Tunable PET process by the intercalation of cationic styryl dye in DNA base pairs and its application as turn-on fluorescent sensor for Ag+

Current developments in fluorescent PET (photoinduced electron transfer) sensors and switches

“…The bispicolylamine moiety hiding within 11 also needs to be Like Ihmels' sensing of DNA-bounded Hg 2+ , 52 Zeng et al measure Ag + near DNA with 14. 53…”

Tetraphenylethylene-Based Tetradentate Azolium Salts: Synthesis and Selective Recognition for Ions

“…As indicated in Job's plot (the inset of Figure 3), when the molar fraction of 1 was 0.67, the χΔI value reached maximum, which indicated that 1∶2 complex stoichiometry ratio for 1•2 2 4 H POwas established. [39][40] Figure 3 UV/vis titration of 1 (1.0×10 -5 mol/L) with diverse H PO c represented the concentration of guest, and a was the constant.…”

A Novel Styryldehydropyridocolinium Homodimer: Synthesis and Fluorescence Properties Upon Interaction with DNA

“…The fluorescence intensity of D increases by a factor of 60-fold upon intercalative binding with DNA [26]. On the other hand, the intercalates DNA@SPC formed by the intercalation of the cationic styryldehydropyridocolinium dye E in DNA base pairs turned out to be high Ag + -selective fluorescence turn on chemosensors [27]. Therefore, similarly to other cationic styryl dyes, styryldehydropyridocolinium derivatives also interact with DNA with significant fluorescence enhancement due to the positively charged, planar, polycyclic nature of the dyes.…”

“…As a continuous project for the development of DNA probes [26][27][28][29], we report herein, the molecular design of a novel positively charged homodimer of styryldehydropyridocolinium dye (TPTP) and its optical properties upon interaction with DNA (Scheme 2). The choice of styryldehydropyridocolinium derivative as fluorophore was based on the following considerations: a) the positively charged, planar, polycyclic nature of the dye is not only favorable for binding to nucleic acids, but also beneficial for the intercalation process as demonstrated with other DNA probes [30][31][32][33][34][35]; b) large Stokes shift (>100 nm) is an innate nature of asymmetric cyanine dyes [36][37][38][39][40][41][42][43][44][45][46][47]; c) high mobility of the electron-donating and electronaccepting moieties of the dye around the etheno bridge usually leads to strong ICT or TICT optical changes before and after interaction with analytes [33][34][35][36][37].…”