Sequential Transformation in Assemblies Based on Octamoldbdate Clusters and 1,2-bis(f-pridyl)ehtane
The new hybrid inorganic-organic solids [Mo{sub 8}O{sub 26}][H{sub 2}bpe]{sub 2} ( 1), {l_brace}[Mo{sub 8}O{sub 26}({mu}-bpe)][H{sub 2}bpe]{sub 2}{r_brace}{sub n} ( 2), [Mo{sub 8}O{sub 26}(Hbpe){sub 2}][H{sub 2}bpe] ( 3), and {l_brace}[Mo{sub 8}O{sub 26}][H{sub 2}bpe]{sub 2}{r_brace}{sub n} (4) were synthesized under hydrothermal conditions. The crystal structure of 1 contains the discrete octamolybdate {beta}-isomer, whereas in 3 the inorganic building unit is a functionalized octamolybdate of general formula [Mo{sub 8}O{sub 26}X{sub 2}]{sub (2n+4)}. A similar building unit is found in 2 and 4, but forming part of polymeric 1D-arrays. In 2 the polymer is constructed from [Mo{sub 8}O{sub 26}({mu}-bpe)]{sup 4-}, and the functionalization of the anionic cluster in 4 occurs through Mo-O-Mo bonds. The sequential hydrothermal 2/3 {yields} 1 and 1 {yields} 4 transformations were observed at 145 and 180 {sup o}C, respectively. However, thermal studies of 1 and 4 revealed that both materials do not suffer any phase transitions below 340 {sup o}C for 1 or <350 {sup o}C for 4, indicating that such transformations are possible only under the hydrothermal conditions. An XRPD study as a function of the temperature of 1 also demonstrated the negligible structural changes before 330 {sup o}C.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 929861
- Report Number(s):
- BNL-80428-2008-JA; NJCHE5; TRN: US200822%%1054
- Journal Information:
- New Journal of Chemistry, Vol. 31; ISSN 1144-0546
- Country of Publication:
- United States
- Language:
- English
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