A highly selective OFF-ON red-emitting phosphorescent thiol probe with large stokes shift and long luminescent lifetime.
An OFF-ON red-emitting phosphorescent thiol probe is designed by using the (3)MLCT photophysics of Ru(II) complexes, i.e., with Ru(II) as the electron donor. The probe is non-luminescent because the MLCT is corrupted by electron transfer from Ru(II) to an intramolecular electron sink (2,4-dinitrobenzenesulfonyl). Thiols cleave the electron sink, and the MLCT is re-established. Phosphorescence at 598 nm was enhanced by 90-fold, with a 143 nm (5256 cm(-1)) Stokes shift and a 1.1 mus luminescent lifetime.
Ji
Shaomin
S
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, 158 Zhongshan Road, Dalian University of Technology, Dalian 116012, PR China.
Guo
Huimin
H
Yuan
Xiaolin
X
Li
Xiaohuan
X
Ding
Haidong
H
Gao
Peng
P
Zhao
Chunxia
C
Wu
Wenting
W
Wu
Wanhua
W
Zhao
Jianzhang
J
D004354:Drug Screening Assays, Antitumor; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry; D006801:Humans; D049449:Luminescence; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry*; D013438:Sulfhydryl Compounds / Q000138:chemical synthesis* / Q000737:chemistry
D005456:Fluorescent Dyes; D009942:Organometallic Compounds; D013438:Sulfhydryl Compounds; D012428:Ruthenium