РОССИЙСКАЯ АКАДЕМИЯ НАУК

УРАЛЬСКОЕ ОТДЕЛЕНИЕ

ИНСТИТУТ ХИМИИ TBEPДОГО ТЕЛА
   
| | | | |
| | | |
 15.05.2009   Карта сайта     Language По-русски По-английски
Новые материалы
Экология
Электротехника и обработка материалов
Медицина
Статистика публикаци


15.05.2009



A simple route to a complex cluster



14 May 2009



Chinese scientists have synthesised a giant cluster containing 60 lanthanum and 76 nickel atoms, the largest of its type. 


The four-layer cluster contains both first- and third-row transition metals, making it a member of the so-called 3d-4f family. A variety of these complexes have been made, some with over 100 metal atoms, but this one, which has a maximum dimension of 31 Ångstroms, is the largest so far, says Zhiping Zheng from Xiamen University and colleagues. 



 

 







The giant cluster may have an application in molecule-based magnets



  

Zheng's team made the cluster by mixing lanthanum nitrate, nickel nitrate and iminodiacetic acid (a ligand for the reaction) with sodium hydroxide at 80 °C. They filtered the resulting suspension and evaporated the filtrate to give the cluster as blue block-shaped crystals. 


Zheng says that determining the compound's structure by single-crystal X-ray diffraction is challenging because of disorder within the crystals. Nevertheless, they were able to deduce the exact arrangement of atoms, and found that the cluster consisted of four distinct shells. In addition, interactions between the metal atoms gives the cluster magnetic properties, something that will be the subject of further work, says Zheng. 


The conditions used to make the cluster are better controlled than in syntheses of similar compounds because they avoid the use of high pressure, says Zheng, who adds that 'other closely related clusters may be readily accessible simply by using different transition and lanthanide metal salts.' This, he says, will help to establish the structure-property relationships of these materials, which may have applications as molecule-based magnets. 


Lawrence Dahl, an expert in cluster chemistry at the University of Wisconsin Madison, US, is impressed by the work. 'The formation under carefully controlled reaction conditions of this highly organised four-shell architecture is indeed amazing.' He looks forward to further results in the field, saying that Zheng and coworkers have 'opened the door to an exciting new diversity of nanosized transition-metal materials.' 


David Barden 


 Enjoy this story? Spread the word using the 'tools' menu on the left or add a comment to the Chemistry World blog 




Link to journal article



A four-shell, 136-metal 3d-4f heterometallic cluster approximating a rectangular parallelepiped
Xiang-Jian Kong, La-Sheng Long, Rong-Bin Huang, Lan-Sun Zheng, T. David Harris and Zhiping Zheng, Chem. Commun., 2009
DOI: 10.1039/b822609a


Дизайн и программирование N-Studio 
А Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

  • © 2004-2019 ИХТТ УрО РАН
    беременность, мода, красота, здоровье, диеты, женский журнал, здоровье детей, здоровье ребенка, красота и здоровье, жизнь и здоровье, секреты красоты, воспитание ребенка рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок медицина, клиники и больницы, болезни, врач, лечение, доктор, наркология, спид, вич, алкоголизм православные знакомства, православный сайт творчeства, православные рассказы, плохие мысли, православные психологи рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок