Spectroscopic properties of meso-thienylporphyrins with different porphyrin cores |
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| Institution: | 1. Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India;2. Center for Materials Characterization, National Chemical Laboratory, Pune 411008, India;1. Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, 100083 Beijing, China;2. CAS Key Laboratory for Biological Effect of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), 100190 Beijing, China;3. Temple University-Beury Hall, 1901, N. 13th Street, Philadelphia, PA 19122, USA;4. China Academy of Space Technology, 100094 Beijing, China;1. School of Chemical Engineering and Technology, Tianjin University, No.92, Weijin Road, Nankaiwei District, Tianjin 300072, PR China;2. Tianjin Co-Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, PR China;1. Chair and Department of Inorganic and Analytical Chemistry, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780, Poznan, Poland;2. Chair and Department of Chemical Technology of Drugs, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780, Poznan, Poland;3. Chair and Department of Genetics and Pharmaceutical Microbiology, Poznan University of Medical Sciences, Swiecickiego 4, 60-781, Poznan, Poland;4. Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704, Poznan, Poland;5. Chair and Department of Toxicology, Poznan University of Medical Sciences, Dojazd 30, 60-631, Poznan, Poland;1. Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;2. Department of Chemistry, B.M.S. College of Engineering, Bull Temple Road, Bengaluru 560019, India;1. Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China;2. Department of Chemistry, Beijing Normal University, Beijing 100050, China |
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| Abstract: | The absorption and fluorescence properties of a series of meso-thienylporphyrins with different porphyrin cores (N4, N3O, N3S and N2S2 cores) were studied and compared with the corresponding meso-tetraarylporphyrins. The replacement of six-membered phenyl groups with five-membered thienyl groups at meso-positions resulted in red shifts and broadening of absorption and emission bands, low quantum yields and decreased S1 state lifetimes and the maximum effects were observed for meso-tetrathienylporphyrin with N2S2 porphyrin core. Similar observations were noted for the dications of meso-thienylporphyrins compared to the dications of the corresponding meso-tetraarylporphyrins. These results suggest that the replacement of six-membered aryl group with five-membered thienyl groups at meso-positions, the electronic properties of the porphyrin were altered significantly. |
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