studied by variable temperature 119mSnMössbauer spectroscopy, IR, and 1H NMR techniques. The bonding interaction between the metal and the heterocyclic ligand can be described without invoking a π-bonding mechanism to account for the resolvable quadrupole hyperfine interaction observed in the Mössbauerspectra of these compounds. The temperature dependence of the 119mSn recoil-free fraction in these
许多新化合物的4-C键合吡啶基团连接到有机锡部分上,包括(C 6 H 5 3 Sn-py,(C 6 H 5)3 Sn-py NO和(CH 3)已合成3 Sn-py-Sn(CH 3)3 Cl,并通过119m可变温度SnMössbauer光谱学,IR和1研究。1 H NMR技术。可以描述金属与杂环配体之间的键相互作用而无需调用π键机制来解释这些化合物在Mössbauer光谱中观察到的可分辨四极超精细相互作用。这些共价固体中119m Sn无反冲级分的温度依赖性是单体单元的特征,但在(CH 3)3 Sn-py-Sn(CH 3)3 Cl中观察到的面积比的温度依赖性与从Gol'danskii-Karyagin效应理论中得出的结论。
The unexpectedly challenging synthesis of 4-pyridyl-extended dithieno[3,2-b:2′,3′-d]phospholes via Stille cross-coupling is reported. The optical and electrochemical properties of the phosphoryl-bridged species were studied experimentally and computationally, and their properties were compared with those of their non-P-bridged congeners. The 4-pyridyl-extended dithienophospholes display quantitative
据报道,通过Stille交叉偶联合成了4-吡啶基延伸的双噻吩并[3,2- b:2',3'- d ]磷脂。通过实验和计算研究了磷酰基桥联物种的光学和电化学性质,并将其性质与非P桥联同类物的性质进行了比较。吡啶环甲基化后,4-吡啶基-延伸的二硫代磷腈在溶液中显示定量的发光量子产率,并且具有可逆的还原特征。由于它们具有很高的亮度,即使在水中也是如此,4-吡啶基延伸的二噻吩并磷光体是新型荧光探针的极有希望的候选者。