A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Strong Emission Enhancement in pH-Responsive 2:2 Cucurbit[8]uril Complexes (2019)

Schoder, S., Schröder, H. V., Cera, L., Puttreddy, R., Güttler, A., Resch-Genger, U., Rissanen, K., & Schalley, C. A. (2019). Strong Emission Enhancement in pH-Responsive 2:2 Cucurbit[8]uril Complexes. Chemistry: A European Journal, 25(13), 3257-3261. https://doi.org/10.1002/chem.201806337

JYU-tekijät tai -toimittajat

Puttreddy, Rakesh
Rissanen, Kari

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Schoder, Stefan; Schröder, Hendrik V.; Cera, Luca; Puttreddy, Rakesh; Güttler, Arne; Resch-Genger, Ute; Rissanen, Kari; Schalley, Christoph A.

Lehti tai sarja: Chemistry: A European Journal

ISSN: 0947-6539

eISSN: 1521-3765

Julkaisuvuosi: 2019

Volyymi: 25

Lehden numero: 13

Artikkelin sivunumerot: 3257-3261

Kustantaja: Wiley - VCH Verlag GmbH & Co. KGaA

Julkaisumaa: Saksa

Julkaisun kieli: englanti

DOI: https://doi.org/10.1002/chem.201806337

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus:

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/63266

Tiivistelmä

Organic fluorophores, particularly stimuli-responsive molecules, are very interesting for biological and material sciences applications, but frequently limited by aggregation- and rotation-caused photoluminescence quenching. A series of easily accessible bipyridinium fluorophores, whose emission is quenched by a twisted intramolecular charge-transfer (TICT) mechanism, is reported. Encapsulation in a cucurbit[7]uril host gave a 1:1 complex exhibiting a moderate emission increase due to destabilization of the TICT state inside the apolar cucurbituril cavity. A much stronger fluorescence enhancement is observed in 2:2 complexes with the larger cucurbit[8]uril, which is caused by additional conformational restriction of rotations around the aryl/aryl bonds. Because the cucurbituril complexes are pH switchable, this system represents an efficient supramolecular ON/OFF fluorescence switch.

YSO-asiasanat: supramolekulaarinen kemia; fluoresenssi; luminesenssi

Vapaat asiasanat: cucurbiturils; fluorescence enhancement; host–guest systems; intramolecular motion; Biological materials; Charge transfer; Fluorophores; Luminescence

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