Tunable fluorescent sensing of cysteine and homocysteine by intramolecular charge transfer
摘要:
An amphiphilic oligo p-phenylene derivative (DCHO) bearing electron-donating group (-NH(CH2)2OH) and electron-withdrawing group (-CHO) has been synthesised and characterised. The sensing characteristics of this probe (DCHO) for cysteine (Cys) and homocysteine (Hcy) are studied in a mixture solution of DMSO-HEPES by UV-vis and fluorescence spectra. 1H NMR, MALDI-TOF and UV-vis titration experiments proved that thiazolidine and thiazinane derivatives were formed. The highly Cys/Hcy-selective fluorescence hypsochromic shift (110nm) can be observed due to the switching of intramolecular charge transfer, leading to potential fabrication of ratiometric fluorescent detection of Cys/Hcy.
Tunable fluorescent sensing of cysteine and homocysteine by intramolecular charge transfer
摘要:
An amphiphilic oligo p-phenylene derivative (DCHO) bearing electron-donating group (-NH(CH2)2OH) and electron-withdrawing group (-CHO) has been synthesised and characterised. The sensing characteristics of this probe (DCHO) for cysteine (Cys) and homocysteine (Hcy) are studied in a mixture solution of DMSO-HEPES by UV-vis and fluorescence spectra. 1H NMR, MALDI-TOF and UV-vis titration experiments proved that thiazolidine and thiazinane derivatives were formed. The highly Cys/Hcy-selective fluorescence hypsochromic shift (110nm) can be observed due to the switching of intramolecular charge transfer, leading to potential fabrication of ratiometric fluorescent detection of Cys/Hcy.