Cation modulation of carbonyldipyrrinone (CDP) fluorescence: emission-ratiometric sensing of calcium
作者:Ali Coskun、Erhan Deniz、Engin U. Akkaya
DOI:10.1039/b501606a
日期:——
Optically dilute solutions of 2,3,7,8-tetraethyl-N,N′-carbonyldipyrrinone displays an absorbance peak at 401 nm and an emission peak at 493 nm in acetonitrile. The two carbonyl groups in the structure seems to be optimally placed for cation coordination, and when calcium ions are added in the form of a perchlorate salt, a remarkable bathochromic change in the absorption and emission spectrum takes place: the absorption peak shifts by 24 nm and the emission peak shifts by 49 nm towards the red end of the visible spectrum. The shift in the emission spectrum allows wavelength ratiometric assessment of calcium concentration. In addition, the response is highly selective with respect to the cations added.
在乙腈中,2,3,7,8-四乙基-N,N′-羰基二吡喃酮的光学稀释溶液在 401 纳米处显示吸光峰,在 493 纳米处显示发射峰。当以高氯酸盐的形式加入钙离子时,吸收光谱和发射光谱发生了显著的浴色变化:吸收峰向可见光谱的红色端移动了 24 纳米,发射峰移动了 49 纳米。发射光谱的移动可对钙浓度进行波长比率评估。此外,该反应对添加的阳离子具有高度选择性。