FJIRSM high nuclear research clusters of rare earth made ​​new progress

Polynuclear rare earth compounds in organic electroluminescence , fluorescence imaging , molecular -based magnetic materials and other fields have a wide range of applications. Rare earth ions with variable high coordination number and stereochemistry of poor selectivity , pure rare earth multicore clusters , especially high nuclear cluster of Rare Earth auditors over twenty still faces enormous challenges.

Under the auspices of the Ministry of Science , " 973 " program, the National Natural Science Foundation of China and the Natural Science Foundation of Fujian Province , State Key Laboratory of Structural Chemistry , Fujian Institute of Structure of Matter Hong Maochun project team led by academician at high temperatures and weak alkaline introduced under different anions as templating agent -induced hydrolysis of rare earth ions slowly got a forty-eight -core clusters of rare earth has a unique tubular structure . The cluster can be seen as consisting of two round -shaped eighteen nuclear erbium clusters and a ring of twelve nuclear erbium cluster configuration, the cluster core size is about 1.3 nm '1.3 nm' 1.0nm. Two different anions ( chloride ion and nitrate ) are formed and the second wheel eighteen core erbium -doped core ring by hydrogen bonding acting as a template . This dual role in the multi-core template anion hydrogen bonds are very rare earth compounds , relevant research results published in international academic journals Chem.Commun., The 2014 , 50, 1113-1115 .

Previously, the project team before the thirty-six nuclear synthesis of two rare earth clusters , of which 36 clusters with high nuclear gadolinium magnetic entropy change -ΔSm at 2.5K and ΔH = 7T time (39.66 J Kg -1 K-1), can be used as a potential magnetic refrigeration materials ; ac susceptibility imaginary part of thirty-six nuclear dysprosium ferromagnetic clusters with significant frequency dependence , showing the effects of single-molecule magnets , relevant research results published in international academic journals Chem. Sci., the 2013 , 4, 3104-3109 .

These findings not only provide new ideas for the synthesis of high -core clusters of rare earth , rare earth enriched research clusters , while also looking for rare earth-based functional materials open up new avenues.


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