TY - JOUR
T1 - Controlling the structure and photophysics of fluorophore dimers using multiple cucurbit[8]uril clampings
AU - Wu, Guanglu
AU - Bae, Youn Jue
AU - Olesińska, Magdalena
AU - Antón-García, Daniel
AU - Szabó, István
AU - Rosta, Edina
AU - Wasielewski, Michael R.
AU - Scherman, Oren A.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85078517455&partnerID=8YFLogxK
U2 - 10.1039/c9sc04587b
DO - 10.1039/c9sc04587b
M3 - Article
AN - SCOPUS:85078517455
SN - 2041-6520
VL - 11
SP - 812
EP - 825
JO - Chemical Science
JF - Chemical Science
IS - 3
ER -