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Controlling the structure and photophysics of fluorophore dimers using multiple cucurbit[8]uril clampings.

Accepted version
Peer-reviewed

Change log

Authors

Bae, Youn Jue 
Olesińska, Magdalena 
Antón-García, Daniel  ORCID logo  https://orcid.org/0000-0001-5466-2921
Szabó, István 

Abstract

A modular strategy has been employed to develop a new class of fluorescent molecules, which generates discrete, dimeric stacked fluorophores upon complexation with multiple cucurbit[8]uril macrocycles. The multiple constraints result in a "static" complex (remaining as a single entity for more than 30 ms) and facilitate fluorophore coupling in the ground state, showing a significant bathochromic shift in absorption and emission. This modular design is surprisingly applicable and flexible and has been validated through an investigation of nine different fluorophore cores ranging in size, shape, and geometric variation of their clamping modules. All fluorescent dimers evaluated can be photo-excited to atypical excimer-like states with elongated excited lifetimes (up to 37 ns) and substantially high quantum yields (up to 1). This strategy offers a straightforward preparation of discrete fluorophore dimers, providing promising model systems with explicitly stable dimeric structures and tunable photophysical features, which can be utilized to study various intermolecular processes.

Description

Keywords

3403 Macromolecular and Materials Chemistry, 3405 Organic Chemistry, 34 Chemical Sciences

Journal Title

Chem Sci

Conference Name

Journal ISSN

2041-6520
2041-6539

Volume Title

11

Publisher

Royal Society of Chemistry (RSC)

Rights

All rights reserved
Sponsorship
European Commission (607602)
Engineering and Physical Sciences Research Council (EP/L027151/1)
European Research Council (726470)
Leverhulme Trust (RP2013-SL-008)
Engineering and Physical Sciences Research Council (EP/M508007/1)
Leverhulme Trust (project: “Natural material innovation for sustainable living”), the Marie Curie FP7 SASSYPOL ITN (607602) programme, EPSRC Programme Grant (NOtCH, EP/L027151/1), ERC-2016 Consolidator Grant (CAM-RIG, 726470), Award DE-FG02-99ER14999, EPSRC(EP/M508007/1) (D.A.G.), EPSRC (EP/R013012/1, EP/L027151/1 and EP/N020669/1), BBSRC (BB/N007700/1), ERC (project 757850 BioNet).