DPA-substituted coumarins as chemosensors for zinc(ii): modulation of the chemosensory characteristics by variation of the position of the chelate on the coumarin
摘要:
研究描述了两种新型二(2-吡啶基)胺(DPA)取代香豆素的传感能力,结果表明,DPA 基团与香豆素框架连接点的变化控制着它们的传感行为:4 取代体系是一种 CHEF 型传感器,在 Zn2+ 结合时荧光强度会显著增加,而 3 取代体系则是一种比率型传感器。
DPA-substituted coumarins as chemosensors for zinc(<scp>ii</scp>): modulation of the chemosensory characteristics by variation of the position of the chelate on the coumarin
作者:Nathaniel C. Lim、Christian Brückner
DOI:10.1039/b403448a
日期:——
The sensory capabilities of two novel di(2-picolyl)amine (DPA)-substituted coumarins are described and it is shown that the variation of the point of attachment of the DPA group to the coumarin framework controls their sensing behavior: the 4-substituted system is a CHEF-type sensor that shows a significant increase in fluorescence intensity upon Zn2+ binding, whereas the 3-substituted system is a ratiometric sensor.
研究描述了两种新型二(2-吡啶基)胺(DPA)取代香豆素的传感能力,结果表明,DPA 基团与香豆素框架连接点的变化控制着它们的传感行为:4 取代体系是一种 CHEF 型传感器,在 Zn2+ 结合时荧光强度会显著增加,而 3 取代体系则是一种比率型传感器。
Controlling the Fluorescence Response of PET Sensors via the Metal-Ion π-Contacting Ability of the Fluorophore: Coumarin, a Weaker π Contacter
作者:Joseph W. Nugent、Joseph H. Reibenspies、Robert D. Hancock
DOI:10.1021/acs.inorgchem.5b01766
日期:2015.10.19
fluorescence of complexes of photoinduced electron transfer sensors with heavy diamagnetic metal ions may be caused by π contacts between the metal ion and the fluorophore of the sensor, is examined with a study of the fluorescent properties of the sensor 4-[[bis(2-pyridinylmethyl)amino]methyl]-6,7-dimethoxy-1-benzopyran-2-one (cdpa) and the structures of its complexes with somemetal ions. The coumarin-type
π接触假说是通过研究金属离子与传感器的荧光团之间的π接触来检验光诱导电子转移传感器与重抗磁性金属离子的配合物的荧光猝灭,可能是由于金属离子与传感器的荧光团之间的π接触引起的。传感器4-[[[双(2-吡啶基甲基)氨基]甲基] -6,7-二甲氧基-1-苯并吡喃-2-酮(cdpa)及其与某些金属离子的配合物的结构。CDPA的香豆素型荧光团是较弱的π接触比类似物ADPA的蒽荧光团前者(无机化学。2014,53,9014):只有银我,最强π接触前,淬火CDPA的荧光,除了顺磁性的Cu II和Ni II,它通过不需要π接触的氧化还原机制猝灭荧光。[Ag(cdpa)NO 3 ](1),[Pb(cdpa)(NO 3)2 ](2),[Zn(cdpa)(NO 3)2 ](3),[Cd(cdpa)报道了Cl 2 ] 2(4),[Cd(cdpa)2 H 2 O](NO 3)2(5)和[Hg(cdpa)2 H 2 O](NO