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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Ultraviolet-Ultraviolet Hole Burning Spectroscopy for Ions Stored in a Quadrupole Ion Trap

2012년 2월 9일 10시 14분 31초
PHYS2-1 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 14시 : 30분
물리화학 - New Trends in Physical Chemistry: Young Physical Chemist Symposium
저자 및
충북대학교 화학과, Korea
We have developed a new technique of ultraviolet-ultraviolet (UV-UV) hole burning (HB) spectroscopy applicable for ions stored in a quadrupole ion-trap (QIT). The UV-UV HB spectroscopy has been extensively employed for neutral molecules produced in a supersonic jet to obtain the conformational specific electronic spectra. However, the HB spectroscopy has never been applied for ions in an ion trap because of the difficulty in distinguishing the fragment ions produced by the pump laser from those by the probe. Because all of the fragment ions produced by both of the pump and probe lasers are trapped again in the ion trap, the fragment ion signal by the pump converges into the fragment ion signal by the probe, which is irradiated with a certain time delay from the pump. However, we found that some fragment ions are not trapped but escape from the ion trap with the kinetic energy deposited from the photodissociation right after irradiation of the pump pulse and can be detected separately from those by the probe using a reflectron time-of-flight mass spectrometer next to the ion trap. Using this technique we successfully obtained the UV-UV HB spectrum of dibenzo-18-crown-6-ether complexes with alkali metal cations and confirmed the presence of only a single conformational isomer for each of those complex ions in the gas phase.