Publication Date:
2014-12-20
Description:
Electron transfer (ET) from donor to acceptor is often mediated by nuclear-electronic (vibronic) interactions in molecular bridges. Using an ultrafast electronic-vibrational-vibrational pulse-sequence, we demonstrate how the outcome of light-induced ET can be radically altered by mode-specific infrared (IR) excitation of vibrations that are coupled to the ET pathway. Picosecond narrow-band IR excitation of high-frequency bridge vibrations in an electronically excited covalent trans-acetylide platinum(II) donor-bridge-acceptor system in solution alters both the dynamics and the yields of competing ET pathways, completely switching a charge separation pathway off. These results offer a step toward quantum control of chemical reactivity by IR excitation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Delor, Milan -- Scattergood, Paul A -- Sazanovich, Igor V -- Parker, Anthony W -- Greetham, Gregory M -- Meijer, Anthony J H M -- Towrie, Michael -- Weinstein, Julia A -- New York, N.Y. -- Science. 2014 Dec 19;346(6216):1492-5. doi: 10.1126/science.1259995.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK. ; Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK. Central Laser Facility, Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Science and Technology Facilities Council, Chilton, Oxfordshire OX11 0QX, UK. ; Central Laser Facility, Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Science and Technology Facilities Council, Chilton, Oxfordshire OX11 0QX, UK. ; Central Laser Facility, Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Science and Technology Facilities Council, Chilton, Oxfordshire OX11 0QX, UK. mike.towrie@stfc.ac.uk julia.weinstein@sheffield.ac.uk. ; Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK. mike.towrie@stfc.ac.uk julia.weinstein@sheffield.ac.uk.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25525241" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
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Computer Science
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Medicine
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Natural Sciences in General
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Physics
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