Self-assembly of a functional cryptand core（1） having six dithiocarbamate groups and \{（dppm）Au2Cl\}2 in methanol followed by the addition of excess NH4PF6 affords a novel metallodendritic supramolecule（2）. This...Self-assembly of a functional cryptand core（1） having six dithiocarbamate groups and \{（dppm）Au2Cl\}2 in methanol followed by the addition of excess NH4PF6 affords a novel metallodendritic supramolecule（2）. This dendritic supramolecule was characterized by NMR, MS, XPS, IR, UV-Vis, luminescence spectra and elemental analyses. The results show the concentration-dependent absorption and luminescent properties in acetonitrile solution for the title compound, which may be closely related to the intramolecular and intermolecular aggregation of digold（Ⅰ） branches through Au（Ⅰ）…Au（Ⅰ） interactions.展开更多
The crystal structure of cryptand L was determined via X-ray diffraction analysis.Four solid(cryptates) of cryptand(L) with M(Ⅲ) nitrates(M=Sm,Eu,Tb,Dy) were prepared and characterized by means of fluorescence spectr...The crystal structure of cryptand L was determined via X-ray diffraction analysis.Four solid(cryptates) of cryptand(L) with M(Ⅲ) nitrates(M=Sm,Eu,Tb,Dy) were prepared and characterized by means of fluorescence spectroscopy.The fluorescence properties of those complexes show that all the cryptates have stronger luminescence intensity.That the complex of Eu(Ⅲ) has the strongest luminescence intensity(among) them shows that the cryptand′s triplet state energy matches with the vibration energy level of Eu(Ⅲ).The difference between fluorescence intensities of L cryptates and other series of cryptates implies that the (energy) transfer from L is more effective in fluorescence and antenna when L has a more flexibility structure.展开更多
一、引言自从1967年美国 du Pont 公司的 Pedersen,C.J.合成并发现冠醚化合物对碱金属、碱土金属离子的选择络合性能以来,在短短的二十年左右的时间里,已合成了数以千计的各种类型的新型冠醚,系统地研究了它们的络合性能,并把它们应用...一、引言自从1967年美国 du Pont 公司的 Pedersen,C.J.合成并发现冠醚化合物对碱金属、碱土金属离子的选择络合性能以来,在短短的二十年左右的时间里,已合成了数以千计的各种类型的新型冠醚,系统地研究了它们的络合性能,并把它们应用到有机合成、化学分析、金属离子萃取、同位素分离等许多科学领域中去。自七十年代起,我国就开始了冠醚化学的研究。十多年来,无论在新型冠醚的合成、配合物的制备与结构和性能的研究方面,还是在冠醚化合物的应用方面均取得了十分可喜的成果。展开更多
文摘Self-assembly of a functional cryptand core（1） having six dithiocarbamate groups and \{（dppm）Au2Cl\}2 in methanol followed by the addition of excess NH4PF6 affords a novel metallodendritic supramolecule（2）. This dendritic supramolecule was characterized by NMR, MS, XPS, IR, UV-Vis, luminescence spectra and elemental analyses. The results show the concentration-dependent absorption and luminescent properties in acetonitrile solution for the title compound, which may be closely related to the intramolecular and intermolecular aggregation of digold（Ⅰ） branches through Au（Ⅰ）…Au（Ⅰ） interactions.
文摘The crystal structure of cryptand L was determined via X-ray diffraction analysis.Four solid(cryptates) of cryptand(L) with M(Ⅲ) nitrates(M=Sm,Eu,Tb,Dy) were prepared and characterized by means of fluorescence spectroscopy.The fluorescence properties of those complexes show that all the cryptates have stronger luminescence intensity.That the complex of Eu(Ⅲ) has the strongest luminescence intensity(among) them shows that the cryptand′s triplet state energy matches with the vibration energy level of Eu(Ⅲ).The difference between fluorescence intensities of L cryptates and other series of cryptates implies that the (energy) transfer from L is more effective in fluorescence and antenna when L has a more flexibility structure.
文摘一、引言自从1967年美国 du Pont 公司的 Pedersen,C.J.合成并发现冠醚化合物对碱金属、碱土金属离子的选择络合性能以来,在短短的二十年左右的时间里,已合成了数以千计的各种类型的新型冠醚,系统地研究了它们的络合性能,并把它们应用到有机合成、化学分析、金属离子萃取、同位素分离等许多科学领域中去。自七十年代起,我国就开始了冠醚化学的研究。十多年来,无论在新型冠醚的合成、配合物的制备与结构和性能的研究方面,还是在冠醚化合物的应用方面均取得了十分可喜的成果。
