the low frequency region caused by internal methyl group rotation in the methyl-capped peptide group, which originate from the 1e rotational level, are presented.",

keywords = "IR-dip spectroscopy, Methacetin (MA), Quantum chemical calculations, Resonant two-photon ionization (R2PI), UV-UV hole-burning (UV-UV HB) spectroscopy",

author = "Moon, {Cheol Joo} and Ahreum Ahn and Ahreum Min and Seong, {Yeon Guk} and Kim, {Ju Hyun} and Choi, {Myong Yong}",

note = "Publisher Copyright: {\textcopyright} 2017",

year = "2017",

doi = "10.1016/j.cplett.2017.09.049",

language = "English",

volume = "688",

pages = "26--32",

journal = "Chemical Physics Letters",

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TY - JOUR

T1 - Conformationally resolved spectroscopy of jet-cooled methacetin

AU - Moon, Cheol Joo

AU - Ahn, Ahreum

AU - Min, Ahreum

AU - Seong, Yeon Guk

AU - Kim, Ju Hyun

AU - Choi, Myong Yong

PY - 2017

Y1 - 2017

N2 - The excitation spectra of jet-cooled methacetin (MA) have been measured using a combination of mass-selected resonant two-photon ionization and ultraviolet-ultraviolet hole-burning (UV-UV HB) spectroscopy in the gas phase. Four different UV-UV HB spectra originating from two conformers of MA (syn- and anti-MA) with their fundamental and hot transitions have been obtained. IR-dip spectroscopy has conclusively confirmed the coexistence of the two conformers with the aid of theoretical calculations. Vibronic band assignments in the low frequency region caused by internal methyl group rotation in the methyl-capped peptide group, which originate from the 1e rotational level, are presented.

AB - The excitation spectra of jet-cooled methacetin (MA) have been measured using a combination of mass-selected resonant two-photon ionization and ultraviolet-ultraviolet hole-burning (UV-UV HB) spectroscopy in the gas phase. Four different UV-UV HB spectra originating from two conformers of MA (syn- and anti-MA) with their fundamental and hot transitions have been obtained. IR-dip spectroscopy has conclusively confirmed the coexistence of the two conformers with the aid of theoretical calculations. Vibronic band assignments in the low frequency region caused by internal methyl group rotation in the methyl-capped peptide group, which originate from the 1e rotational level, are presented.

KW - IR-dip spectroscopy

KW - Methacetin (MA)

KW - Quantum chemical calculations

KW - Resonant two-photon ionization (R2PI)

KW - UV-UV hole-burning (UV-UV HB) spectroscopy

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U2 - 10.1016/j.cplett.2017.09.049

DO - 10.1016/j.cplett.2017.09.049

M3 - Article

AN - SCOPUS:85030449882

SN - 0009-2614

VL - 688

SP - 26

EP - 32

JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Conformationally resolved spectroscopy of jet-cooled methacetin

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Keywords

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