Metal–Organic Cyclohelicates as Optical Receptors for Glutathione: Syntheses, Structures, and Host–Guest Behaviors
作者:Jian Wang、Hongmei Wu、Cheng He、Liang Zhao、Chunying Duan
DOI:10.1002/asia.201000733
日期:2011.5.2
Single‐crystal structure analysis and related spectroscopic characterizations demonstrated the formation of macrocyclic helicals both in the solid state and in solution. The host–guest behavior of the cyclohelical hosts towards γ‐glutamyl‐cysteinyl‐glycine (GSH) and its component amino acids was investigated by spectroscopic titrations. UV/Vis absorption titration and NMR titrations of Zn–PDB and Zn–PMB
两种三核锌基环螺旋盐,Zn-PDB(PDB = [5-(二苄氨基)-N1',N3'-双(吡啶-2-基亚甲基)间苯二酰肼])和Zn-PMB(PMB = [5-(bodipy-含二苄基氨基和BODIPY基团的oxy)-N1',N3'-双(吡啶-2-基亚甲基)间苯二酰肼])是通过将两个含酰胺的三齿螯合剂并入间位生成的取代苯环的位置。单晶结构分析和相关的光谱表征证明了固态和溶液中都形成了大环螺旋。通过光谱滴定法研究了环螺旋宿主对γ-谷氨酰基-半胱氨酸-甘氨酸(GSH)及其组成氨基酸的宿主-客体行为。添加上述客体后,Zn-PDB和Zn-PMB的UV / Vis吸收滴定和NMR滴定表明,GSH的Glu残基位于空腔内。首席运营官-基团通过静态相互作用与金属离子相互作用。GSH的Cys部分通过氢键相互作用与宿主分子中的酰胺基相互作用,从而产生可测量的光谱变化。在添加了GSH和ESI-MS滴定溶液后,对Zn