{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,4]],"date-time":"2025-10-04T08:08:46Z","timestamp":1759565326300},"reference-count":26,"publisher":"AIP Publishing","issue":"6","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2004,2,8]]},"abstract":"<jats:p>In a discharged supersonic jet of acetonitrile and carbon disulfide, we have for the first time observed an electronic transition of the NC3S radical using laser-induced fluorescence (LIF) spectroscopy. A progression originating from the C\u2013S stretching mode of the upper electronic state appears in the excitation spectrum. Each band of the progression has a polyad structure due to anharmonic resonances with even overtones of bending modes. Rotationally resolved spectra have been observed by high-resolution laser scans, and the electronic transition is assigned to \u00c3\u200a2\u03a0i\u2013X\u0303\u200a2\u03a0i. For the vibronic origin band, the position and the effective rotational constant of the upper level have been determined to be 21\u200a553.874(1) and 0.046\u200a689(4) cm\u22121, respectively. The dispersed fluorescence spectrum from the zero vibrational level of \u00c3\u200a2\u03a03\/2 has also been observed; its vibrational structure is similar to that of the LIF excitation spectrum, showing a prominent C\u2013S stretching progression with polyad structures. The vibrational frequencies of the C\u2013S stretching mode in the ground and excited electronic states are determined to be 550 and 520 cm\u22121, respectively. Fluorescence decay profiles have been measured for several vibronic levels of the \u00c3 state.<\/jats:p>","DOI":"10.1063\/1.1638742","type":"journal-article","created":{"date-parts":[[2004,2,4]],"date-time":"2004-02-04T06:08:57Z","timestamp":1075874937000},"page":"2662-2666","update-policy":"http:\/\/dx.doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":7,"title":["Laser-induced fluorescence spectroscopy of NC3S"],"prefix":"10.1063","volume":"120","author":[{"given":"Masakazu","family":"Nakajima","sequence":"first","affiliation":[{"name":"Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo\u2009153-8902, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yu","family":"Yoneda","sequence":"additional","affiliation":[{"name":"Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo\u2009153-8902, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoshihiro","family":"Sumiyoshi","sequence":"additional","affiliation":[{"name":"Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo\u2009153-8902, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yasuki","family":"Endo","sequence":"additional","affiliation":[{"name":"Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo\u2009153-8902, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"317","reference":[{"key":"2024020712345605000_r1","doi-asserted-by":"crossref","first-page":"177","DOI":"10.1039\/b006648f","volume":"30","year":"2001","journal-title":"Chem. 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