[原分所演講] IAMS Lecture on June 16, 2:00pm, Dr. Poe Lecture Hall, Prof. Evan Bieske
消息來源：中研院原分所
截止日期：2016-06-03
IAMS Lecture Announcement
中研院原分所演講公告
Title: Using Light and Collisions to Change the Shape of Molecular Ions
Speaker: Prof. Evan Bieske (School of Chemistry, The University of Melbourne, Australia)
Time: 2:00 PM, June 16 (Thursday)
Place: Dr. Poe Lecture Hall, IAMS (本所浦大邦講堂 臺大校園內)
Contact: Dr. Kaito Takahashi 高橋開人博士
Abstract:
Molecular photoisomerization plays a crucial role in biological systems (cis-trans isomerization of retinal in animal vision and bacterial photosynthesis) and in molecular technologies (light activated molecular machines). To understand these systems, it is desirable to gather information on the photoisomerization behaviour of the core molecules in the gas phase. For this purpose we have developed a tandem ion mobility apparatus in which a certain isomer population is selected in the first IMS stage, followed by excitation by laser light or buffer gas collisions, with the resulting product isomers separated in a second IMS stage. The IMS-photo-IMS arrangement is the basis of a new form of action spectroscopy for molecular ions – photoisomerization action (PISA) spectroscopy. In the IMS-collision-IMS arrangement, a particular isomer is selected in the first IMS stage and its transformation to product isomers is monitored as the collision energy is increased, providing information on the magnitude of isomerization barriers. This combination of photo and collisional excitation can be used to map the isomeric landscape of biologically and technologically significant ions, including the retinal protonated Schiff base and protonated spiropyran/merocyanine molecules.
中研院原分所演講公告
Title: Using Light and Collisions to Change the Shape of Molecular Ions
Speaker: Prof. Evan Bieske (School of Chemistry, The University of Melbourne, Australia)
Time: 2:00 PM, June 16 (Thursday)
Place: Dr. Poe Lecture Hall, IAMS (本所浦大邦講堂 臺大校園內)
Contact: Dr. Kaito Takahashi 高橋開人博士
Abstract:
Molecular photoisomerization plays a crucial role in biological systems (cis-trans isomerization of retinal in animal vision and bacterial photosynthesis) and in molecular technologies (light activated molecular machines). To understand these systems, it is desirable to gather information on the photoisomerization behaviour of the core molecules in the gas phase. For this purpose we have developed a tandem ion mobility apparatus in which a certain isomer population is selected in the first IMS stage, followed by excitation by laser light or buffer gas collisions, with the resulting product isomers separated in a second IMS stage. The IMS-photo-IMS arrangement is the basis of a new form of action spectroscopy for molecular ions – photoisomerization action (PISA) spectroscopy. In the IMS-collision-IMS arrangement, a particular isomer is selected in the first IMS stage and its transformation to product isomers is monitored as the collision energy is increased, providing information on the magnitude of isomerization barriers. This combination of photo and collisional excitation can be used to map the isomeric landscape of biologically and technologically significant ions, including the retinal protonated Schiff base and protonated spiropyran/merocyanine molecules.