A novel fluorescent sensor for Cr3+ based on rhodamine-cored poly (amidoamine) dendrimer

作者：Lei Yonglin^*; Su Yuanqiang; Huo Jichuan

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2011, 83(1): 149-154.

DOI：10.1016/j.saa.2011.08.006

• Poly (amidoamine) dendrimer
• Rhodamine B
• 1-Phenyl-3-methyl-5-pyrazolone
• Ring opening
• Photoinduced electron transfer

A novel poly (amidoamine)(PAMAM)dendrimer, comprising rhodamine B unit in the core and 1-phenyl-3-methyl-5-pyrazolone unit at the periphery, has been synthesized and characterized. The dendrimer shows dramatic increase in its fluorescence intensity in the presence of proton and metal cations, especially in the presence of Cr3+. The complex formed by dendrimer and Cr3+ in ethanol solution has also been studied, considering the potential application for Cr3+ fluorescent sensor. The influence of the unique chemical structure and resulted photoinduced electron transfer, as well as spirolactam ring-opening on the photophysical properties of the product has been investigated.

• 出版日期2011-12
• 单位西南科技大学