A pyrenyl-appended triazole-based ribose as a fluorescent sensor for Hg2+ ion

作者：Chen Kuan Hao; Lu Cheng Yi; Cheng Hsiu Jung; Chen Shau Jiun; Hu Ching Han; Wu An Tai^*

来源：Carbohydrate Research, 2010, 345(17): 2557-2561.

DOI：10.1016/j.carres.2010.09.010

• Chemosensor
• Ribose
• Fluorescence
• Pyrene

For the efficient detection of toxic trace metal ions, two pyrenyl-appended triazole-based D-ribose fluorescent chemosensors 6 and 7 were prepared and their fluoroionophoric properties toward transition metal ions were investigated. Chemosensors 6 and 7 exhibit highly selective recognition toward Hg2+ among a series of tested metal ions in CH2Cl2/MeOH solution. The association constants of 6 and 7 are calculated to be 1.73 x 10(5) M-1 and 4.44 x 10(5) M-1, respectively. Both 6 and 7 formed complexes with the Hg2+ ion at a 1:1 ligand-to-metal ratio with a detection limit of 10-15 mu m Hg2+. Computational analysis demonstrated that the Hg2+ ion occupied the coordination center of 6 with N-2 and N-3 atoms in two triazole groups, thus separating and distorting the two parallel pyrenes away from each other.

• 出版日期2010-11-22