Excimer luminescence of 9-cyanoanthracene under pressure |
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| Affiliation: | 1. Istituto di Chimica Fisica e Spettroscopia, Università di Bologna, 40136 Bologna, Italy;2. Physikalisches Institut III, Universität Düsseldorf, D-4000 Düsseldorf, FRG;1. Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education & School of Chemistry and Materials Science of Shanxi Normal University, TaiYuan, 030032, China;2. School of Physical Science and Information Technology, Shandong Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Liaocheng, 252059, China;1. Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica, MALTA Consolider Team, Universitat Politècnica de València, 46022 Valencia, Spain;2. Departamento de Física, Instituto de Materiales y Nanotecnología, MALTA Consolider Team, Universidad de La Laguna, 38207 San Cristóbal de La Laguna, Spain;3. DCITIMAC, Universidad de Cantabria, Avenida Los Castros 48, 39005 Santander, Spain;4. Departamento de Física Aplicada-ICMUV, MALTA Consolider Team, Universidad de Valencia, Dr. Moliner 50, Burjassot, 46100 Valencia, Spain;5. Instituto de Nanociencia y Materiales de Aragón, Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009 Zaragoza, Spain;6. National Center for Materials Study and Testing, Technical University of Moldova, Chisinau MD-2004, Republic of Moldova;7. Instituto de Diseño para la Fabricación y Producción Automatizada, MALTA Consolider Team, Universitat Politècnica de València, 46022 Valencia, Spain;1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, PR China;2. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China;1. Department of Physics, Harbin Institute of Technology, Harbin, 150001, China;2. National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, 622900, China |
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| Abstract: | The excimer emission of 9-cyanoanthracene has been measured at room temperature as a function of pressure. Near 8 kbar the luminescence undergoes a drastic shift to lower energies corresponding to a change of the emitting excimer from the trans, head-to-tail, to the cis, head-to-head, molecular pair. The latter excimer deactivates the photodimerization reaction due to the absence of the topochemically preformed geometry in the excited state which would favour the trans-photoproduct. |
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