Journal
TETRAHEDRON LETTERS
Volume 61, Issue 31, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2020.152176
Keywords
Dibenzoylmethanatoboron difluoride; Siloxane linker; X-ray diffraction analysis; Fluorescence; Excimer
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Funding
- Russian Science Foundation [18-73-10152]
- Ministry of Science and Higher Education of the Russian Federation
- Ministry of Science and Higher Education within the State assignment FSRC Crystallography and Photonics RAS in part of quantum-chemical calculations of dyad properties [AAAA-A19-119040490079-8]
- Russian Science Foundation [18-73-10152] Funding Source: Russian Science Foundation
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A series of novel dibenzoylmethanatoboron difluoride (DBMBF2) and methoxy-substituted DBMBF2 dyads linked via flexible dimethylsiloxane linkers of variable length were synthesized and characterized. Both monomer and excimer (trough intramolecular excimer formation) emissions are observed for the dyads in dilute dichloromethane solutions at room temperature. The excimers contribution into the total fluorescence spectrum decreases with increasing siloxane linker length. The parallel-sandwich conformation of intramolecular pre-excimers formed by two terminal DBMBF2 moieties is confirmed by DFT-based calculations. (C) 2020 Elsevier Ltd. All rights reserved.
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