Transient electron spin resonance spectroscopy of the carotenoid triplet state in Rhodopseudomonas Sphaeroides wild type |
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| Affiliation: | 1. Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, 199 Ren''ai Road, Suzhou, Jiangsu 215123, China;2. State Key Laboratory of Bioreactor Engineering, and Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science & Technology, Shanghai 200237, China;3. Department of Pharmacy, Suzhou Vocational Health College, 28 Kehua Road, Suzhou 215009, China;1. Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China;2. Analytical Instrumentation Centre, Peking University, Beijing 100871, China;3. College of Textile Engineering, Taiyuan University of Technology, Jin Zhong 030600, China;1. Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu, 211189, PR China;2. Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, PR China;3. School of Environmental and Chemical Engineering, Jiangsu Key Laboratory of Function Control Technology for Advanced Materials, Jiangsu Ocean University, Lianyungang, Jiangsu, 222005, PR China;1. College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, PR China;2. Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, PR China;3. School of Polymer Science & Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China;4. Guangxi Key Lab of Agricultural Resources Chemistry and Biotechnology, College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin, 537000, China;1. School of Environmental and Chemical Engineering, Jiangsu Ocean University, Lianyungang, Jiangsu, 222005, PR China;2. Jiangsu Key Laboratory of Function Control Technology for Advanced Materials, Lianyungang, Jiangsu, 222000, PR China |
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| Abstract: | ![]()
We have determined the triplet state spin sublevel dynamics of spheroidene contained within the photosynthetic bacterium Rhodopseudonionas sphaeroides wild type. The triplet state decay dynamics were measured using direct-detection, rapid-transient, high-field, electron spin resonance spectroscopy on chromatophores isolated from the bacterium. The transient signals were analyzed as a function of microwave power to obtain the individual triplet state spin sublevel decay rate constants and the spin—lattice relaxation time. The individual triplet state spin sublevel decay constants yielded a value of 4.2±0.3 μs for the overall triplet state lifetime, which agrees with the lifetime measured previously by other workers using optical spectroscopic methods. |
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