Heterotrimetallic Double Cavity Cages: Syntheses and Selective Guest Binding
作者:Lynn S. Lisboa、Dan Preston、C. John McAdam、L. James Wright、Christian G. Hartinger、James D. Crowley
DOI:10.1002/anie.202201700
日期:2022.4.25
for the synthesis of two heterotrimetallicdoublecavitycages, [PdnPtmL4]6+, (where n=1 and m =2 or n=2 and m=1) is described. The cages are shown to interact with several different guest molecules. The cage with two identical cavities can bind two identical guest molecules in a non-cooperative fashion, whereas the cage with two different cavities can bind two different guests in a segregated manner
描述了两种异质三金属双腔笼的合成方法,[Pd n Pt m L 4 ] 6+ ,(其中n = 1且m = 2或n = 2且m = 1)。这些笼子被证明可以与几种不同的客体分子相互作用。具有两个相同空腔的笼可以以非合作方式结合两个相同的客体分子,而具有两个不同空腔的笼可以以分离的方式结合两个不同的客体分子。
Efficient Thermal Conversion of Poly(pyridinediylbutadiynylene)s to Nitrogen-containing Microporous Carbon
Poly(pyridinediylbutadiynylene)s, a conjugated polymer alternatively consisted of the pyridine and butadiyne units, were synthesized by oxidative polycondensation of diethynylpyridine with the Hay catalyst. They converted to microporous carbons in high yields with a high efficiency of fixation of nitrogen by heating up from room temperature to 900 °C under flowing of argon.
在 Hay 催化剂的作用下,通过二乙炔基吡啶的氧化缩聚合成了一种由吡啶和丁二烯单元交替组成的共轭聚合物--聚(吡啶二乙炔基丁二烯)。在氩气流下,将它们从室温加热到 900 ℃,它们就能高产率地转化为微孔碳,并具有很高的固氮效率。
Anion binding in aqueous media by a tetra-triazolium macrocycle
作者:Nicholas G. White、Sílvia Carvalho、Vítor Félix、Paul D. Beer
DOI:10.1039/c2ob25934f
日期:——
Three tetra-triazole macrocycles were synthesized in good yields by the copper(I)-catalysed cycloaddition of bis-triazole azides and bis-alkynes. One of these was alkylated to give a cyclic tetra-triazolium receptor, which complexes anions strongly in competitive DMSO–water mixtures. In 1 : 1 DMSO–water, the tetracationic receptor exhibits a preference for the larger halides, bromide and iodide, with all halides associating more strongly than the oxoanion, acetate. The sulfate dianion is complexed far more strongly than any of the monobasic anions (Ka > 104 M−1). Quantum mechanics/molecular mechanics simulations corroborate the experimentally determined anion binding selectivity trends.
通过铜(I)催化双三唑叠氮化物和双炔的环加成反应,以良好的收率合成了三个四三唑大环化合物。其中一种被烷基化,形成环状四三唑受体,该受体在竞争性 DMSO-水混合物中与阴离子强烈络合。在 1 : 1 DMSO-水中,四阳离子受体表现出对较大卤化物、溴化物和碘化物的偏好,所有卤化物的缔合都比含氧阴离子、乙酸盐更强。硫酸盐二价阴离子的络合能力远强于任何一元阴离子 (Ka > 104 M−1)。量子力学/分子力学模拟证实了实验确定的阴离子结合选择性趋势。
A catenane host system containing integrated triazole C–H hydrogen bond donors for anion recognition
作者:Nicholas G. White、Paul D. Beer
DOI:10.1039/c2cc34210c
日期:——
A 3,5-bis(triazole)-pyridinium motif is integrated into a catenane structural framework via chloride anion templation. The catenane host system displays a high degree of selectivity for halide anions over dihydrogen phosphate.
Evidence for Halogen Bond Covalency in Acyclic and Interlocked Halogen-Bonding Receptor Anion Recognition
作者:Sean W. Robinson、Chantal L. Mustoe、Nicholas G. White、Asha Brown、Amber L. Thompson、Pierre Kennepohl、Paul D. Beer
DOI:10.1021/ja511648d
日期:2015.1.14
The synthesis and anion binding properties of novel halogen-bonding (XB) bis-iodotriazole-pyridinium-containing acyclic and [2]catenane anionhost systems are described. The XB acyclicreceptor displays selectivity for acetate over halides with enhanced anion recognition properties compared to the analogous hydrogen-bonding (HB) acyclicreceptor. A reversal in halide selectivity is observed in the